| 摘要 |
PURPOSE:To promptly open doors of air-conditioner for a car which opens or closes each wind distribution door by shifting the door used for any differential unit in the opening direction by means of a negative pressure actuators for an air distribution damper put into communication with the atmospheric side and the others in the closing direction through a delayed operation valve. CONSTITUTION:When a selector valve 42 for a differential unit is transferred to position (a), a rod 29a is projected by means of energizing force of a spring 32 so as to communicate with the atmospheric side and a differential door 23 is opend. At the same time, either a selector valve 40 or 41 is positioned at (a) and a negative pressure actuator 30 or 31 is put into communication with the atmospheric side. When a room door 24 or a bent door 25 is closed, there is a leakage of air, little by little, from small holes 51, 52 in such a condition as a valve body 48 of a delayed operation valve 43 or 44 closes down an opening port 46 on the actuator side, so a door is closed slowly. Accordingly, a great volume of wind flows out from instrument duct 22 or a floor duct 20, and wind pressure working on differential door 23 is lowered so that it may open promptly. |
