Fogging prevention system for windscreen of motor vehicle, has control device controlling ventilating device, and temperature sensor detecting temperature of windscreen and arranged at region of exhaust nozzle

摘要

The system (1) has a dew-point determining device for determining dew-point temperature of air by measuring values of a temperature sensor (4) and a moisture sensor (5). The air is exhausted from an exhaust nozzle (3) in a direction of a windscreen (2). A control device controls a ventilating device when a threshold value falls below a difference between temperature of the windscreen and the dew-point temperature. The temperature sensor detects the temperature of the windscreen and is arranged at a region of the exhaust nozzle.