Control method for putting detergent into washing equipment and washing equipment

Abstract

The invention belongs to the technical field of washing equipment, and discloses a control method for detergent putting of washing equipment and the washing equipment. According to the washing equipment, the first stain index of washing water is obtained in the water inlet process; after water feeding is finished, starting to run a washing program; when the washing program runs for a preset time length, carrying out stain detection on the washing water to obtain a second stain index; and according to the first stain index and the second stain index, controlling the actual putting amount of the detergent in the operation process. According to the method and the device, the putting amount of the detergent added into the washing equipment is determined according to the two stain indexes obtained before and after washing is started for a period of time, so that the requirement of a user for adding different dosages of detergents for washing clothes with different stain degrees is met; the situation that too much or too little detergent is added into the washing equipment due to the fact that a user does not know the stain degree of the clothes is avoided, and the effects of saving the detergent and efficiently cleaning the clothes are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing equipment, and in particular, relates to a control method for adding detergent to a washing equipment and the washing equipment. Background Art

[0002] As the most widely used household appliance in people's daily life, washing equipment helps people get rid of the trouble of washing clothes and brings great convenience to people. However, with the increasing types and functions of washing equipment, it is difficult to meet the needs of different users to accurately add different dosages of detergent to clothes with different degrees of dirtiness while making it more suitable for different washing needs of users.

[0003] At present, some existing washing machines have preset detergent dosages, and users can choose the amount of detergent to add. However, under this option, users cannot accurately judge whether to add more or less detergent, which inevitably results in a waste of detergent or insufficient detergent to wash clothes.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a control method for adding detergent to a washing device and a washing device. By detecting the stain index of washing water in the washing device twice, the amount of detergent added to the washing device is determined, thereby meeting the user's needs for adding different doses of detergent to wash clothes with different degrees of stains, avoiding the user from adding too much or too little detergent to the washing device due to lack of understanding of the degree of stains on the clothes, thereby achieving the effect of saving detergent and efficiently cleaning clothes.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A method for controlling the delivery of detergent to a washing device, comprising:

[0008] The washing equipment obtains a first stain index of washing water during the water intake process;

[0009] After the water inflow is finished, the washing program starts;

[0010] When the washing program runs for a preset time, stain detection is performed on the washing water to obtain a second stain index;

[0011] The actual amount of detergent added during this operation is controlled according to the first stain index and the second stain index.

[0012] Furthermore, when the washing device starts to take in water and the washing program runs for a preset time, the detergent addition operation is not performed;

[0013] During the water intake process, the washing water is subjected to stain detection to obtain a first stain index H 1 ;

[0014] After the water is inletted, when the washing program runs for a preset time, the washing water is tested for stains again to obtain a second stain index H 2 ;

[0015] Calculate the change value of the stain index △H 0 =H 2 -H 1 , according to the change value △H 0 Determine the actual amount of detergent to be dispensed and perform the dispensing operation.

[0016] Furthermore, the washing device presets a first stain difference threshold Y 1 and the second stain difference threshold Y 2 ;

[0017] The washing equipment predetermines the standard amount of detergent S 0 ;

[0018] If the change value △H 0 ≥Y 1 , then according to the actual delivery amount S = X 1 ×S 0 Execute the delivery operation;

[0019] If Y 1 >△H 0 ≥Y 2 When the standard delivery amount S 0 Execute the delivery operation;

[0020] If Y 2 >△H 0 When the actual delivery amount S = X 2 ×S 0 Execute the delivery operation;

[0021] Among them, X 1 >1>X 2 .

[0022] Furthermore, the washing machine predetermines the standard amount of detergent S 0 ;

[0023] The washing equipment performs a water delivery amount S during the water inlet process. 1 =X 0 ×S 0 Detergent dosing operation, where X 0 <1; During the water intake process, the first stain index H is also obtained 1 ;

[0024] After the water is inletted, when the washing program runs for a preset time, the washing water is tested for stains to obtain a second stain index H. 2 ;

[0025] Calculate the change value of the stain index △H 1 =H 2 -H 1 , according to the change value △H 1 Determine the amount of detergent to be added and perform the dispensing operation again.

[0026] Furthermore, during the water intake process, the washing equipment performs stain detection on the washing water to obtain a first stain index H 1 ;

[0027] Alternatively, the washing device reads a pre-stored first stain index H 1 The value of .

[0028] Furthermore, the washing device presets a first stain difference threshold Y 3 and the second stain difference threshold Y 4 ;

[0029] The washing equipment predetermines the standard amount of detergent S 0 ;

[0030] If the change value △H 1 ≥Y 3 , then according to the supplementary delivery amount S 2 =X 3 ×S 0 Execute the delivery operation;

[0031] If Y 3 >△H 1 ≥Y 4 When the additional amount S 2 =X 4 ×S 0 Execute the delivery operation;

[0032] If Y 4 >△H 1 When the additional amount S 2 =X 5 ×S 0 Execute the delivery operation;

[0033] Among them, X 3 +X 0 >1;X 4 +X 0 =1;X 5 +X 0 <1.

[0034] Furthermore, the standard dosage of the detergent is calculated by the following formula:

[0035] S 0 =A×L

[0036] Among them, S 0 is the standard dosage of the detergent; A is the dosage of the detergent per unit volume of washing water; L is the water intake of the washing equipment for this washing.

[0037] Furthermore, each time the washing device runs a washing program, stain detection is performed on the washing water to obtain and record a third stain index;

[0038] Obtain the range of n third stain indexes obtained by n consecutive records. If the range is less than a preset threshold, determine the stain index reference value according to the n third stain indexes, and determine the standard addition concentration A of detergent in unit volume of washing water according to the stain index reference value.

[0039] A washing device, the washing device executing any one of the above-mentioned methods for controlling the addition of detergent to the washing device.

[0040] Furthermore, the washing equipment comprises:

[0041] A stain detection module, used to obtain a stain index of washing water;

[0042] The control system is used to control the actual amount of detergent added according to the difference in the stain index obtained twice by the stain detection module.

[0043] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0044] 1. By determining the change value of the stain index by comparing the two stain indexes obtained before the start of washing and after a period of time, it is possible to determine whether the dosage of the added detergent needs to be changed according to the change value of the stain index, thereby washing clothes efficiently and economically;

[0045] 2. By taking the difference between the two stain indexes, the difference is compared with the pre-set stain difference threshold. When the difference is higher than the set maximum value, more detergent is automatically added. When the difference is lower than the set minimum value, less detergent is automatically added. The entire addition process is automatically controlled by the washing equipment, which can accurately add detergent and efficiently wash clothes.

[0046] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0048] Figure 1 It is a schematic flow chart of a method for determining the concentration of detergent added to a washing device according to the present invention;

[0049] Figure 2 It is a schematic diagram of a process of judging the concentration of added detergent without adding detergent during the washing process of the present invention;

[0050] Figure 3 It is a schematic diagram of a process of adding detergent and judging the concentration of the added detergent during the washing process of the present invention;

[0051] Figure 4 It is a schematic diagram of a process for determining the standard concentration of detergent added by the washing equipment of the present invention.

[0052] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Embodiment 1

[0056] like Figure 1As shown, the present embodiment provides a method for controlling the amount of detergent added to a washing device, including: the washing device obtains a first stain index of washing water during the water intake process; after the water intake is completed, a washing program is started; after the washing program runs for a preset time, stain detection is performed on the washing water to obtain a second stain index; and the actual amount of detergent added during this operation is controlled according to the first stain index and the second stain index.

[0057] Specifically, at the beginning of washing, water is fed into the washing device, and during the process of water feeding into the washing device, the washing water is tested for stains to obtain a first stain index; then after a preset washing time, the washing water is tested for stains to obtain a second stain index; the second stain index is greater than the first stain index, and the first stain index is subtracted from the second stain index to obtain a stain index change value, and the actual amount of detergent added to the washing device is determined based on the stain index change value.

[0058] like Figure 2 As shown, in a washing method of this embodiment, the washing device starts to take in water until the washing program runs for a preset time, and the detergent addition operation is not performed; during the water intake process, the washing water is subjected to stain detection to obtain a first stain index H 1 After the water is inletted, when the washing program runs for a preset time, the washing water is tested for stains again to obtain a second stain index H 2 ; Calculate the change value of the stain index △H 0 =H 2 -H 1 , according to the change value △H 0 Determine the actual amount of detergent to be dispensed and perform the dispensing operation.

[0059] Specifically, the washing method of this embodiment is to not add detergent to the washing device after the water intake is completed, and obtain the change value of the stain index after washing for a certain period of time. More specifically, at the beginning of washing, during the process of water intake into the washing device, the washing water in the water intake process is first tested to obtain the first stain index H1, and then after the water intake is completed, detergent is not added to the washing device, washing is performed for a preset time, and then the washing water in the washing device is tested again to obtain the second stain index H2. The second stain index H2 is greater than the first stain index H1, and the first stain index is subtracted from the second stain index to obtain the change value △Н of the stain index. 0 . By the change value △H 0 To determine the actual amount of detergent to be added.

[0060] In this washing method, the washing device presets a first stain difference threshold value Y 1 and the second stain difference threshold Y 2 ; The washing equipment predetermines the standard amount of detergent S0 ; If the change value △H 0 ≥Y 1 , then according to the actual delivery amount S = X 1 ×S 0 Execute the delivery operation; if Y 1 >△H 0 ≥Y 2 When the standard delivery amount S 0 Execute the delivery operation; if Y 2 >△H 0 When the actual delivery amount S = X 2 ×S 0 Execute the delivery operation; where X 1 >1>X 2 .

[0061] Specifically, the change value of the stain index has a predetermined stain difference threshold, and the washing device also presets a standard amount of detergent S 0 , after washing for a preset time without adding detergent, if the change value of the stain index △Н0 is greater than the first stain difference threshold Y 1 , it means that the clothes washed this time have a higher stain index and are dirtier than usual. They are heavily soiled clothes, so it is necessary to put the detergent into the washing machine according to the standard amount S 0 X 1 times the amount of detergent, where X 1 >1. If the change value of the stain index △Н0 is within the first stain difference threshold Y 1 and the second stain difference threshold Y 2 If the stain index of the clothes being washed is between , it means that the stain index of the clothes being washed is within the normal stain index range of this user, and the standard amount of detergent S needs to be added to the washing machine. 0 Add detergent. If the change value of the stain index △Н0 is less than the second stain difference threshold Y 2 , it means that the stain index of the clothes washed this time is lower, which means that they are cleaner than usual and are lightly soiled clothes. Therefore, it is necessary to put the detergent into the washing machine according to the standard amount S 0 X 2 times the amount of detergent, where X 2 <1.

[0062] The actual dosage of the detergent is calculated by the following formula:

[0063] S 0 =A×L

[0064] Among them, S 0 is the standard dosage of the detergent; A is the dosage of the detergent per unit volume of washing water; L is the water intake of the washing equipment for this washing.

[0065] Specifically, the standard amount of detergent to be added needs to be determined based on the dosage of detergent added per unit volume of washing water combined with the preset washing water intake volume when the user washes clothes. The dosage of detergent added per unit volume of washing water in the washing device can be determined based on the stain index detected during the historical operation of the washing device.

[0066] like Figure 4 As shown, each time the washing device runs a washing program, when the remaining time to the end of the washing stage reaches a set time, the washing water is tested for stains to obtain and record a third stain index; the range of n third stain indexes obtained by consecutive n records is obtained, and if the range is less than a preset threshold, a stain index reference value is determined based on the n third stain indexes, and the dosage A of the detergent to be added to a unit volume of washing water is determined based on the stain index reference value.

[0067] As a specific implementation, the mode of the n third stain indexes is taken and the mode is used as the stain index reference value.

[0068] As another specific implementation, an average of n third stain indexes is taken, and the average is used as the stain index reference value.

[0069] Specifically, the stain index deviation is large in different users and different occupational working environments, but the probability of deviation in each user's home is small. The third stain index is obtained by detecting and recording the stain index of the washing water when the remaining time from the end of the washing stage of the washing device reaches a set time, such as one minute before the end of the washing stage; or from the beginning of the washing stage until the second preset time is reached, the stain index of the washing water is detected and recorded, and the second preset time is greater than the preset time when the second stain index is obtained. When the third stain index recorded for n consecutive times is basically stable, that is, the range of the obtained n third stain indexes is less than the preset threshold, the stain index baseline value can be determined based on these n third stain indexes.

[0070] This embodiment also provides a washing device, which executes the control method for adding detergent to the washing device as described above.

[0071] The washing device comprises: a stain detection module for detecting stains on washing water to obtain a stain index; and a control system for controlling the amount of detergent added according to the difference between the stain indexes obtained twice by the stain detection module.

[0072] The stain detection module includes an ultraviolet spectrum sensor. When the substance absorbs light of a specific wavelength to a maximum value, the substance has a corresponding relationship with the ultraviolet visible spectrum, thereby detecting the quality of the substance. Conventional sensors commonly used for stain detection cannot detect organic soluble stains, including oily stains, proteins, laundry detergents and emulsions, while the ultraviolet spectrum sensor can detect insoluble particles while arbitrarily detecting the above-mentioned organic soluble stains, thereby more accurately detecting the degree of stains in the washing water.

[0073] The control system is a controller of the washing device, which has the function of storing the collected values ​​of the ultraviolet spectrum sensor and further processing the collected values ​​to obtain the degree of stain and the value of the change in the degree of stain. The controller is used to further process and make logical judgments on the collected values ​​obtained from the detection module, so that it can better determine the dosage of detergent actually added to the washing device based on the difference in the stain index obtained twice by the stain detection module, combined with the pre-calculated standard value of the detergent.

[0074] The washing device is also provided with a control panel to remind the user to evaluate the effect of this washing. If the user evaluates that the washing effect meets the user's requirements, the detergent is added according to the control process described in this embodiment. If the user evaluates that the washing effect is not good, the value of the dosage A set in the system needs to be increased by △A; or the multiple of the detergent X is increased. 1 ; or Y in the stain difference threshold 1 And when the washing program is run again next time, the actual amount of detergent added is calculated according to the latest corrected stain difference threshold and the standard amount of detergent added to ensure that the user's washing standards can be met.

[0075] In this embodiment, the washing device performs a stain detection once when water is entering and after a predetermined washing time without adding detergent, and determines a first stain index and a second stain index. The change value of the stain index is determined by taking the difference between the stain indexes obtained by the two detections, and then the change value of the stain index obtained is compared with the preset stain difference threshold to determine the actual amount of detergent added. The detection is performed each time the washing program is run to ensure that the latest detergent dosage determined for this washing can be obtained each time the washing is performed. After the washing is completed, the user can also evaluate the washing, and then the standard value of the detergent and the stain difference threshold can be automatically changed according to the user's evaluation, so that the clothes can be washed more cleanly and economically.

[0076] Embodiment 2

[0077] like Figure 3As shown, the difference between this embodiment and the above-mentioned embodiment 1 is that during the water intake process, the washing device performs a detergent delivery operation to deliver a certain amount of detergent into the washing water.

[0078] Specifically, in this embodiment, the washing machine also predetermines the standard amount of detergent S 0 During the water intake process, the washing equipment performs a water injection amount of S 1 =X 0 ×S 0 Detergent dosing operation, where X 0 <1; During the water intake process, the first stain index H is also obtained 1 After the water is inletted, when the washing program runs for a preset time, the washing water is tested for stains again to obtain a second stain index H 2 ; Calculate the change value of the stain index △H 1 =H 2 -H 1 , according to the change value △H 1 Determine the amount of detergent to be added and perform the dispensing operation again.

[0079] In this embodiment, the first stain index H 1 There are at least two ways to obtain the value of . One way is to perform stain detection on the washing water during the water intake process to obtain the first stain index H 1 Another way is that the washing device reads the pre-stored first stain index value H 1 .

[0080] For the first method mentioned above, specifically, the washing method of this embodiment is to add a standard amount of S during the water inlet process at the beginning of washing. 0 X 0 times detergent, and obtain the change value of the stain index after the washing program runs for a preset time, where X 0 <1. Before adding detergent, the washing water is tested once to obtain the first stain index H 1 After obtaining the first stain index, the washing equipment is washed according to the first water input amount S during the water intake process. 1 =X 0 ×S 0 Add detergent, and after the water is filled, the washing program runs for a predetermined time, and then the washing water in the washing device is tested again to obtain the second stain index H. 2 . Second stain index H 2 Greater than the first stain index H 1 , subtract the first stain index from the second stain index to get the change value of the stain index △Н 1 . By the change value △Н 1To determine the actual amount of detergent to be added.

[0081] And because detergent is added first in this washing method, the stains are dissolved faster than the method of washing for a certain period of time without adding detergent. Therefore, it can be understood that the ΔН calculated in this embodiment 1 , which is generally greater than the △Н calculated in Example 1 0 .

[0082] With respect to the second method, since the washing device directly reads the pre-stored first stain index H 1 Therefore, the washing device can directly add detergent during the water intake process without waiting for the first stain index to be obtained before adding detergent. Specifically, the pre-stored first stain index H 1 is the initial value of tap water, which is the value of the stain index detected when stain detection is performed on tap water when the washing device is first operated.

[0083] In this embodiment, the washing device presets a first stain difference threshold value Y 3 and the second stain difference threshold Y 4 ; The washing equipment predetermines the standard amount of detergent S 0 ; If the change value △H 1 ≥Y 3 , then according to the supplementary delivery amount S 2 =X 3 ×S 0 Execute the delivery operation; if Y 3 >△H 1 ≥Y 4 When the additional amount S 2 =X 4 ×S 0 Execute the delivery operation; if Y 4 >△H 1 When the additional amount S 2 =X 5 ×S 0 Execute the delivery operation; where X 3 +X 0 >1;X 4 +X 0 =1;X 5 +X 0 <1.

[0084] Specifically, the change value of the stain index has a predetermined stain difference threshold, and the washing device also presets a standard amount of detergent S 0 , and because the stains are dissolved faster after adding detergent than washing without adding detergent, it can be understood that the preset stain difference threshold Y3 It must be greater than the preset stain difference threshold Y in the first embodiment. 1 , the preset stain difference threshold Y 4 It must be greater than the preset stain difference threshold Y in the first embodiment. 2 .

[0085] The washing procedure is based on the first dose S 1 =X 0 ×S 0 After performing the placing operation and washing for a preset time, if the obtained change value of the stain index △Н1 is greater than the first stain difference threshold value Y3, it means that the stain index of the clothes washed this time is higher, and they are heavily soiled clothes. Then, it is necessary to put the second actual amount S into the washing machine. 2 =X 3 ×S 0 Execute the delivery operation, where X 3 +X 0 >1, that is, the second actual amount added to the first actual amount is greater than the standard amount of detergent. If the change value of the stain index △Н1 is within the first stain difference threshold Y 3 and the second stain difference threshold Y 4 If the actual amount of laundry is between 100 and 100, it means that the stain index of the laundry this time is within the normal stain index range of this user's home, and the laundry equipment is fed with the second actual amount of laundry S. 2 =X 4 ×S 0 Execute the delivery operation, where X 4 +X 0 =1, that is, the second actual amount of detergent added to the first actual amount of detergent is equal to the standard amount of detergent. If the change value of the stain index △Н1 is less than the second stain difference threshold Y 4 , it means that the stain index of the clothes washed this time is lower than usual, and they are lightly soiled clothes, so it is necessary to add the second actual amount S to the washing machine. 2 =X 5 ×S 0 Execute the delivery operation, where X 5 +X 0 <1, that is, the actual amount of the second dose plus the actual amount of the first dose is less than the standard amount of detergent.

[0086] In this embodiment, regarding the evaluation of the washing effect on the control panel of the washing device, if the user evaluates that the washing effect meets the user's requirements, the detergent is continued to be added according to the control process described in this embodiment. If the user evaluates that the washing effect is not good, it is necessary to increase △A to the value of the dosage A set in the system; or increase the multiple X of the detergent. 3 ; or Y in the stain difference threshold 3And when the washing program is run again next time, the actual amount of detergent added is calculated according to the latest corrected stain difference threshold and the standard amount of detergent added to ensure that the user's washing standards can be met.

[0087] In this embodiment, a certain amount of detergent is added to the washing device before it starts running. Therefore, there are two ways to obtain the value of the first stain index. One way is to perform stain detection on the washing water to determine the first stain index before adding detergent during the water intake process. The other way is for the washing device to perform stain detection on the tap water in advance, and the detected stain index is the first stain index. After the washing device has run for a preset time, the second stain index is detected. In this embodiment, because a certain amount of detergent is added before the operation starts, the stain index and the stain difference threshold are higher than those in the first embodiment. This embodiment can also ensure that the latest determined detergent dosage for each wash can be obtained, so that clothes can be washed more cleanly and economically.

[0088] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A method for controlling the addition of detergent to a washing device, characterized in that: include: The washing equipment obtains a first stain index of washing water during the water intake process; After the water inflow is finished, the washing program starts; When the washing program runs for a preset time, stain detection is performed on the washing water to obtain a second stain index; The actual amount of detergent added during this operation is controlled according to the first stain index and the second stain index.

2. A method for controlling the addition of detergent to a washing device according to claim 1, characterized in that: When the washing machine starts to fill with water and the washing program runs for a preset time, the detergent addition operation is not performed; During the water intake process, stain detection is performed on the washing water to obtain a first stain index H1; After the water intake is completed, when the washing program runs for a preset time, the washing water is again tested for stains to obtain a second stain index H2; The change value of the stain index ΔH0=H2-H1 is calculated, the actual amount of detergent added is determined according to the change value ΔH0, and the adding operation is performed.

3. A method for controlling the addition of detergent to a washing device according to claim 2, characterized in that: The washing device presets a first stain difference threshold value Y1 and a second stain difference threshold value Y2; The washing equipment predetermines the standard amount of detergent to be put in S0; If the change value △H0≥Y1, the delivery operation is performed according to the actual delivery amount S=X1×S0; If Y1>△H0≥Y2, the delivery operation is performed according to the standard delivery amount S0; If Y2>△H0, the delivery operation is performed according to the actual delivery amount S=X2×S0; Among them, X1>1>X2.

4. A method for controlling the addition of detergent to a washing device according to claim 1, characterized in that: The washing equipment predetermines the standard amount of detergent to be put in S0; The washing device performs a detergent dosing operation with a dosing amount of S1=X0×S0 during the water intake process, where X0<1; During the water intake process, a first stain index H1 is also obtained; After the water intake is completed, when the washing program runs for a preset time, the washing water is subjected to stain detection to obtain a second stain index H2; The change value of the stain index ΔH1=H2-H1 is calculated, the additional amount of detergent is determined according to the change value ΔH1, and the adding operation is performed again.

5. A method for controlling the addition of detergent to a washing device according to claim 4, characterized in that: During the water intake process of the washing equipment, stain detection is performed on the washing water to obtain a first stain index H1; Alternatively, the washing device reads a pre-stored value of the first stain index H1.

6. A method for controlling the addition of detergent to a washing device according to claim 4, characterized in that: The washing device presets a first stain difference threshold value Y3 and a second stain difference threshold value Y4; The washing equipment predetermines the standard amount of detergent to be put in S0; If the change value △H1≥Y3, the delivery operation is performed according to the supplementary delivery amount S2=X3×S0; If Y3>△H1≥Y4, the delivery operation is performed according to the supplementary delivery amount S2=X4×S0; If Y4>△H1, the delivery operation is performed according to the supplementary delivery amount S2=X5×S0; Among them, X3+X0>1; X4+X0=1; X5+X0<1.

7. A method for controlling the addition of detergent to a washing device according to any one of claims 3 to 6, characterized in that: The standard dosage of the detergent is calculated by the following formula: S0=A×L Among them, S0 is the standard dosage of the detergent; A is the dosage of the detergent added in a unit volume of washing water; and L is the water intake of the washing equipment for this washing.

8. A method for controlling the addition of detergent to a washing device according to claim 7, characterized in that: Each time the washing device runs a washing program, stain detection is performed on the washing water to obtain and record a third stain index; Obtain the range of n third stain indexes obtained from n consecutive records. If the range is less than a preset threshold, determine a stain index reference value based on the n third stain indexes, and determine the dosage A of detergent added to a unit volume of washing water based on the stain index reference value.

9. A washing device, characterized in that: The washing device executes a method for controlling the addition of detergent to a washing device as described in any one of claims 1 to 8.

10. A washing device according to claim 9, characterized in that: include: A stain detection module, used to obtain a stain index of washing water; The control system is used to control the actual amount of detergent added according to the difference in the stain index obtained twice by the stain detection module.

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