| 摘要 |
PROBLEM TO BE SOLVED: To improve the air blowing performance of a centrifugal fan in an air conditioning device in which the centrifugal fan including backward curved blades is provided while a rotating shaft faces opening directions of a fan inlet and a discharge port in a fan chamber formed in such a manner that the fan inlet is opposed to the discharge port.SOLUTION: An impeller (51) comprises a hub (54) that connects end parts of a plurality of backward curved blades (53) on the side of a discharge port (12) and that rotates around a rotating shaft (52). The outside diameter of the hub (54) is smaller than the outside diameter of the backward curved blades (53). |
