How does the CO concentration controller start and stop the smoke exhaust fan?
Keywords: CO concentration controller, smoke exhaust fan.
In order to ensure the air quality in the underground garage, the CO concentration controller plays a vital role in the garage. When the CO concentration in the garage exceeds the safety standard, the controller will start the smoke exhaust fan to discharge the harmful gases out of the garage to ensure the safety of personnel. Conversely, when the CO concentration drops to a safe range, the controller shuts down the exhaust fan to save energy and resources.
First, let's understand how the CO concentration controller works. The CO concentration controller usually consists of one or more CO detectors, which are mounted on the pillars of the garage in order to monitor the CO concentration in the garage in real time. As soon as the CO concentration is detected to exceed a pre-set safe value (e.g. 25 ppm), the detector sends out an alarm signal. This signal is received by the CO concentration controller, which starts the smoke exhaust fan via the low-speed start control module of the connected two-speed blower according to the preset logic judgment.
Fume exhaust fans are usually installed at the top or outlet of the garage in order to effectively vent harmful gases out of the garage. With the help of a fan, the air in the garage begins to circulate and the CO concentration gradually decreases. When the CO concentration in the garage drops to a safe range (e.g. below 15ppm), the CO detector stops the alarm and sends a signal back to the CO concentration controller. Based on the received signal, the controller switches off the smoke exhaust fan via the control module.
In this way, the CO concentration controller enables intelligent control of the smoke exhaust fan. It can automatically start and stop the fan according to the CO concentration in the garage, which not only ensures the health and safety of the people in the garage, but also effectively saves energy and resources. This intelligent control method has been widely used in modern underground garages, providing a strong guarantee for creating a safe and comfortable environment.