Fire detector of fixed temperature

摘要

PURPOSE: A constant temperature type fire detector is provided to simplify a manufacturing process and configuration without a separate maintaining circuit. CONSTITUTION: A constant temperature type fire detector consists of a power supply unit(10), a fire detection unit(20). The power supply unit rectifies an alternating current to a direct current and supplies power source for fire detection. The fire detection unit receives power from the power supply unit and changes resistance at a specific temperature. The fire detection unit generates a fire detection signal according to the change of the resistance or continuously maintains the fire detection signal for a certain time period. The fire detection unit changes the resistance based on a metal insulator phase transition phenomenon.