Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1988-02-22
1989-12-12
Ford, John
Heat exchange
Movable heating or cooling surface
Rotary drum
165 27, 165 25, 236 1B, 236 1C, 236 68B, 236 1EB, 236 491, F24F 3048, F25B 2900
Patent
active
048861103
ABSTRACT:
An HVAC system for a plurality of zones comprising an air handling unit including a blower, a plurality of heating stages and a plurality of cooling stages. The air handling unit is connected via ducts to each of the zones, each zone having an air outlet provided with a two-position damper which is either open or closed and a thermostat for providing an input signal to a microprocessor. The microprocessor has outputs for activating motors to move the dampers and outputs for activating the heating and cooling stages. The system includes an automatic mode of operation in which the microprocessor controls the number of stages of heating or cooling which are energized in dependence on the difference between the number of zone therostats calling for heating and the number of zone thermostats calling for cooling.
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Ford John
Valera Electronics Inc.
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