| 摘要 |
The invention provides an improved drain valve for dew condensation in an air chiller unit mounted on an aircraft. The drain valve 160 attached to a drain of a drain pan in an air chiller unit is equipped with a valve seat member 162 having an opening 162 a at the center and a valve member 164 disposed to contact the lower surface of the valve seat member 162 . The valve member 164 is made of thin silicon rubber, and arms 164 b created by slits formed thereto support a valve means 164 e with extremely small spring constant. While the air chiller unit is operating, the valve means 164 e is air tightly attached to the opening 162 a of the valve seat by negative pressure, closing the drain valve. When the operation stops and dew drops gather on the valve means 164 e, the valve means 164 e is displaced by the weight and the valve is opened. When there are no dew drops, the valve is closed to prevent moisture from entering.
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