Alarm device for a kitchen range or range hood

摘要

The invention relates to an alarm device (1, 11) which detects whether a plate for a gas or electric stove is switched on empty or if the cooker fan's grease filter is too dirty. The device has at least one temperature sensor (6, 9) and sensing electronics (4), which sense the sensor data and on the basis of them alarm or start the control output. The sensing electronics (4) identify the rate of change of the temperature of the sensor or sensors (6, 9) and / or the temperature differences of the sensors (6, 9) and / or the rate of change of the temperature difference of the sensors (6, 9) and trigger an alarm (5) or turn on the control. the output (2) when the rate of change of temperature and / or temperature difference and / or rate of change of temperature difference exceeds a certain value.