PP air duct, also known as plastic air duct, is a kind of air duct made of PP raw materials or sheet materials. There are two kinds of air ducts: conventional air duct and flame retardant air duct.

　　PP管道是一种降低有害气体浓度的基础设施。PP风管的生产和安装的板材、管材等主要成品材料按照设计及相关成品的现行国家标准进行，并申请出厂检验合格证，进厂材料应按照现行国家标准进行。

　　PP pipeline is an infrastructure to reduce the concentration of harmful gases. PP air duct production and installation of plates, pipes and other main finished materials shall be carried out in accordance with the current national standards of the design and related finished products, and the factory inspection certificate shall be applied for. Incoming materials shall be carried out in accordance with the current national standards.

　　根据作用机理的不同，全通气可分为稀释通风和置换通风。

　　According to the mechanism, total ventilation can be divided into dilution ventilation and displacement ventilation.

　　稀释通风，又称混合通风，即送人比室内污染物浓度低的空气与室内空气混合，以降低室内污染物浓度，达到难以达到的卫生标准。

　　Dilution ventilation, also known as mixed ventilation, is to send people to mix the air with the indoor air which is lower than the concentration of indoor pollutants, so as to reduce the concentration of indoor pollutants and reach the health standards that are difficult to reach.

　　在置换通风系统中，新鲜的冷空气以极低的速度从房间底部出来

　　In a displacement ventilation system, fresh cold air comes out of the bottom of the room at a very low speed

　　像水一样稠密的新鲜空气充满了房间的底部。热源引起的对流热空气使室内温度垂直波动，气流缓慢上升，离开工作区域。

　　Fresh air, as dense as water, fills the bottom of the room. The convective hot air caused by the heat source makes the indoor temperature fluctuate vertically, the air flow rises slowly and leaves the working area.

　　室内空气就像活塞一样。房间的空气从顶部也活跃,和操作区域基本上是空气进来,也就是说,污染物的浓度在操作区域约等于空气的浓度,这是区别置换通风和传统稀释通风。

　　Indoor air is like a piston. The air in the room is also active from the top, and the operation area is basically the air coming in, that is to say, the concentration of pollutants in the operation area is about equal to the concentration of air, which is the difference between displacement ventilation and traditional dilution ventilation.

　　阻燃风管是一种先进的环保技术。它的作用是净化废气和灰尘，使我们的生活环境越来越好。

　　Flame retardant air duct is an advanced environmental protection technology. Its function is to purify exhaust gas and dust, so that our living environment is getting better and better.

　　有害气体处理的阻燃管主要包括硫酸雾,盐酸雾,铬酸雾,硝酸雾,雾磷酸、氢氟酸雾,氯化氢,氟化氢、硫化氢、氰化氢和其它高污染产业吸收和净化处理,符合要求。

　　The flame retardant tubes for hazardous gas treatment mainly include sulfuric acid mist, hydrochloric acid mist, chromic acid mist, nitric acid mist, phosphoric acid mist, hydrofluoric acid mist, hydrogen chloride, hydrogen fluoride, hydrogen sulfide, hydrogen cyanide and other high pollution industries absorption and purification treatment, which meet the requirements.

　　PP阻燃管是由超高分子量聚乙烯、管材制成，其分子量可达200万以上的小磨损指数，使其具有很高的抗滑动摩擦能力。耐磨性是一般合金钢的6.6倍，不锈钢的27.3倍。17.9倍于酚醛树脂，6倍于尼龙，4倍于聚乙烯，大大提高了管道的使用寿命。

　　PP flame-retardant pipe is made of ultra-high molecular weight polyethylene and pipe. Its molecular weight can reach more than 2 million with small wear index, which makes it have high anti sliding friction ability. Wear resistance is 6.6 times that of general alloy steel and 27.3 times that of stainless steel. 17.9 times of phenolic resin, 6 times of nylon, 4 times of polyethylene, greatly improving the service life of the pipeline.

　　抽油烟机使用一段时间后,抽油烟机叶轮,排气扇阻燃管将坚持大量的石油,提高叶轮的重量,所以它是不可避免的增加了风轮的旋转动能,使电动机启动电流增加。

　　After using the range hood for a period of time, the impeller of the range hood and the flame-retardant pipe of the exhaust fan will adhere to a large amount of oil and increase the weight of the impeller, so it inevitably increases the rotating kinetic energy of the fan wheel and the starting current of the motor.

　　油烟机与杨燃烧风道长期积存的油液，也会形成火灾隐患。叶轮,增加粘性油阻燃管,排气不光滑,塇来烟在厨房空间的传播,危害人们的健康。

　　The long-term accumulation of oil in the fume hood and poplar combustion duct will also cause fire hazards. Impeller, increase viscous oil flame-retardant pipe, unsmooth exhaust, the spread of smoke in the kitchen space, endangering people's health.