Exhaust fan fire setting Location: Distance exhaust fan fire tunnel side walls should not be too close, so as not to affect the ventilation exhaust fan fire tunnel wall arranged a minimum distance of about 20 cm from the exhaust fan, rescue 'fixed' settings will Disaster tunnel is divided into different regions, make full use of deviated and both ends of the tunnel exhaust fan fire rescue station designated as wind and smoke into the new channel, ventilation must be maintained at a positive pressure cross-channel port, preventing the flow of flue gas the channel ventilation system blows air from the accident tunnel through a secure tunnel to cross the channel, inhibiting the flue gas into a cross-channel and tunnel accident did not occur to meet the evacuees facing fresh air into the tunnel cross passages and safety, while ensuring waiting area needed fresh air inside the tunnel according to different regions use different accident disaster prevention ventilation. 'sentinel' Disaster ventilation program implementation point relief when the train, in the 'point' of contact within the scope of all the cross-channel settings reversing fan get fresh air from within the security tunnel. Since the basement subsurface conditions and space restrictions by, to meet the air flow and pressure conditions and other parameters, fire protection systems and smoke exhaust ventilation is usually used in combination , so we use two-speed fan in the underground garage, which is the same fans and the same duct. In general, as the exhaust ventilation fan running at low speed use, when a fire, fans immediately becomes the high-speed operation, used as a fire exhaust fan. Such a machine with two, not only to reduce the construction cost, space saving, more importantly, greatly improving the efficiency and reliability of the equipment. If the exhaust and smoke control are completely separate the two systems, and fire exhaust fan is only put into operation when the fire occurred, rarely used, then the failure is difficult to be discovered and get timely maintenance, and when the real fire exhaust fan applications, but also difficult to ensure the smooth and put into use. The two-speed fan just to overcome this shortcoming, usually as an exhaust fan running, problems can be discovered in time and be repaired, always in a good state of readiness. As far as we designed several projects in recent years in terms such as Tian Mu Road Shanghai Railway Bureau electronic dispatch building, the building a total of 16 floors, basement (about 2000m2) for the parking garage. We consider the mechanical design and mechanical exhaust smoke, which set outlet in every stairwell, front room and other parts, by pressurized air supply fan, to form a positive pressure to prevent smoke intrusion, to ensure the safe evacuation . Set exhaust valve exhaust fan installed, the roof or the wall near the ceiling set in the pipe exhaust port, the high temperature flue gas exhaust smoke machine outdoors. And in the case of a large area with a smoke partition, just behind where the smoke detector smoke alarm smoke partition. This is to prevent any expansion of the scope of smoke, causing smoke and fire spread. Otherwise, not only affect the smoke effect, but also may be due to high temperature flue gas led to the non fire sprinkler nozzle rupture site and indiscriminate spraying, affecting both the fire effect, and cause unnecessary damage. _ Chen Yu Qingyuan exhaust fan exhaust fan air-conditioning _ advantages offered by Wu Cheng Chen-yu air-conditioning Limited. Qingyuan exhaust fan air-conditioning _ _ Chenyu advantage exhaust fan is wucheng Chenyu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) this year introduced a new upgrade, the above picture is for reference only, please call or pictures on this page contact telephone number, to obtain the latest information, contact: sand manager.