초록 ▼

A control system for controlling a heating system having a heat pump and a source of supplemental heat. 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 shu

A control system for controlling a heating system having a heat pump and a source of supplemental heat. 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. The heat pump is also shut down if the outside ambient temperature falls below a certain level and is automatically reenabled is the outside ambient exceeds a second level. The system results in more efficient operation of the heat pump/supplemental heat system by disabling the heat pump when weather conditions do not favor efficient heat pump operation.

대표청구항 ▼

A method of controlling a heating system having a supplemental heat source and a heat pump for supplying heat to an interior space, wherein the heating system includes a thermostat mechanism that activates the heat pump and supplemental heat source in response to ambient temperature sensed by the th

A method of controlling a heating system having a supplemental heat source and a heat pump for supplying heat to an interior space, wherein the heating system includes a thermostat mechanism that activates the heat pump and supplemental heat source in response to ambient temperature sensed by the thermostat, said method comprising: sensing when the heat pump is in a defrost cycle, calculating a value representing the portion of its cyclically recurring heating cycle during which the heat pump is in its defrost cycle, and disabling the heat pump when the defrost portion value exceeds a predetermined value representative of a given percentage of a given cyclically recurring heating cycle.