The following diagram (two-speed fan control panel) SA usually versatile switch is in their own situation, the same as basically speaks usually exhaust fan application, both low-speed operation. When the fire generated, K closed, KAl power, should the case exhaust fan in the situation, roof exhaust fans, the normally closed contact KAl Chu soldiers cut off KMl exchanges winding circle, KMl off, KMl normally closed contact closure , communication device KM2, KM3 connected, high-temperature exhaust fan, forcing the exchange to rapidly exhaust fan situation. When the duct temperature reached and the realization of 280 ~ C, a temperature valve fittings hinder fire behavior, close-valve, exhaust fan manufacturers, YE off, KM2, KM3 de-energized, the fan out of operation. When the all-around at the manual switch SA situation, Zhangjiajie exhaust fan, as to complete high and low exchange, although this time the fire control linkage signal at very IMPACT lose effect, but after the emergency control can be achieved and realized the same attempt. Products; fire exhaust fan installed in the production of it can be directly connected to the wind pipe or wall mounting, and it can be installed in the form of vertical or horizontal, so it saves area in a large extent. In addition, it also can run continuously under high temperature 300 ℃ for 60 minutes or more, at a temperature of 100 ℃ for 20 hours / time is not damaged, it is widely used in high buildings, oven, underground garage, tunnels and other occasions. Exhaust fan fire a wide range: it can according to the different requirements of senior civil use of variable speed or multi-speed drive form, in order to achieve one machine (ie, when used through ventilation and fire high-temperature exhaust) purposes; leaf type divided axial flow (HTF-Ⅰ, Ⅱ) and mixed flow (HTF-Ⅲ, Ⅳ), so fans of the series has a wide range of performance parameters. Special attention is required when users require a higher noise, it can be made into a silencer-type fan. As we all know, a large amount of smoke and heat fire, and consume large amounts of oxygen. On its hazards, particularly at night to smoke, smoke contains many toxic elements, even though non-toxic, can also lead to hypoxia due to combustion asphyxiation death. Every fire accidents in the burned persons, most are also the first to be smoked fainted after being burned when the fire smoke spread fast, level up to 0.5-0.8m / s, vertical up to 6-8m / s. In the fire, the one fire, and then a smoke control. Is off the fire extinguishing, broken smoke source, smoke control system was to provide safe passage to escape, and to facilitate the initial fire; smoke control system is referred to as the smoke and smoke two parts. Today, while the height of high-rise buildings, but also the depth development of space, underground development, and high-rise buildings in the basement, the smoke control system is very important. The design of the unit concerned, we should pay attention to prevention in the design, exhaust design. Zhangjiajie exhaust fan | Chenyu air conditioning | exhaust fan service provided by Wu Cheng Chen-yu air-conditioning Limited. Zhangjiajie exhaust fan | Chenyu air conditioning | exhaust fan maintenance 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.