Water boiler with water leak recognition function

摘要

The device (100) has a water reservoir (1) for receiving of water to be warmed. A water inlet (11) is provided for feeding of water to be warmed. A water outlet (12) is provided for discharging of warm water from the water reservoir. A heat device is provided for warming of water in the water reservoir. A sound transceiver (4) detects change of tone frequency that is caused by leakage of water from the water reservoir. The transceiver comprises a piezo-electrical element for transmission of sound waves with certain sound frequency.