US 5,349,721 AGranted

Fan apparatus

AssigneeKioritz Corporation

InventorYosikazu Iida

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Abstract

A fan apparatus capable of preventing problems which can be caused during the rotation of a fan rotor, and also capable of facilitating the mounting and dismounting of a suction port cover. The suction port cover removably provided on the same side of the apparatus as an air suction port includes a bell-mouth shaped member for guiding air being sucked into the air suction port in such a manner that air is introduced from the side of the cover, the inner surface of the bell-mouth shaped member defining a first suction passage. A blind patch member is disposed in the space defined by the outer surface of the bell-mouth shaped member with a gap between the blind patch member and an outer surface of the bell-mouth shaped member so that a second suction passage is defined therebetween.

Claims2

Dependent claims

A fan apparatus comprising:

a volute casing;
a fan rotor rotatably arranged in said volute casing;
an air suction port having a first bell-mouth on said casing for said fan rotor;
and an air suction port cover removably provided outside of said volute casing at said air suction port,
said air suction port cover comprising:
a bell-mouth shaped member having a second bell-mouth with an arc shaped cross section and formed with an inner bell-mouth surface and an outer bell-mouth surface for guiding air being sucked into said casing through said air suction port in such a manner that air is introduced from a radial side of said air suction port cover, said inner bell-mouth surface defining a first suction passage between said first bell-mouth;
and a blind patch member disposed in the space defined by said outer bell-mouth surface with a gap between said blind patch member and said outer bell-mouth surface of said bell-mouth so that a second suction passage is defined therebetween.

4 more elements

Dependencies are inferred from the claim text.