In smoke-filled fire scenes, mobile fire smoke extraction fans are not only tools but also crucial for breaking through visibility barriers and creating rescue pathways. Mastering some practical techniques can ensure faster and more stable operation in critical moments, providing both safety and efficiency for personnel.
The first technique involves quickly assessing the environmental situation. Upon arrival, do not rush to turn on the fan. First, use external observation, thermal imaging, or by consulting knowledgeable individuals to determine the main direction and temperature distribution of the smoke, and then determine the appropriate locations for the inlet and outlet. Prioritize deploying the fan upwind or side-upwind to keep the extracted smoke away from uncontrolled areas, while allowing fresh air to flow in naturally, creating a smooth ventilation path. In underground or semi-enclosed spaces, the channel layout can be used to create a pressure difference, guiding the smoke to be extracted in a concentrated manner and preventing it from spreading to the rescue area.
The deployment location and angle directly affect effectiveness. The air inlet should be aimed at the core area where smoke is concentrated, maintaining a certain distance to prevent the inhalation of open flames or high-temperature particles that could damage the blades. The air outlet should lead outdoors or to a low-risk area, ideally aligning with the wind direction to reduce resistance. When pushing wheeled models, ensure the ground is flat and slip-resistant, adding padding if necessary. For models with handles, hold firmly with both hands to avoid collisions and deformation that could affect airflow.
Adjusting operating parameters requires careful consideration. After starting, observe the equipment's vibration and noise at low speed. Once normal, gradually increase the airflow. Avoid using the maximum setting immediately to prevent excessive instantaneous load or disturbance of the smoke layer structure. Monitor the temperature of the machine body and exhaust outlets during operation to prevent overheating damage. For fuel-powered models, monitor fuel levels; for electric models, ensure reliable cable insulation and grounding. Maintain communication with the attack team and dynamically optimize position and airflow based on visibility and temperature changes.
Skillful coordination with other tactics can amplify the effect. During smoke extraction, fine water mist can be used to cool the area near the air inlet, mitigating the impact of high-temperature smoke on equipment and personnel. In multi-story buildings, layered and segmented smoke extraction should be employed, clearing the upper floors first and then proceeding downwards to prevent backflow of smoke from lower floors. For narrow alleys or complex structures, a relay system can be used, with one unit at the front for suction and another at the rear for diversion, creating a continuous ventilation zone. Industry practice shows that these techniques can significantly improve visibility within tens of seconds and reduce interior attack preparation time by nearly half.
These techniques, derived from repeated frontline experience, enable mobile fire smoke extraction machines to function quickly and reliably in changing fire situations, becoming highly efficient helpers in breaking through smoke, clearing paths, and protecting lives.
