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DASSAULT FALCON 900EX EASY SYSTEMS SUMMARY Air Conditioning & Pressurization(10)

时间:2012-01-12 15:51来源:蓝天飞行翻译 作者:公务机

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the nose cone, supplied with cabin conditioning air and slightly pressurized in flight by an automatic control system.

 

  PRESSURIZED AREAS

 


Pressurization is achieved by regulating cabin conditioning airflow through two outflow valves located in the fuselage rear bulkhead:
-one electro-pneumatic main valve,
-one pneumatic emergency valve.
In automatic mode, the Cabin Pressurization Controller (CPC) electrically controls the electro-pneumatic main outflow valve and the emergency outflow valve is pneumatically slaved to the main outflow valve.
In manual mode, the second outflow valve is pneumatically controlled by the manual cabin altitude rate setting knob, the electro-pneumatic valve is closed. Pneumatic operation is used as a backup mode in case the electrically controlled outflow valve fails.

MAIN PRESSURIZATION COMPONENTS LOCATION
The pressurization system is connected to the avionics system to: -allow the crew to select the different AUTO modes (NORM or FL), -activate the LOW mode of climb/descent rate, -enter the landing field elevation, -take into account the barometric setting, -provide the CPC with airplane altitude and vertical speed, -display the cabin pressurization parameters and CAS messages to the crew.

 

PRESSURIZATION SYSTEM COMPONENTS

 

Cabin Pressure Controller (CPC)
The digital cabin pressure controller manages cabin pressurization in the automatic mode. The CPC is composed of: -a digital Printed Circuit Board (PCB) with a pressure and temperature sensor to achieve automatic pressure control,
-an analog PCB with a pressure sensor which provides a second indication of cabin pressure and cabin pressure rate of change. This output is the only available source in manual mode.
The CPC is located in the left side electrical cabinet behind the pilot seat and is controlled
by the pressurization controls located on the overhead panel.
 
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