TEMPERATURE CONTROL APPARATUS EMPLOYING HEATING AND COOLING CONTROL CIRCUITS ARRANGED IN A HEAD TO TOE CONFIGURATION

摘要

The present system is a time proportional system for controlling both heat and cooling. The present system provides a plurality of stages of individual heating control circuits and a plurality of stages of individual cooling control circuits. The system in general follows a last on-first off procedure. The ascending stages of the heating series are respectively circuitry connected to the descending stages of the cooling series, i.e., the first stage of the heating series is connected to the last stage of the cooling series and vice versa so that when a heating stage is turned on it will cause the cooling stage to which it is connected to be turned off and vice versa. Because of the head to toe arrangement the present system can employ both heating and cooling stages simultaneously when the conditions warrant such an arrangement.