防火卷簾門按開啟狀態分為常閉防火門和常開防火門

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　　防火卷簾門按開啟狀態分為常閉防火門和常開防火門。常閉防火門普通由防火門扇、門框、閉門器、密封條等組成，雙扇或多扇常閉防火門還裝有次第器。防火卷簾門通常不需求電氣專業提供自控設計，但也有些特殊狀況如：分散通道上的常閉防火門，當一些大型建筑方有防盜等管理上的要求時應由電氣專業配合設計，盡可能全面的降低安全隱患。

　　The fire shutter doors are divided into normally closed fire doors and normally open fire doors according to the open state. Normally closed fire doors are usually composed of fire door fans, door frames, door closers, sealing strips, etc. Double or multiple normally closed fire doors are also equipped with secondary devices. Fire shutter doors usually do not require electrical professional to provide self-control design, but there are also some special conditions such as: normally closed fire doors on the dispersed channel. When some large buildings have administrative requirements such as anti-theft, they should be designed by electrical professional as comprehensive as possible. Reduce security risks.

　　而關于常開防火門，它是除具有常閉防火門的一切配件外，還須增加防火門釋放開關，而且必需由電氣專業提供自控設計。通常會在人流物流較多的分散通道上應用到。這兩類的簾面與單板式鋼質防火卷簾相同，前者在每節簾片的串接處中間加一根鉆有小孔的薄壁鋼管，在簾面二端設二根軟橡膠與薄壁鋼管相接。當火災發作時，水經橡膠軟管流人鋼管內并從小孔滲漏出來，遇熱汽化，吸收并帶走簾片的熱量，使之降溫。后者是在簾片背火面側設一鋼管，在鋼管上密密麻麻地鉆上小孔，當發作火災時，水經小孔射出灑在簾片上，逆流而下，吸熱、蒸發，使簾片降溫。

　　As for the normally open fire door, it is necessary to add a fire door release switch in addition to all the accessories with a normally closed fire door, and it must be provided by the electrical professional to provide a self-control design. It is usually applied to a dispersed channel with a large flow of people. These two types of curtains are the same as the single-plate steel fireproof roller blinds. The former adds a thin-walled steel pipe with small holes in the middle of each joint of the curtains, and two soft rubbers at the two ends of the curtain. It is connected to a thin-walled steel pipe. When a fire breaks out, the water flows through the rubber hose and leaks out of the small hole. When it is heated, it vaporizes, absorbs and takes away the heat of the curtain to cool it. The latter is to set up a steel pipe on the side of the back surface of the curtain. On the steel pipe, a small hole is drilled densely. When a fire breaks out, water is sprayed through the small hole and sprinkled on the curtain, and flows down, absorbs heat and evaporates, making the curtain The film cools down.

　　這兩類特級防火卷簾門雖都能滿足標準請求，但存在如下缺陷：①水以細流方式射出，流淌水較多，所需單位時間消防用水量大;②鋼質水管上的小孔，孔徑小，平常不用，時間長了易產生銹蝕梗塞，使噴水不均，影響時效; ③汽霧式鋼質特級防火卷簾門膠管易老化，重復彎曲易毀壞。

　　Although these two types of special-grade fire shutters can meet the standard requirements, they have the following defects: 1 water is sprayed in a trickle manner, and there are more flowing water, and the required water consumption per unit time is large; 2 small holes in the steel water pipes, The pore size is small, usually not used. It takes a long time to produce rust infarction, which makes the water spray uneven and affects the aging effect. 3 The steam mist type steel super-grade fire shutter door hose is easy to aging, and the repeated bending is easy to destroy.