Detergent liquid level detection device and method for laundry machine

Abstract

The invention discloses a detergent liquid level detection device and method for a laundry machine. The detection device comprises a float-type variable resistance transducer arranged inside a detergent storage box of the laundry machine, a detection circuit used for generating detection signals according to resistance values of the float-type variable resistance transducer, and a controller which is connected to the detection circuit and used for acquiring liquid level information of the detergent inside the detergent storage box according to the detection signals, wherein the resistance values of the float-type variable resistance transducer changes along with the liquid level of the detergent inside the detergent storage box. The detection device is capable of providing convenience for measuring the liquid level of the detergent inside the laundry machine, and has the advantage of high reliability.

Description

technical field [0001] The invention relates to the technical field of washing appliances, in particular to a detergent liquid level detection device for a washing machine, a washing machine and a detergent liquid level detection method for the washing machine. Background technique [0002] For a washing machine with a detergent automatic feeding function, since the detergent storage box is built into the washing machine, the user cannot directly see the consumption of detergent. When the amount of detergent is insufficient, the user needs to be reminded to add it in time, so the liquid level of detergent needs to be detected. [0003] The current liquid level detection of detergent is realized by setting a float switch or a probe. [0004] The way to set the float switch is to set a column in the detergent storage box, put the float switch on the column, set the reed switch in the float switch, set the magnet at the specific liquid level of the storage box, when the float ...

AI Technical Summary

Problems solved by technology

However, when the electrode of the probe is applied with a DC voltage in the detergent, the electrode is actually in the state of electroplating, and an oxide film will be formed on the surface of the electrode. Due to the non-conductivity of the oxide film, the probe will fail, resulting in the entire detection The circuit is not working properly and the washing machine cannot correctly judge the detergent level

[0006] Therefore, the current detergent liquid level detection method has the defect of low reliability.

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