EMERGENCY ALARM DEVICE FOR COOKER AND KITCHEN EXTRACTOR FAN Russian patent published in 2011 - IPC G08B17/00 G08B17/06 F24C7/08 

FIELD: fire safety.

SUBSTANCE: device comprises a temperature sensor (6, 9) and an electronic circuit (4) to detect a sensor signal and to switch on an emergency signal or to send the signal to a controlling output on its basis. The electronic detection circuit (4) detects the speed of the sensor or sensors temperature variation (6, 9) and/or difference of temperatures between the sensors (6, 9), and/or speed of temperature difference variation between the sensors (6, 9), and switches the alarm signal (5) or sends the signal to the controlling output (2), when the speed of the temperature and/or temperature difference, and/or speed of temperature difference variation exceed the specified value.

EFFECT: emergency alarm reliability improvement.

23 cl, 1 dwg