| 摘要 |
PURPOSE: A noise reducing structure of a drain pipe is provided to reduce frictional noise of draining water by forming an air layer between the drain pipe and a noise absorbing member. CONSTITUTION: A transverse branch pipe(30) is connected to a sleeve(10) through an elbow pipe(20). The transverse branch pipe(30) is also connected to a drainage system. A noise absorbing member(50) is formed in the sleeve(10) by interposing an air layer(40) therein. The sleeve(10) is integrally formed with a connection point formed between the elbow pipe(20) and the transverse branch pipe(30). The air layer(40) absorbs the frictional noise of water when water is dropped from the pipe. The noise absorbing member(50) is integrally formed with the connection point formed between the elbow pipe(20) and the transverse branch pipe(30), so the vortex flow is not generated at a bending portion of the elbow pipe(20).
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