| 摘要 |
A drain tube of a muffler is provided to discharge condensate effectively by extensively forming a drain tube to face a ground surface of a muffler case at an outer circumference of a discharge pipe outlet side of the muffler. A drain tube of a muffler includes a drain tube(10) and a spiral condensate flow groove(11). The drain tube is formed on a discharge pipe(5) of a muffler case(1) toward a bottom surface of the muffler case. Condensate collected in the muffler case is discharged through the drain tube due to exhaust pressure. The spiral condensate flow groove is formed on a body of the drain tube so that the condensate is rotated and raised to be discharged to the outside of the muffler case.
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