| 摘要 |
Thermal fire alarm relates to the sphere of fire signalization and can be used in systems of fire alarm to detect the increase of the ambient air temperature more than the established level value. Thermal fire alarm has a LED, thermal sensor, six resistors, three condensers, two transistor and diode, additionally has the second diode and seven resistor. The proposed thermal fire alarm due to utilization of the few number of elements and their relations is provided conformity to all requirements of normative documents to thermal fire alarms, besides, such alarm provides preservation of its state after termination of action of the pulses of the tension of reverse direction created by the control and indicating equipment with the sign reading supply feed of fire alarm.
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