| 摘要 |
PROBLEM TO BE SOLVED: To decrease generation of noise using simple constitution. SOLUTION: In an air supply device, having an axial flow fan 3, a supply guide 7 positioned opposite to an air outlet 5 with a distance and provided in an upper part with an opening part 8, is situated at the air outlet 5 of the axial flow fan 3, and a wall surface 7a opposed to the air outlet 5 of the supply guide 7 consists of a resonance-type sound absorption panel 9 having number of air flow ports 10, 10, etc., through which supply air flows and resonance chambers 11, 11, etc., where noise passing through the air flow ports 10, 10, etc., resonates. Most of air w1 supplied through the air outlet 5 is guided by the supply guide 7 and discharged in a decelerated state through the opening part 8. Meanwhile, a part of air w2 supplied through the air outlet 5 is reduced in noise through vent sound insulation at a process, where it passes through the air flow ports 10, 10, etc., and resonance at the resonance chambers 11, 11, etc. |
