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On-demand oxygen dispensing system for aircraft passengers

An aircraft passenger and oxygen distribution technology, which is applied in emergency oxygen systems, aircraft parts, crew accommodation, etc., can solve problems such as small pressure changes, inability to detect the breathing of children or infants, and inability to sense correctly

Inactive Publication Date: 2019-07-02
ZODIAC AEROTECHNICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] A problem arises when a child or infant uses a respirator: in this case, the pressure change sensed at the oxygen distribution unit may be too small to be sensed correctly, and thus there is no use detected. Breathing risk for children or infants with breathing masks
There may also be a risk of going undetected in the elderly or those with severe respiratory conditions such as asthma

Method used

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  • On-demand oxygen dispensing system for aircraft passengers
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  • On-demand oxygen dispensing system for aircraft passengers

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0099] Here, the sensing device 7 relies on temperature sensing.

[0100] One or more parameters affected by respiration is the temperature at which the cavity 9 delimited by the mask and the user's face UF is located.

[0101] Provide temperature sensitive components such as thermistors.

[0102] The thermistor can be NTC or PTC. Preferably, NTCs with good sensitivity in the range of 10°C to 40°C are selected, such as Epcos S861 series or Honeywell 135 series.

[0103] The thermistor 71 is located inside the mask body so that it directly receives the exhaled airflow from the user's mouth and nose.

[0104] Such as figure 2 As shown, the thermistor 71 can be a discrete element in the projected position such that the exhaled air flow substantially surrounds the thermistor 71 . Thus, time constants are minimized (ie, without significant delay), and temperature cycles are sensed in near real time.

[0105] The exhaled temperature is between 30°C and 37°C, while the ambient ...

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PUM

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Abstract

An oxygen dispensing system for passenger(s) of an aircraft, comprising an oxygen dispensing unit (1), with a dispensing valve (6) supplied by an oxygen source, a tube assembly (10) comprising a tube(3) and an optical fiber (5), a breathing mask (2), wherein the tube establishes a fluid connection between the oxygen dispensing unit and the mask, a sensory device (7) arranged at the breathing mask, connected to the oxygen dispensing unit via the optical fiber, wherein the sensory device senses, at the breathing mask, variations of parameter(s) influenced by the breathing of a passenger using the mask, and transmit, via the optical fiber (5), corresponding breath signal(s) to the oxygen dispensing unit (1) which is configured to deliver, upon said breath signal, a controlled quantity of oxygen in the tube.

Description

technical field [0001] The invention relates to an on-demand oxygen distribution system for aircraft passengers. [0002] More specifically, it pertains to oxygen-on-demand systems where masks are dropped from an upper module (PSU Passenger Service Unit) upon depressurization and in "on-demand" mode (i.e. only when the passenger is breathing through the mask) Oxygen is dispensed to the passenger. Background technique [0003] It is known to supply oxygen to passengers in emergency situations such as decompression, smoke or fire in the cabin. For this purpose, an oxygen mask is dropped from the passenger service unit and oxygen is provided to the passenger via the oxygen mask. Oxygen masks are connected to the passenger service unit by connecting wires. [0004] Typically, the passenger activates the oxygen supply by pulling on a connection line, which may be a flexible tube that also directs oxygen from the passenger service unit to the oxygen mask, or may be a wire or R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D11/00
CPCB64D11/00B64D2231/025A62B18/08A62B7/14B64D13/04A62B9/02A62B7/02A62B18/02
Inventor 沃尔夫冈·里特纳卡雷格·达姆洛亨里·马罗泰
Owner ZODIAC AEROTECHNICS