US 4,364,512 AGranted

Zone heat control

OwnerThomas R. Morrisoninventor

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Abstract

Each heating zone in a structure includes a thermostat controlling a valve feeding one or more heat delivering devices in a heat controlled zone in a structure. A controller periodically attempts to flow a fluid through the control valves and a flow sensor determines whether or not the attempt is successful. If the attempt is unsuccessful, indicating that all control valves are closed, the controller terminates the attempt to flow fluid. If the attempt is successful, indicating that one or more of the control valves are opened by their respective thermostats, the controller provides the circulation of heated fluid therethrough which results in the delivery of heat into the temperature controlled zones. When the last temperature controlled zone has received sufficient heat to cause its control valve to turn off, the flow sensor, sensing this condition, produces a signal which causes the controller to discontinue the flow of fluid.

Claims8

Dependent claims

A heating control system for a structure having at least first and second heated areas comprising:

a first heat delivering device in said first heated area;
a second heat delivering device in said second heated area;
a furnace;
means for delivering heated fluid from said furnace to said first and second heat delivering devices;
first means for controlling delivery of said heated fluid to said first heat delivering device in response to a first temperature in said first heated area, said first means for controlling delivery having an open, condition in response to said first temperature being below a first predetermined value and a closed condition in response to said first temperature being above said first predetermined value;
second means for controlling delivery of said heated fluid to said second heat delivering device in response to a second temperature in said second heated area, said second means for controlling delivery having an open condition in response to said second temperature being below a second predetermined value and a closed condition in response to said second temperature being above said second predetermined value;
means for periodically attempting to flow a fluid through said first and second means for controlling delivery;
means for sensing flow of said fluid to said first and second means for controlling delivery;
and
means for energizing said means for delivering and said furnace as long as a predetermined flow of said heated fluid, indicative of at least one of said first and second means for controlling delivery being in its open condition, is sensed by said means for sensing flow.

7 more elements

Dependencies are inferred from the claim text.