Dehumidifier

A dehumidifier comprising:

• a housing;
• a water tank mounted in the housing;
• a detection device including:
• a detector arranged at the housing;
• and
• a signal trigger arranged in the water tank, the signal trigger including a hollow interior and a water inlet hole communicating the hollow interior and the water tank, and the whole signal trigger being configured to:
• move to a detection area of the detector in response to a water level in the water tank being higher than a preset position, and
• move out of the detection area of the detector in response to the water level in the water tank being lower than the preset position;
• and
• a controller electrically coupled to the detection device and configured to control a pump to stop pumping water in response to the signal trigger being located outside the detection area of the detector.