| 摘要 |
The present invention relates to a noise reduction duct which cuts a part having a heavy noise in a flow tube installed in advance, and can simply replace the cut part. The noise reduction duct comprises: an inner layer having a curve formed in a flowing direction or a circumference direction of a fluid; a buffer layer formed in an outer surface of the inner layer; and an outer layer formed in the outer surface of the buffer layer. The inner layer is flexible, and can be shaken in the flowing direction or the circumference direction due to the flow of the fluid. The curve can be modified due to the flow of the fluid. The shaking of the inner layer and the modification of the curve are buffered by the buffer layer. |
