Airflow control system

Details Airflow control system Airflow control system

1987-02-13

1988-11-15

Croyle, Carlton R.

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

417300, 417 12, 417 28, 417 45, 318773, 236 15BD, F04B 4900

Patent

active

047845805

ABSTRACT:
An airflow control system generates a compensating output which is combined with the normal damper control output in a damper operating device when a pole change motor driving a blower changes speed so that the damper is changed to compensate for the change in blower speed to avoid a large change in airflow. This overcomes the delay in the normal integrating damper control which produced unwanted fluctuation in airflow when the motor speed was changed.

REFERENCES:
patent: Re28946 (1976-08-01), Martz et al.
patent: 2482597 (1949-09-01), Ritter
patent: 2707440 (1955-05-01), Long et al.
patent: 2741986 (1956-04-01), Smith
patent: 4181099 (1980-01-01), Binstock
patent: 4225289 (1980-09-01), Burkett
patent: 4370605 (1983-01-01), Breznican
patent: 4462217 (1984-07-01), Fehr
patent: 4468171 (1984-08-01), Katsumata et al.

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