Analog diferential quantative constant-temp fire detector with auto-detection device

The utility model relates to an analog constant temperature fire detector with self-checking device, comprising a sensitive element, an air pressure monitoring device with self-checking function and an electric monitoring device with microprocessor. Operation principle of the utility model is that a...

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Bibliographic Details
Main Author ZHIMIAN LIU
Format Patent
LanguageEnglish
Published 19.03.2003
Edition7
Subjects
FIRE-FIGHTING
HUMAN NECESSITIES
LIFE-SAVING
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Summary:The utility model relates to an analog constant temperature fire detector with self-checking device, comprising a sensitive element, an air pressure monitoring device with self-checking function and an electric monitoring device with microprocessor. Operation principle of the utility model is that air volume expands when pneumatic sealing system is heated and relevant pressure increases at certain rate and the added pressure value and rate value are input into the electric monitoring device to direct differential temperature or constant temperature response by means of value set by the microprocessor software in fire. Since be provided with intelligent ability to determine the false fire from the true one, the detector will produce no actuating signal in case of change of temperature due to climate or other external factors.
Bibliography:Application Number: CN2002211946U