| 摘要 |
PURPOSE:To automatically prevent moisture from collecting on the front window glass by increasing the supply rate of air from the defrostor outlet when a difference between the interior air temperature and the set temperature is increased over a certain value. CONSTITUTION:Information of a car's room temperature 21, an open air temperature 22, a set temperature 23, a damper opening 24, a cooler's temperature 25 and a heater's temperature 25 is inputted into a digital computer 20a via an analogue I/O interface 10b. In conformity to the temperature control routine and the supply rate control routine, a computer 10a executes arithmetic operation on the information to control a solenoid valve 31 which shuts off the driving force from an engine EG to a cooling cycle CC, a solenoid valve 32 which shuts off the cooling water passage toward a heater 5, an interior and open air damper 2, a temperature controlling damper 7, and negative pressure actuators 33, 34 and 35a-35c for driving outlet dampers 8a-8c. The computer is programmed such that if a difference between the interior and the open air temperature is shown over a certain value, the damper 8c may be opened by the actuator 35c, whereby moisture collection on the glass may be automatically prevented. |
