Foam detection method of washing machine

Abstract

The invention relates to the technical field of washing machines, in particular to a foam detection method of a washing machine, and aims at solving the technical problem that in the prior art, in thedewatering and draining process of a top-draining washing machine, excessive foam is generated and even overflows. The method includes the steps that after washing and draining are finished, a washing drum of the washing machine starts to rotate; when or before or after the washing drum starts to rotate, a draining pump of the washing machine is started; under the condition that the washing drumrotates and the draining pump is started, the numerical value of a liquid level sensor of the washing machine is collected; according to the numerical value of the liquid level sensor, whether excessive foam is generated in the washing machine or not is judged. By adopting the method, whether excessive foam remains in the inner drum or not can be recognized, and the phenomenon of excessive foam generation in dewatering and draining can be predicted and handled in time.

Description

technical field [0001] The invention relates to the technical field of washing machines, in particular to a foam detection method for washing machines. Background technique [0002] Although the washing powder or laundry liquid in the prior art can achieve the effect of cleaning clothes after being added into the washing machine, it will increase the liquid viscosity of the washing water. When the washing machine is working, the above-mentioned washing water will form a large amount of foam in the washing bucket. Upper drainage and lower drainage are two common drainage methods adopted by washing machines with different structures. Washing machines with lower drainage structure are usually most pulsator washing machines and some drum washing machines. The outlet is set at the lower part of the washing machine, and the water is directly discharged from the outlet by using the pressure of the washing water itself. The structure is simple, no additional electricity is required...

AI Technical Summary

Problems solved by technology

The drain pump of the top-drain washing machine in the prior art cannot effectively discharge the foam in the drum, and a large amount of foam trapped in the washing tub will have a negative impact on the rotation speed of the washing tub during the dehydration operation, and in severe cases will further cause the inner tub to dehydrate The rotation speed cannot be increased rapidly, so that the moisture in the clothes and the foam attached to the clothes cannot be removed in a timely and effective manner by centrifugal means.

Further, the dehydration operation of the washing machine in the above working state not only cannot remove the foam attached to the clothes, but also further generates a large amount of new foam on the clothes

Furthermore, if excessive washing powder or laundry detergent is put into the washing machine, a large amount of foam will be generated rapidly in the washing tub during the washing, dehydrating and draining process; the continuous accumulation of the above foam will greatly increase the work in the washing tub When the air pressure is serious, it will cause: the washing bucket cannot enter water normally, the dehydration speed of the washing bucket cannot be increased normally, the moisture and foam adsorbed on the clothes cannot be shaken off normally, the foam in the washing bucket will breed internal circulation, and then the original water in the washing bucket Unfavorable phenomena such as continuous generation of more foam on the basis of foam

In addition, when the foam overflows due to excessive pressure in the washing tub, it will even further cause water leakage.

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