By using RS232 for serial communication between the controller and the microcomputer working with the fire detector, the fire detector output value is displayed and stored in real time. During the experiment, in addition to recording the detector output value, the CO/CO2 infrared gas composition analyzer was used to measure the CO and CO2 volume fraction values ​​near the detector. The smoke output detector output value changes with time. Whether it is fried green pepper or kitchen fumes produced by fried fish, the output value of the photo-electricity smoke fire detector can be significantly increased until the maximum output value is 255, that is, for the photoelectric smoke detector, the excitation and reality of the two kinds of kitchen fumes Fire smoke is very similar, indicating that they are prone to false positives. Two types of kitchen fumes can also cause the output value of the ion-sensing smoke detector to rise significantly, and the real fire smoke is similar to the curve in the kitchen soot environment, that is, the kitchen fumes are also likely to cause false alarms by the ion-type fire detector.
From the above analysis, the selected two typical kitchen fumes can increase the output value of the ion-type and photoelectric-type smoke detectors, that is, they are similar to real fire smoke, and can enter the photodetector chamber to cause light scattering. It can also enter the internal ionization chamber of the ion detector to change its resistance. Therefore, the ionic and photoelectric type smoke detectors cannot distinguish between kitchen fumes and real fire fumes, and kitchen fumes are prone to false alarms. The CO and CO2 volume fractions of kitchen soot and real fire smoke over time during the six experimental periods. The CO and CO2 volume fractions of the two kitchen fumes are basically the same, while the CO and CO2 volume fractions of the four simulated real fire fumes are higher than the kitchen fumes. The volume fraction of CO in the flue gas generated by the two types of smoldering fires, such as wood pyrolysis smoldering fire and cotton smoldering fire, has obvious changes throughout the experiment; the volume fraction of CO2 generated by polyurethane plastic fire and n-heptane fire It changes significantly over time.
FEATURE:
- Cookie Press Icing Set
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- Safety food grade stainless steel material
How to use:
Wash your hand and it dry. when the dough is ready,you can use Cookie Cutter to cut biscuits out,you can make any pattern you want easily by using cookie cutter ,then you can put them on tray and into oven.
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