Automatic temperature and humidity regulation – Hot-air furnace – Air and fire control
Reexamination Certificate
2007-11-13
2007-11-13
Ciric, Ljiljana (Department: 3744)
Automatic temperature and humidity regulation
Hot-air furnace
Air and fire control
C236S01500E, C165S267000
Reexamination Certificate
active
11080773
ABSTRACT:
A heating or cooling system, such as an HVAC system, of variable output has a number of control elements and may include a variable speed compressor, a variable speed combustion (induced or forced draft) blower motor; a variable speed circulator blower motor; a variable output gas valve or gas/air premix unit; and a controller specifically developed for variable output applications. The system may utilize a pressure sensor to determine the actual flow of combustion airflow in response to actual space conditions, vary the speed of the inducer blower, and subsequently vary the gas valve output to supply the correct amount of gas to the burner system. A temperature sensor may be located in the discharge air stream of the conditioned air to provide an input signal for the circulator blower.
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Lutton Larry L.
Ratz James W.
Sigafus Paul E.
Torborg Ralph H.
Ciric Ljiljana
Pauley Petersen & Erickson
Varidigm Corporation
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