Washing machine and detergent detection device thereof

Abstract

The invention discloses a washing machine and a detergent detection device thereof. The detergent detection device comprises a detection electrode, an alternating voltage generation circuit, a detection circuit and a controller, wherein the detection electrode is arranged in an automatic detergent release device of the washing machine; the alternating voltage generation circuit is connected with the detection electrode and is used for generating alternating voltage and applying the alternating voltage to the detection electrode; the detection circuit is used for generating a detection signal through detecting whether two detection ends of the detection electrode are electrified or not; and the controller is connected with the detection circuit and is used for acquiring the liquid level of a detergent in the automatic detergent release device according to the detection signal. According to the detergent detection device, an oxide film can be effectively prevented from being formed on the detection electrode and a detection failure can be avoided, so that the liquid level of the detergent can be correctly judged, a user is timely reminded to add the detergent and the reliability of the washing machine is improved.

Description

technical field [0001] The invention relates to the technical field of washing appliances, in particular to a washing machine detergent detection device and a washing machine. Background technique [0002] At present, regarding a washing machine with an automatic feeding function, its automatic detergent feeding device is arranged inside the washing machine, so that the user cannot directly see the liquid level of the detergent, so it is necessary to detect the liquid level of the detergent. The conventional detection scheme is to connect a DC voltage to the probe, that is, to set the probe at a certain position of the detergent automatic dispensing device, and to judge whether the detection electrode of the probe has conductive properties in the detergent to determine the detergent. liquid level. However, when a DC voltage is applied to the detection electrode of the probe for a long time in detergent, the detection electrode of the probe will also be in a plating state fo...

AI Technical Summary

Problems solved by technology

However, when the detection electrode of the probe is applied with DC voltage for a long time in the detergent, the detection electrode of the probe will also be in the electroplating state for a long time, resulting in the formation of an oxide film on the surface of the detection electrode of the probe

Due to the non-conductivity of the oxide film, the probe will fail, and the entire detection circuit will not work normally, and the washing machine will not be able to correctly judge the liquid level of the detergent.

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