ZONING INTERFACE SYSTEM FOR A VARIABLE SPEED HEAT PUMP

摘要

A heating and cooling system (10) that provides interfacing between multiple zones in the system (10) and a variable speed heating and/or cooling device, such as a heat pump. The heating and cooling system (10) includes a master zone control circuit (30) that includes a master thermostat (32) for controlling a master zone. The setting of the master thermostat (32) determines whether the heating and cooling system (10) will be in the heating or cooling mode. A plurality of auxiliary zone control circuits (50) include separate auxiliary thermostats (52) for controlling the auxiliary zones. Each of the master control circuit (30) and the auxiliary control circuits (50) provide an output signal whether the particular zone is operating in the currently activated system mode of heating or cooling. An interface device (80) is responsive to all of the output signals from the master control zone and the auxiliary control zones so as to determine which of the zones has the highest demand for heating or cooling. The interface device (80) then provides an output signal to the heating and/or cooling device to establish a particular air flow rate and temperature of the system (10) to satisfy the demand for the highest load zone.