Dual reverse fan

Abstract

The dual-reverse fan 1 includes: a plurality of rotating bodies 200, each having an impeller 202; a plurality of housings 100 arranged along the rotation axis of the rotating bodies, each rotatably housing one of the plurality of rotating bodies; and a connecting member 300 connecting the plurality of housings. Each of the plurality of housings includes: a cylindrical outer wall portion 110 having an inner circumferential surface 110a; a bottom 120 located radially inside the inner circumferential surface; a connecting portion 130 connecting the bottom and the outer wall portion; and a connecting portion 142 located radially outside the connecting portion of the outer wall portion relative to the connection point between the outer wall portion and the connecting portion. The connecting portions of the plurality of housings face each other in the rotation axis direction, and the plurality of connecting portions are connected by the connecting member.

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