CPC F04D 29/4246 (2013.01) [F04D 29/28 (2013.01); F04D 29/42 (2013.01); F04D 29/4213 (2013.01); F04D 29/4226 (2013.01); F04D 29/44 (2013.01); F04D 17/10 (2013.01)] | 2 Claims |
1. A centrifugal blower including 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 from a radial-direction middle part of the case body and discharge compressed air from a radial-direction outer side of the case body, wherein
the case body includes:
a first case configured to be assembled to cover the centrifugal fan, and provided with an intake opening part at a radial-direction middle part, and a first air blowing path formed at a radial-direction outer side; and
a second case configured to axially support the motor to be rotatable, and provided with a second air blowing path formed on a radial-direction outer side of an outer-peripheral end part of the centrifugal fan, the second air blowing path being configured to be combined with the first air blowing path, and
lock protrusions are projectingly provided to a peripheral edge part of the intake opening part of the first case at a plurality of positions, a removal hole of which a width becomes narrower from an upstream side to a downstream side in a rotational direction of the centrifugal fan is provided to extend on a radial-direction outer side of each lock protrusion, and a chamfered inclined surface is formed to continue to a peripheral edge part of the removal hole, the peripheral edge part facing to an inner wall surface of the first case.
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