THERMOSTAT ELECTRONIQUE A EFFET PROPORTIONNEL POUR HABITACLE DE VEHICULE AUTOMOBILE A CHAUFFAGE PAR FLUIDE LIQUIDE

摘要

The electronic regulator operates on an electrovalve (1) in the heater radiater circuit. The value of a temp. sensitive resistor (2) detecting temp. in the vehicle is compared with a demand value set by a potentiometer (4) in a comparator (6). The comparator is controlled from a ramp generator (7) to provide time durations to suit the quality of temp. regulation and the electrovalve characteristics. - A zener diode (13) circuit provides protection for the stabilised power supply (5) and potentiometer and comparator circuits. The comparator output drives the valve via a power transistor (10) after validation by an overvoltage detector (9). (1)