A washing machine control method and washing machine

Abstract

The invention discloses a washing machine control method and a washing machine. The washing machine is provided with a turbidity sensor for detecting water turbidity and a conductivity sensor for detecting water conductivity. According to the washing machine control method, conductivity of clear water is detected before washing is carried out, conductivity and a turbidity value of rinsing water are detected at the same time at every rinsing stage after washing is carried out, a conductivity variable quantity is calculated according to the measured conductivity of clear water and conductivity of rinsing water, and rinsing is stopped when the turbidity value and the conductivity variable quantity are both lower than the corresponding set threshold value. During every rinsing, the washing machine can automatically detect and calculate turbidity of rinsing water and conductivity changes of rinsing water, judge whether clothes are rinsed clean according to turbidity and conductivity changes of rinsing water and stop working in time after the clothes are rinsed clean to save water and electricity. The washing machine can automatically add rinsing frequency if the washing machine detects that the clothes are not rinsed clean when the rinsing frequency reaches the set value, so that residual stains, detergents and softeners are reduced, and the purpose of healthy laundry is achieved.

Description

technical field [0001] The invention relates to the field of washing machines, in particular to a washing machine control method and a washing machine which simultaneously adopt turbidity and conductivity detection to realize washing and stop immediately. Background technique [0002] With the popularization of washing machines and the development of control technology, more intelligent washing machines are gradually coming out. How to reduce detergent residue and save water and electricity while washing clothes has always been one of the focuses of consumers. [0003] Traditional washing machines either set the washing time and rinsing times regardless of the dirtiness of the clothes or the amount of washing powder added; , softener and other washing additives, fixed washing time, no matter how much washing additives are left, washing and rinsing are the same. If too many additives are added, the rinsing may not be clean and there will be residues on the clothes, which wil...

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Problems solved by technology

[0007] But in the above-mentioned structure, because the turbidity sensor is based on light transmittance detection, if the surface of the turbidity sensor emitting unit and receiving unit used for a long time is blocked by dirt, the judgment of light refraction is insensitive and inaccurate; After the first use, air dust or washing water stains adhere to the dirt on the surface of the turbidity sensor. In the next washing, the dirt on the surface of the turbidity sensor cannot be dissolved and cleaned immediately after entering the clean water. The turbidity measured at this time is not Accurate; in addition, the method of using the above-mentioned turbidity sensor detection can only be more accurate for the detection of washing powder, and for the detection of detergent, due to the large error of the turbidity sensor, the detection of detergent residue in the rinsing stage cannot be realized at all

[0008] The traditional hardness sensor for washing machines can only detect the hardness of the washing water, but cannot judge the dirtiness of the washing water.

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