Water leakage detection device, water leakage detection method and air conditioner

The invention provides a water leakage detection device, a water leakage detection method and an air conditioner, the water leakage detection device comprises two wires and a detection unit, the detection unit comprises two electrodes connected with the two wires respectively, a gap is formed between the two electrodes, the two electrodes can be conducted through water reaching the gap, and the water leakage detection unit is connected with the two electrodes. The water leakage detection device comprises at least two detection modules arranged at different positions in the extension direction of the water leakage detection device. The detection module comprises at least two detection units arranged at different height positions; and the electric conductivities of the electrodes of different detection modules are different. The water leakage detection method is realized by adopting the water leakage detection device. The water leakage detection method comprises the following steps: acquiring a detection signal