Counter-rotating axial-flow fan

Details Counter-rotating axial-flow fan Counter-rotating axial-flow fan

2011-01-18

2011-01-18

Nguyen, Tran N (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S062000, C310S089000, C415S068000, C415S199500

Reexamination Certificate

active

07872381

ABSTRACT:
A counter-rotating axial-flow fan is provided that is capable of increasing effect of cooling a stator. One or more through-holes83penetrating support frame bodies (21, 75) in the axial direction are formed in support frame bodies21and75. One or more vent holes57afor introducing air, sucked from a suction port19, into a cup-like member51are formed in a bottom wall portion57of a cup-like member51of a first impeller9. One or more vent holes111afor discharging air, introduced into an internal space of a second motor61, to the outside are formed in a bottom wall portion111of a cup-like member105of a second impeller63.

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