What are the main applications of carbon monoxide detectors?
The production of carbon monoxide in the underground garage mainly comes from the automobile engine, which will produce a large amount of exhaust gas due to insufficient combustion. The underground parking lot belongs to a closed environment and the exhaust gas is not easy to discharge, which will damage people's health. Therefore, underground garages and parking lots should be equipped with air supply and exhaust systems. According to the different areas of the parking lot and the design of gas detectors, the concentration of carbon monoxide in the underground garage is fully detected. When the CO concentration in the environment exceeds the preset alarm value, it can automatically alarm and automatically start the exhaust system for replacement.
At present, the purpose of installing the carbon monoxide detection system in the underground garage is mainly to
1. Real-time detection of the carbon monoxide concentration value in the underground garage environment, regular ventilation to ensure that the carbon monoxide concentration in the garage is lower than the harmful level,
2. The alarm value can be set freely, and the exhaust system can be automatically linked when the concentration value exceeds. The exhaust is carried out according to the concentration of carbon monoxide. When the concentration exceeds the standard, the exhaust system is automatically driven. When the concentration returns to normal, the fan is automatically turned off to avoid energy waste caused by excessive exhaust frequency.
3. The gas detector is connected to the control host through a cable, and the concentration values of multiple fire protection zones are centrally displayed and monitored, and the concentration values are displayed in real time.
How to design and install the carbon monoxide detector in the underground garage?
At present, there is no national standard for the setting of carbon monoxide detectors in underground garages, and the setting is mainly based on the provisions in the "Code for Design of Combustible Gas and Toxic Gas Detection and Alarm Design in Petrochemical Enterprises" (GB50493-2009). The number of carbon monoxide detectors in the underground garage is mainly based on factors such as the size of the root area, generally about 300 square meters. The installation height is about 0.3-0.5 meters from the ground
2. There are two common signal transmission methods for carbon monoxide detectors: 4-20ma/RS485. Considering the simplicity and cost of wiring, it is recommended to choose RS485 signal
3. How to set the alarm value? It is generally recommended that the alarm value be set at 30ppm. The high alarm is set at 40ppm, when the concentration value exceeds 30ppm, it will automatically remind and exhaust. Because the average adult can bear up to 50ppm within eight hours
