CAR INTERIOR HEATING AND VENTILATION SYSTEM Russian patent published in 2006 - IPC B60H1/04 

FIELD: transport engineering; car heating and ventilation system.

SUBSTANCE: proposed car interior heating and ventilation system contains system of pipelines, and large and small cooling liquid circulation circuits. Fan, electric fuse, heater cock and radiator are placed in small cooling liquid circulation circuit. System is furnished also with pulse-width modulation circuit containing pulse-width modulator and variable regulating resistor. System employs also thermal resistor, capacitor, first diode, second diode, power switch on n-shaped metal-oxide semiconductor transistor.

EFFECT: simplified design, reduced cost of system at preservation of stepless control of heater fan speed without reducing efficiency.

2 dwg