Draft inducer air flow control
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United States of America Patent
Stats
-
May 23, 1995
Grant Date -
N/A
app pub date -
Feb 26, 1993
filing date -
Feb 26, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control circuit for a motor driving a fan for inducing a draft in the exhaust of a heating, ventilating and air conditioning (HVAC) system. The control circuit may be used in conjunction with either a variable pressure sensor or one or two discrete pressure sensors. A controller receives information defining the pressure set point. The information may be from a switched register or low or high pressure input signals. The motor speed/torque is increased until the pressure set point is reached.
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