CAR HEATER OPERATION CONTROL SYSTEM Russian patent published in 2004 - IPC

FIELD: transport engineering; microclimate control systems.

SUBSTANCE: proposed system includes piping system, large and small cooling liquid circulation circuits, heater radiator and heater radiator electromagnetic valve, both placed in small cooling liquid circulation circuit, and control circuit including temperature setter, air temperature transmitter, comparison circuit and electromagnetic valve power control switch. First output of temperature setter is connected with first input of comparison circuit, output of comparison circuit is connected with control input of power switch, and its first power output is connected with power bus of supply source, and second power output is connected with first output of electromagnetic valve winding whose second output is connected with second power bus of supply source. System is furnished additionally with controllable multivibrator, second power switch and second winding of electromagnetic valve. Output of comparison circuit is connected with control input of second power switch, first power output of which is connected with power bus of supply source, and second power output is connected with first output of second winding of electromagnetic valve. Second output of said winding is connected with second power bus of supply source.

EFFECT: improved accuracy of maintenance of temperature of air supplied by heater, fan, improved reliability of operation of electromagnetic valve and reduced overall dimensions.

1 dwg