Automatic temperature and humidity regulation – Hot-air furnace – Air and fire control
Patent
1988-04-22
1989-06-27
Wayner, William E.
Automatic temperature and humidity regulation
Hot-air furnace
Air and fire control
110186, 110190, 318806, 417 63, 388910, 388917, 388934, F23N 518, F04B 2100
Patent
active
048421901
ABSTRACT:
A control circuit for a forced-air heating system comprises a silicon diode that is positionable in thermally-conductive relationship with the interior space of a furnace plenum. A current source supplies current to the silicon diode, and the potential drop across the silicon diode is sensed. The operating speed of the blower is controlled in response to the voltage drop across the silicon diode in a manner such that when the temperature in the plenum is below a first level, the blower is not driven; when the temperature reaches the first level, the blower is driven at a first speed; and when the temperature reaches a second level, which is higher than the first level, the blower is driven at a second speed, which is higher than the first speed.
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Ortech Industries, Inc.
Wayner William E.
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