| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an air conditioning duct capable of effectively reducing air conditioning noise generated in a vehicle room in accordance with operation of an air conditioning system. <P>SOLUTION: In this air conditioning duct 10, a lead-in part 12 and a lead-out part 16 are connected through a fiber duct part 14 having ventilation property and made of woven fabric. Since the fiber duct part 14 is set to have proper ventilation amount, sound wave generated in accordance with operation of an air conditioning blower can escape to the outside effectively through a pipe wall in this air conditioning duct 10. For this reason, columnar resonance does not occur easily inside the air conditioning duct 10. Consequently, since resonance of the pipe wall does not occur easily, air conditioning noise generated in the vehicle room is favorably reduced to ensure silence in the vehicle room satisfactorily. <P>COPYRIGHT: (C)2004,JPO |
