For high-level underground chamber usually exhaust ventilation and Class 2 speed things work situation, two-speed electric ho different purpose still favorable. Two-speed fan turned quickly from a low-running, exhaust fan manufacturers, with many ho enhance speed, wind row also corresponds greatly enhanced, Chi Chau exhaust fan, then the system immediately by the exhaust Yi become smoke situation. However, in the planning process, exhaust fan fire, and we will meet the electrical control of two-speed fan problem, basically speaking from how to deal with the motor winding connection Δ-connected to a dual-Y transformation and interlock linkage of fire Self and manual control; fan in the fast circulation of defense down, and how to ensure the maximum level of credibility do smoke, how to ensure the power supply and other problems. Following on as part of the two-speed fan control discussions. Because the underground chambers by underground limiting factors and space, in the wind and air pressure and other factors of satisfaction coefficient, fire fighting systems and smoke exhaust ventilation is usually used in combination can, therefore, we in the underground garage Use two-speed fan, the same is basically the same fans and the same duct. Under normal circumstances, as the exhaust ventilation fan running at low speed applications, when a fire, fan into a fast run both stand as fire exhaust fan applications. So a machine 2 with not only decrease the cost of health made, save space, more important thing is to greatly enhance the configuration of the application rate and credibility. Should the smoke exhaust and harm are basically two systems left, but the fire exhaust fan only, produce fire bet when running, usually fewer applications, as revealed problems not easily be discovered in time and get the repairs, and real fire When not easy to guarantee Hang Shun betting applications. The two-speed fan just to overcome this deficiency, usually as an exhaust fan running, the problem appears to be excavated and get timely repairs, often in a good posture drops ready. Setting smoke damper in exhaust fan and exhaust pipe connections, not the end in the exhaust pipe set exhaust valves, exhaust valves and pay attention to the function smoke damper is completely different device. Exhaust valve usually normally closed, open fire, roof exhaust fans, and alarm host linkage, open the condition that an outbreak of fire alarm system (detector alarm), fire alarm host into automatic mode, exhaust valves open automatically linked exhaust fan starts. Smoke damper is usually always open, but also turned a fire, but when the smoke temperature reaches 280 ℃, the exhaust damper automatically closes, the linkage has been opened fan stops running. Chizhou exhaust fan _ _ Chenyu air conditioning exhaust fan later by Wu Cheng Chen-yu air-conditioning Limited. Chizhou exhaust fan _ _ Chenyu air conditioning exhaust fan buy 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.