To provide a multiblade impeller structure capable of easily designing a multiblade impeller of a multiblade blower requiring relying-on-experiment conventionally and realizing the multiblade impeller capable of achieving high efficiency and reducing noise.
In this multiblade impeller structure constituted by arranging many blades along the axial direction at a fixed interval in the circumferential direction on a common circumferential face, supporting one ends of these many blades by a main plate connected with a rotary shaft, and supporting the other ends of many blades by an annular auxiliary plate to inject air taken into through a suction port of the annular auxiliary plate from around many blades, the sum of an inlet angle β1 formed by tangential line vector of circumference formed by an air taking-in side of the blade 2 and the air taking-in side of the blade 2 and an outlet angle β2 formed by tangential line vector of circumference formed by an air blowing-out side of the blade 2 and the air blowing-out side of the blade 2 is set in a scope of 200 to 240 degrees.
COPYRIGHT: (C)2007,JPO&INPIT
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Arihara Koichi
Matsushima Tetsuo