Washing machine and water inlet control method thereof

Abstract

The invention discloses a washing machine. The washing machine comprises a water inlet device, the water inlet device comprises a water inlet and a water outlet, the washing machine further comprisesa foam detecting device, the foam detecting device emits a measurement signal to the water inlet device, the height of foams in the water inlet device is determined according to the receiving time ofan echo signal, and a control device of the washing machine controls the water inlet flow of the water inlet device according to the height of foams detected by the foam detecting device. In the washing machine, the foam detecting device is additionally arranged in the water inlet device, in this way, the foams are effectively prevented from overflowing from the water inlet device, contaminating ashock absorber or other components and rusting the interior of the washing machine, and then the normal service life of the washing machine is guaranteed.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a washing machine and a water inlet control method thereof. Background technique [0002] At present, the washing machines with washing powder drop boxes on the market lack the washing powder foam detection device of the drop box, and the fixed water inlet method is used for washing. When the user adds too much detergent or uses high-foaming detergent, the foam will flow out from the overflow port. . [0003] The invention patent with application number 201610071275.3 discloses a drum washing machine and its foam detection method. The foam detection method of the drum washing machine includes: step S1: enter the washing program; step S2: turn on the electric heater (1) for heating, and detect the water level frequency; step S3: compare the detected water level frequency with the washing reference frequency , and judge whether the foam is excessive according to the comparison...

AI Technical Summary

Problems solved by technology

However, in this patent, the detection of foam is only carried out during the washing process of the washing machine. However, in essence, most of the foam is caused by the excessive amount of detergent put in the detergent delivery box. A large amount of foam is produced under the impact of incoming water. At this time, the foam easily rises and overflows from the overflow in the detergent box to the inside of the washing machine, thereby polluting the shock absorber or other components and causing the inside of the washing machine to rust, which seriously affects the use of the washing machine. performance and normal service life

Therefore, in this patent, the foam detection is only carried out during the washing stage without taking into account the foam generated in the detergent delivery box during the water inlet stage of the washing machine. Therefore, it cannot be guaranteed that the inside of the washing machine will not enter the foam.

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