Appeal No. 1999-0316
Application 08/329,124
supplying cooled air. The hot deck includes a heating coil 22
and the cold deck includes a cooling coil 30. Pressure
sensors 23, 24 on either side of the heating coil and pressure
sensors 31, 32 on either side of the cooling coil contribute
to the generation of signals representative of the volumes of
air flowing through the hot and cold decks. These signals are
utilized to minimize heating and cooling costs by controlling
the relative amounts of outdoor (fresh) and return (exhaust)
air in, and thus the temperature of, the air mix supplied to
the decks.
According to the examiner, it would have been obvious at
the time the invention was made to a person having ordinary
skill in the art to
employ in Hajicek in the first air stream . . .
first and second pressure taps across the first heat
exchanger and in the second air stream . . . third
and fourth pressure taps across the second heat
exchanger in order to determine the air flowrate
within the first and second air streams for the
purpose of controlling the air temperature as
disclosed in Spethmann [supplemental answer, page
6].
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