在圖 2-1的上方，隔離活門將左右系統分隔成獨立的兩部分。在隔離活門的左邊， APU引氣管道立連接著左交輸管道；在右邊，壓縮空氣地面接頭連接右交輸管道。用戶系統可以從這些管道獲得壓縮空氣，通過適當的控制活門進行控制。
LESSON 3 AIR CONDINTION空調系統
一、單詞二、TEXT
空氣調節  Air conditioning 環境  Ambient 機組  Crew
加熱  heat 冷卻  Cool 增壓  pressurization
引出，放出  Bled 總管道  Manifold 分離  Seprate 

獨立的  indenpendent 冷卻組件  Cooling pack 調節，管理  regulate
暖，熱  Worm 減少  Reduce 期望  Desire
渦輪冷卻器  Air cycle machine 整的  Integral 包括  Consist of
共同的  Common 軸  Shaft 離開  Leave
膨脹 V  Expand 膨脹 N  Expansion 下降  Drop
零下  Sub-zero 分配  Distribute 此外  In addition
配平空氣管道  Trim air line 混合  Mix 室、容器  Chamber
加上，增加  Add 頭頂上  Overhead 豎管  Raise
收集器  Collector 防護罩  Shroud 過濾器  Filter
排出口  discharge 再分配  Redistribute 二等分  halve

(1) the air conditioning system provides a conditioned air environment for the passengers and crew , heats the cargo compartment, cools the electronic equipment, and supplies air for the pressurization system.

空調系統為旅客和機組提供環境溫度的控制，為客艙供熱，為電子設備艙降溫，還有為增壓系統提供空氣。

(2) Air is bled from the pneumatic manifold and conditioned by 2 separate and independent cooling packs. Air flow into the packs is regulated by the pack valves.

空氣從增壓主管道和空調中通過 2個隔離的，相互獨立的冷卻組件中被引入。空氣流進組件中通過組件活門調節。

(3) Air from the pneumatic manifold is too warm and must be cooled. The pupose of 2 packs is to reduce engine bleed air temperature to the desired temperature.

從增壓主管道中來的空氣太熱，需要降溫。兩個組件的作用就是將發動機引氣溫度降低到需要的溫度。

(4) An air cycle machine is an integral unit of each cooling pack. The air cycle machine consists of a turbine wheel and a compressor wheel mounted on a common shaft. Air flowing through the air cycle machine drives the turbine, the turbine drives the compressor section. As the air leaves the turbine it expands greatly. This expansion can cause the

temperature of the air to drop to sub-zero levels.
渦輪冷卻器是構成每個冷卻組件所必需的。它包括一個渦輪和一個壓氣機，安裝在共同的軸上。氣流通過渦輪冷卻器驅動渦輪，渦輪驅動壓氣機部分。當空氣離開渦輪后急劇膨脹。這種膨脹能夠導致空氣溫度降到零度以下的程度。
(5) In figure 3-1, we can see that the conditioned air from the right pack flows into the main distribution manifold, the conditioned air from the left pack flows into the main distribution manifold and into the flight compartment. In addition, a trim air line from the left mix chamber adds hot air to the flight compartment duct. The main distribution manifold supplies the passenger compartment overhead distribution system through tow sidewall risers.