Patent ID: 7748948
Filing Date: 2010-07-06
Classification: F04D

Abstract:
1. A vortex-flow blower device comprising: an impeller having a plurality of fins; a blower housing that has a fluid inlet port for introducing a fluid therein, a fluid outlet port for discharging the fluid, and a vortex flow chamber that accommodates the impeller and extends from a vortex start point on a side of the fluid inlet port to a vortex end point on a side of the fluid outlet port along the plurality of fins; a partitioning portion that blocks a communication between the vortex end point and the vortex start point in the vortex flow chamber; and a thermal fuse that is molded as an integral part of the blower housing from a common resin material, which is common to both the thermal fuse and a remainder of the blower housing, wherein: the thermal fuse is configured as a recess that is recessed from a surface of an adjacent area of the blower housing, which is adjacent to the thermal fuse, so as to have a thin wall with a wall thickness that is less than a wall thickness of the adjacent area of the blower housing; and the thermal fuse is adapted to be fused by a temperature rise so as to discharge the fluid on the side of the outlet port to an outside when the thermal fuse is fused.