| 摘要 |
PROBLEM TO BE SOLVED: To reduce the kinds of components by simplifying ducts and to make air volumes of blowout ports approximately equal to each other. SOLUTION: In this duct structure wherein main pipe ducts 2 are branched from a main duct 1, and branch pipe ducts 3 are branched from the main pipe duct 2 and respectively provided with the blowout ports 5 at tip ends, tip end parts 2b of the main pipe ducts 2 are communicated with each other to form a loop duct. As the air is accumulated in the tip end parts 2b of the main pipe ducts to be acted as a kind of chamber, the air volumes of the main pipe ducts 2 arranged in parallel with each other can be equalized. As the air volumes can be increased a little by acquiring the static pressure again after the air is passed through the branch parts to the branch pipe ducts 3, when diameters of the main pipe ducts 2 are equalized to each other, the air volume as a whole can be equalized, and the kinds of the components can be reduced. Further the pressure loss can be reduced in response to the increase of a wind speed by applying the main pipe ducts of the uniform diameter, by increasing a radius of curvature of a bent part to a flange 16 mounted on a connecting part with the branch pipe 10, and mounting an air guide plate 15 to the branch pipe duct 3 in the branch pipe 10 at end parts of the branch pipe ducts 3. COPYRIGHT: (C)2005,JPO&NCIPI
|
