Patent ID: 8157513
Filing Date: 2012-04-17
Classification: F04D

Abstract:
1. An axial flow fan comprising: an impeller rotatable about a central axis and including a plurality of blades: a hollow member accommodating therein the impeller; a base portion arranged at the hollow member and supporting the impeller in a rotatable manner; a plurality of inner air guide members each connected to the base member; a plurality of outer air guide members each connected to the hollow member; and a connecting member having an axial height measured between an axially uppermost edge portion and an axially lowermost edge portion, the connecting member being arranged to connect the inner air guide members and the outer air guide members; wherein the inner air guide members and the outer air guide members each include a first edge portion that is an axially uppermost edge portion and a second edge portion that is an axially lowermost edge portion; an axial height of the outer air guide member measured between the first edge portion and the second edge portion thereof is equal to or greater than an axial height of the inner air guide member measured between the first edge portion and the second edge portion; an axial height of the outer air guide member measured between the first edge portion and the second edge portion thereof is equal or substantially equal to the axial height of the connecting member; and an axial height of the inner air guide member measured between the first edge portion and the second edge portion thereof is shorter than an axial height of the connecting member.