Storage heater with two point thermostatic switching - has operational amplifier with phase control of solid state switching module

摘要

A storage heater system has a thermostatic control and two point temp. regulation. The speed of the ventilator motor at normal operation of the storage heater is regulated as a function of the temp. The single control circuit is also capable of switching in a booster heater. The system consists of an operational amplifier with a change-over switch and a phase control module for a solid state switch. The amplifier is controlled by signals derived from the actual and from the reference temperatures. The phase trigger control module controls the ventilator motor and the change-over switch controls the booster heater via a relay.