| 摘要 |
The climate in one or more aircraft cabin zones is controlled to achieve a minimal use of fresh air and an optimal use of recirculation air while satisfying official regulation requirements and avoiding freeze-ups in the air duct system of commercial aircraft. For this purpose temperature sensors ascertain a plurality of different actual temperature informations at different locations in the air supply system. Valve position sensors provide actual flow volume information from one or more valve locations. An r.p.m., volumetric flow or differential pressure sensor provides actual blower r.p.m., volumetric flow or differential pressure information. A CPU compares the actual information with rated information stored in a memory or entered through a keyboard to provide control signals, including closed loop control and/or open loop control signals, to a blower or blowers, a valve or valves, and to at least one air conditioner. The control is such, that the total air supply volume of mixed air into the cabin corresponds to the sum of a minimal fresh air supply volume plus an optimal used air recirculation volume. A minimal discharge of used air out of the cabin is assured.
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