초록 ▼

A control system for controlling a heating system having a heat pump and a source of supplemental heat. The indoor heat exchanger temperature is monitored, such as by a thermocouple or the like, and when the temperature falls below a given threshold level, defrost cycling of the heat pump is initiat

A control system for controlling a heating system having a heat pump and a source of supplemental heat. The indoor heat exchanger temperature is monitored, such as by a thermocouple or the like, and when the temperature falls below a given threshold level, defrost cycling of the heat pump is initiated. The control system monitors the defrost cycling of the heat pump, and when the heat pump is in its defrost cycle for more than a predetermined portion of a heating cycle, the heat pump will be shut down until the outdoor ambient temperature has risen by a predetermined amount or a given interval of time has elapsed.

대표청구항 ▼

A heating system comprising: supplemental heating means for supplying heat to an interior space, heat pump means for supplying heat to the interior space, said heat pump means for comprising an indoor heat exchanger in thermal contact with the interior space, control means including at least one the

A heating system comprising: supplemental heating means for supplying heat to an interior space, heat pump means for supplying heat to the interior space, said heat pump means for comprising an indoor heat exchanger in thermal contact with the interior space, control means including at least one thermostat having a sensor in the interior space for activating one or both of said supplemental heating means and said heat pump means into operation, a thermal sensor in thermal contact with said indoor heat exchanger, defrost control means connected to said thermal sensor and said heat pump means and responsive to indoor heat exchanger temperature for causing said heat pump means to go into its defrost mode when the indoor heat exchanger temperature falls below a preset threshold temperature, and heat pump control override means connected to said defrost control means for detecting when said heat pump means is in its defrost mode and disabling said heat pump means from operating in its heating mode when the heat pump means is detected as operating in its defrost mode for a predetermined portion of a given cyclically recurring time interval.