风管主要指中央空调系统的通风管道，它常常被忽视，但却是空调系统的重要组成部分。风管是由薄钢板、铝板、硬聚氯乙烯板、玻璃钢以及其它复合材料等制成的，用于输送空气和空气混合物的各种管道的总称。

The air duct mainly refers to the ventilation pipe of the central air conditioning system, which is often neglected, but it is an important part of the air conditioning system. The wind pipe is made of thin steel plate, aluminum plate, hard polyvinyl chloride plate, glass steel, and other composite materials. It is used as the general name of various pipes for conveying air and air mixture.

1、按照材质可分为：

1. According to the material, it can be divided into:

金属风管、非金属风管。其中：

Metal wind pipe, non-metallic wind pipe. Among them:

（1）金属风管又可分为：

(1) the metal wind pipe can be divided into:

钢板风管、铝板风管、不锈钢风管等；

Steel plate air duct, aluminum plate air duct, stainless steel air pipe and so on.

（2）非金属风管可以分为：

(2) the non-metallic wind pipe can be divided into:

硬聚氯乙烯风管、有机玻璃风管、无机玻璃风管、玻璃钢风管以及其它复合材料风管等；

Rigid polyvinyl chloride air pipe, plexiglass air duct, inorganic glass wind pipe, FRP air duct and other composite air pipes.

2、按照风管外形可分为：

2. According to the shape of the wind pipe, it can be divided into:

圆形风管、矩形风管；

Circular wind pipe, rectangular wind pipe;