Airflow control system

Details Airflow control system Airflow control system

F - Mech Eng,Light,Heat,Weapons

04

D

342/37, 341/38

F04D 27/00 (2006.01) F04D 15/00 (2006.01) F04D 27/02 (2006.01) H02P 25/20 (2006.01)

Patent

CA 1217260

ABSTRACT OF THE DISCLOSURE An airflow control system comprising a blower provided within the air passage, a pole change motor driving the blower, a damper provided within the air passage, and means for changing the motor speed by changing the number of poles of the motor, wherein the pole change operation takes place following the adjustment of the damper.

459988

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