| 摘要 |
An axial fan comprising an essentially circular-cylindrical blower pipe configured about a centre axis and comprising one or more plates that are bent and subsequently joined at opposing plate rims for forming the circular-cylindrical blower pipe; and wherein the circular-cylindrical blower pipe has two opposing ends; wherein the blower pipe is, at both its ends, bent outwards essentially at right angles to the outside of the blower pipe for forming a mounting flange. The blower pipe comprises a rust-resistant metal plate or a steel plate which is coated with a rust-resistant material at least on the outside and the inside of the blower pipe; and in that the plate rims are joined in a rim-by-rim manner, without overlap, by soldering or welding with a rust-resistant filler material. |
