公开(公告)号：US09759219B2

公开(公告)日：2017-09-12

申请号：US14597881

申请日：2015-01-15

Applicant: ABB OY

Inventor： Jari-Petri Tiainen ,  Niko Björkman ,  Johannes Pylvänen

IPC: F04D17/16 ,  F04D25/16 ,  F04D29/42

CPC classification number: F04D17/162 ,  F04D17/16 ,  F04D25/166 ,  F04D29/4226

Abstract: A fan apparatus is disclosed having a first fan and a second fan, both of which are centrifugal fans. Impellers of the first fan and the second fan can be located adjacent one another and adapted to rotate in opposite directions. A first outlet opening (ot1) provided on a housing of the first fan can be located relative to a second outlet opening (ot2) provided on a housing of the second fan such that a flow pattern of the first fan overlaps at least partially with a flow pattern of the second fan when viewed from a direction of a rotation axis of an impeller of the first fan.