US 12,188,484 B2
Centrifugal blower
Masahiko Uni, Nagano (JP)
Assigned to SHINANO KENSHI KABUSHIKI KAISHA, Nagano (JP)
Filed by SHINANO KENSHI KABUSHIKI KAISHA, Nagano (JP)
Filed on Dec. 7, 2023, as Appl. No. 18/532,688.
Claims priority of application No. 2023-002041 (JP), filed on Jan. 11, 2023.
Prior Publication US 2024/0229824 A1, Jul. 11, 2024
Int. Cl. F04D 29/42 (2006.01); F04D 17/10 (2006.01); F04D 29/28 (2006.01); F04D 29/44 (2006.01)
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
OG exemplary drawing
 
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.