Device and method for distributing air in a cargo aircraft
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A technology of aircraft and air volume, applied in air handling equipment, transportation and packaging, aircraft parts, etc., can solve problems such as fuel consumption, achieve the effects of reducing fuel consumption, reducing fresh air supply, and avoiding animal death
Inactive Publication Date: 2009-04-15
AIRBUS OPERATIONS GMBH
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Because this amount of bleed air is no longer available to the aircraft engines for combustion and must therefore be generated later by the aircraft engines, this bleed air generation costs fuel
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[0021] Hereinafter, preferred embodiments of the present invention are described in detail in terms of structure and function based on schematic drawings.
[0022] The sole figure is a simplified block diagram of an air distribution system 10 for a cargo aircraft. In this block diagram, bold drawn lines represent plumbing connections, while thinner lines are signal paths that can be wired or wireless. According to the present embodiment, the cargo aircraft (not described in detail) has four jet engines 12, 14, 16 and 18, which are used to drive the cargo aircraft and which at the same time represent the source of bleed air via the flow control valve 20, 22 , 24 and 26 are supplied to the air distribution system 10 .
[0023] To process the bleed air, the bleed air from the sources 12 and 14 flows into the first air conditioning unit 28 after passing through the associated valves 20 and 22 . Here, the bleed air is cooled and expanded and then leaves the first air conditioning...
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Abstract
The invention relates to a device and a method for distributing air in a cargo aircraft. The cargo aircraft has an air distribution system (10) which is connected to at least one cargo deck. The air distribution system comprises a source (12, 14, 16, 18) for bleed air, at least one so-called air conditioning unit (28, 38) for treating the bleed air, a mixing unit (32) which receives treated bleed air from the air conditioning unit (28, 38) and delivers it to the at least one cargo deck, and at least one shut-off valve (58, 60, 62, 64) between the mixing unit (32) and the cargo deck in order to interrupt or completely release the air supply to the cargo deck. In order to reduce the bleed air requirement, a cockpit switch (82, 84, 86, 88) co-operating with the shutoff valve is provided, the operation of which switch causes the at least one shutoff valve (58, 60, 62, 64) to take up an intermediate position. For this purpose the shutoff valve (58, 60, 62, 64) is formed as a motor-operated control valve which can take up any desired intermediate position between its completely open and completely closed position. A control unit (92) establishes for each possible operating state of the air distribution system a desired air volume balance and adjusts the flow volume through the at least one air conditioning unit (28, 38) in accordance with the desired air volume balance established for the respective operating state such that the pressure in the mixing unit (32) is at a constant, predetermined value.
Description
technical field [0001] The present invention relates to devices and methods for distributing air in cargo aircraft. Background technique [0002] Shut-off valves are provided in the air distribution system of conventional cargo aircraft in order to be able to shut off the air supply to the cargo compartment, also called the cargo deck, in the event of a fire in the cargo compartment. Passenger aircraft do not have such a shut-off valve, because even in the event of a fire in the passenger cabin the air supply in the passenger cabin cannot be shut off, otherwise the passengers would not have access to air for breathing. The aforementioned shut-off valves integrated in cargo aircraft are so-called two-position valves, ie they are either completely closed to interrupt the air supply to the cargo compartment, or fully open to unblock the air supply to the cargo compartment. If there are no unusual incidents (fire, etc.), a constant amount of fresh air is supplied to the cargo a...
Claims
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Application Information
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