电子舱通风进气出口门开关度

天使痴绝 · 发表于 2019-6-9 17:41:26

做航前或者短停经常发现进气门和排气门全关闭，但是机型手册上面写在地面是全开状态。况且没有暴雨，沙尘暴等恶劣天气，温度都远远大于9度。而且也没有人超控鼓风扇和排风扇。请问这是什么情况。很郁闷呢！

来自苹果APP客户端

acass · 发表于 2019-6-10 15:10:24

蒙皮温度传感器大于11度？

来自苹果APP客户端

天使痴绝 · 发表于 2019-6-10 15:44:41

acass 发表于 2019-06-10 15:10
蒙皮温度传感器大于11度？

当时外界温度24度左右！

来自苹果APP客户端

始于哀 · 发表于 2019-6-10 22:45:48

Avionics Ventilation
GENERAL
The system is automatically controlled by the Avionics Equipment Ventilation Computer (AEVC) and no crew action is required. The AEVC will change the system configuration depending on whether the A/C is on ground or in flight and on A/C skin temperature.NOTE: The BLOWER and EXTRACT P/Bs must be in AUTO position.
OPEN CIRCUIT CONFIGURATION
In open circuit configuration, ambient air drawn through the skin air inlet valve by the blower fan, is blown into the system. The air, after cooling the avionics equipment, is drawn by the extraction fan directly overboard. The open circuit configuration allows avionics equipment to be cooled with ambient air under certain conditions. (On ground and skin temperature above 12°C (53,6°F) increasing, or above 9°C (48,2°F) decreasing).
NOTE: The skin air inlet and outlet valves are fully open.
CLOSED CIRCUIT CONFIGURATION
In closed circuit configuration, the extracted avionics equipment air goes through the skin exchanger isolation valve into the skin heat exchanger to be cooled. Then this air is blown into the avionics equipment again. The skin exchanger inlet bypass valve is controlled by the AEVC in accordance to the system configuration to discharge the air under the FWD cargo compartment. The skin exchanger outlet bypass valve opens in order to decrease the noise level in the avionics bay.

PARTIALLY OPEN CIRCUIT CONFIGURATION
In partially open circuit configuration, the system is almost like in closed configuration, part of the extracted air is expelled overboard.
NOTE: The skin air outlet valve is an electrically operated single flap valve with a smaller flap built into it. This smaller flap is opened in flight or on ground with takeoff power selected, when the skin temperature is above 35°C (95,0°F). It returns to the closed position when the skin temperature decreases below 31°C (87,8°F).