| CPC F04D 29/441 (2013.01) [B60N 2/565 (2013.01); F04D 17/16 (2013.01); F04D 25/08 (2013.01); F04D 29/4226 (2013.01)] | 3 Claims |
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1. A centrifugal air blower comprising a case body that accommodates therein a centrifugal fan and a motor adapted to rotary drive the centrifugal fan, and configured to draw in air in an axial direction from of the case body and discharge air from a radial-direction side surface of the case body, wherein
the case body comprises:
a first case configured to be assembled to cover the centrifugal fan and provided with an intake opening part at a radial-direction center part and an annular first air blowing path formed at a radial-direction outer side; and
a second case comprising, at an outer circumferential side of a bottom plate configured to axially support the motor to be rotatable, an annular second air blowing path formed on a radial-direction outer side of an outer-circumferential end part of the centrifugal fan, the second air blowing path being configured to be assembled with the first air blowing path,
a dome-shaped space part formed on an opposite surface side to the intake opening part by a hub and a main plate continuing thereto of the centrifugal fan accommodates the motor in such a manner as to overlap in the axial direction, and
an exhaust port is provided to a radial-direction side surface of the second case while being partitioned by a diffuser, the diffuser being coupled to the bottom plate an annular opening end part, the diffuser includes a plurality of diffuser panels formed upright at the bottom plate at a given interval, and in plan view of an inner surface of the second case, the diffuser panels are each coupled to the opening end part in such a manner as to be formed upright in an arc-like shape from a radial-direction inner side to a radial-direction outer side of the bottom plate while having gradually increasing height, the bottom plate forming the second air blowing path.
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