EP2286877B1 - Kreislauf zur Versorgung von einem Flugzeugpassagier mit einem Atemgas aus einer einen Druckregler enthaltenden Druckgasquelle - Google Patents

Kreislauf zur Versorgung von einem Flugzeugpassagier mit einem Atemgas aus einer einen Druckregler enthaltenden Druckgasquelle Download PDF

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Publication number
EP2286877B1
EP2286877B1 EP09168346.6A EP09168346A EP2286877B1 EP 2286877 B1 EP2286877 B1 EP 2286877B1 EP 09168346 A EP09168346 A EP 09168346A EP 2286877 B1 EP2286877 B1 EP 2286877B1
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EP
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Prior art keywords
pressure
oxygen cylinder
valve body
chamber
regulating
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EP09168346.6A
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English (en)
French (fr)
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EP2286877A1 (de
Inventor
Wolfgang Rittner
Rüdiger Meckes
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Safran Aerosystems SAS
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Zodiac Aerotechnics SAS
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Priority to EP09168346.6A priority Critical patent/EP2286877B1/de
Priority to CN201010259767.8A priority patent/CN101991922B/zh
Publication of EP2286877A1 publication Critical patent/EP2286877A1/de
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/14—Respiratory apparatus for high-altitude aircraft

Definitions

  • the present invention relates to a circuit for supplying a respiratory gas to an aircraft passenger comprising a pressurized source of the respiratory gas, a respiratory mask of the aircraft passenger, and a supply line coupled between the pressurized source and the respiratory mask for supplying the respiratory gas from the pressurized source to the respiratory mask.
  • the invention also relates to a pressurized source of a respiratory gas for being used in circuit for supplying the respiratory gas to an aircraft passenger.
  • oxygen may be supplied to the aircraft passenger on board for aircrafts in case of a depressurization accident or the occurrence of smoke in the aircraft.
  • These aviation regulations are usually fulfilled by providing a circuit for supplying a respiratory gas to the aircraft passengers which comprises a pressurized source of the respiratory gas, a respiratory mask for each of the aircraft passengers and crew members, and a supply line coupled between the pressurized source and the respiratory mask for supplying the respiratory gas from the pressurized source to the respiratory mask.
  • US 2007/0144597 A1 discloses a circuit for supplying oxygen to aircraft passengers.
  • the high pressure cylinder containing oxygen is coupled to a line by means of a pressure reducer which delivers oxygen at a gage pressure to the line.
  • the line is coupled to a pressure regulator for the respiratory masks of the crew and to a regulation unit for regulating the pressure of the oxygen provided to the passenger masks.
  • the regulation unit comprises a pressure regulator for regulating the pressure of the oxygen supplied to the passenger masks.
  • the regulation unit is controlled by an electronic control unit for avoiding systematic oxygen overconsumption and hence for allowing a reduction of the size or number of oxygen cylinders and their weight to be stored in the aircraft.
  • the invention is based on the idea of providing the pressurized source with a pressure regulating unit with an integrated sealing mechanism. Therefore, there is no loss of the respiratory gas during the standby operation as the pressurized source is sealed.
  • the sealing of the pressurized source is achieved by arranging the valve body in the sealing position. In case of an emergency the sealing of the pressurized source is disabled by moving the valve body to a regulating position range which, at the same time, determines the pressure of the respiratory gas applied to the supply line. By controlling the position of the valve body within the regulating position range the pressure applied to the supply line and thus to the respiratory masks is regulated. Therefore, the valve body according the present invention serves as a sealing mechanism as well as a pressure regulating mechanism.
  • the oxygen cylinder further comprises a circuit for supplying a respiratory gas to an aircraft passenger, comprising a respiratory mask for the aircraft passenger, a supply line coupled between the oxygen cylinder and the respiratory mask for supplying the respiratory gas from the oxygen cylinder to the respiratory mask.
  • the pressure regulating unit further comprises a spring element holding the valve body in the sealing position.
  • the spring element advantageously ensures that the valve body is in the sealing position all the time except for emergency cases.
  • This arrangement further provides the advantage that the pressurized source is sealed during transport between a filling station and the mounting of the pressurized source within the circuit of the aircraft.
  • the spring element is further adapted to move the valve body from the regulating position range to the sealing position.
  • the spring element is adapted to serve as a multiply closing mechanism which causes the valve body to move into the sealing position also in case the pressurized source was already activated and opened.
  • a pressurized source can be used multiple times and it is not necessary to exchange the pressurized source after the sealing was once opened.
  • the motor unit is adapted to move the valve body in a direction opposite to the direction of force, which is applied to the valve body by the spring element.
  • two forces are applied to the valve body in opposite directions: a first force applied by the spring element directs the valve body to the sealing position and a second force applied by the motor unit directs the valve body to the regulating position range.
  • the ratio of the first and second force is changed: during standby, the first force equals or is greater than the second force thus allowing the valve body to seal the pressurized source; in an emergency situation the second force is greater than the first force thus moving the valve body to the regulating position range and opening the pressurized source for supplying the respiratory gas to the respiratory mask.
  • the pressurized source is sealed and no leakage occurs.
  • the motor unit comprises a piezo actuator.
  • a piezo actuator provides the advantage of moving the valve body with a high accuracy.
  • the pressure regulating unit comprises a pressure regulating chamber and a high pressure chamber, wherein the pressure regulating chamber and the high pressure chamber are connected by an opening, which is sealed when the valve body is in the sealing position and which is open when the valve body is in the regulating position range.
  • the inventive circuit provides a highly integrated pressure regulating unit which fulfils a function of a closing mechanism and of a pressure regulating mechanism by varying the position of the valve body between the two chambers.
  • further entities like separate regulating means can be omitted and the weight of the overall circuit is reduced.
  • the spring element is comprised in the high pressure chamber and causes the valve body to seal the opening.
  • the high pressure chamber comprises a fill pressure gauge for determining the pressure of the respiratory gas within the pressurized source.
  • the fill pressure gauge By integrating the fill pressure gauge to the high pressure chamber further distinct entities can be omitted and the weight of the overall circuit can be reduced. Further, such arrangement allows the user of the pressurized source to quickly identify the status of the pressurized source and to determine if it should be exchanged. Thus, the storing of backup pressurized sources is not necessary thereby further reducing the weight to be carried in an aircraft using the inventive circuit.
  • the pressure regulating chamber comprises a temperature sensor for determining the temperature within the pressure regulating chamber. Also, it is preferred that the pressure regulating chamber comprises a regulator pressure sensor for determining the pressure within the pressure regulating chamber.
  • the circuit further comprises an altitude pressure sensor for determining the pressure within the cabin.
  • an altitude pressure sensor for determining the pressure within the cabin.
  • Such a sensor provides the advantage of determining a situation of depressurization within the cabin indicating a situation in which the valve body is to be moved from the sealing position to the regulating position range and, optionally, of activating the provision of the respiratory masks to the aircraft passengers and crew.
  • the circuit further comprises a control unit coupled to the regulator pressure sensor, to the temperature sensor and to the altitude pressure sensor, wherein the control unit is adapted for controlling the motor unit on basis of the determined pressures and temperature determined by the regulator pressure sensor, the temperature sensor and the altitude pressure sensor.
  • the controlling mechanism for the motor unit consists of few units and provides at the same time an accurate controlling mechanism. The weight of the circuit is thus further reduced.
  • control unit comprises a memory for storing a correlation between a predefined pressure within the pressure regulating chamber and a predefined temperature within the pressure regulating chamber and/or a predefined pressure within the cabin.
  • a memory for storing a correlation between a predefined pressure within the pressure regulating chamber and a predefined temperature within the pressure regulating chamber and/or a predefined pressure within the cabin.
  • control unit is adapted for causing the motor unit to move the valve body within the regulating position range until the determined pressure within the pressure regulating chamber matches a predefined pressure within the pressure regulating chamber.
  • the pressure regulation achieves a high grade of accuracy.
  • FIGS 1 and 2 illustrate a pressurized source 1 which comprises a respiratory gas within an oxygen cylinder.
  • the pressurized source comprises a pressure regulating unit comprising a high pressure chamber 2 and a pressure regulator chamber 5.
  • the pressure regulator chamber 5 may be detached from the high pressure chamber 2 for, for example, filling or refilling the oxygen cylinder with oxygen, wherein, after the filling, the valve body 15 is pushed to the sealing position by spring element 3 thus operating as a check valve.
  • an oxygen cylinder with a high pressure chamber 2 for being coupled with a pressure regulated chamber 5 is adapted for being used with an inventive circuit.
  • a supply line as well as an oxygen cylinder for being coupled to the inventive pressure regulating unit refer to essential elements of the invention.
  • a fill pressure gauge 4 is coupled to the high pressure chamber 2 for determining the pressure within the high pressure chamber 2 and thus the oxygen cylinder and for providing the determined pressure value to the user.
  • the pressure regulator chamber 5 comprises an opening for guiding a linear drive 6 of a micro linear actuator 8, which is arranged outside the pressure regulator chamber 5.
  • the opening for the linear drive 6 comprises a low pressure seal 7 for avoiding leakage.
  • the linear drive 6 is also guided through opening 16 and coupled to valve body 15.
  • the micro linear actuator 8 may be a linear piezo actuator of an electric motor with a mechanical linear drive 6.
  • valve body 15 In the sealing operation the valve body 15 is in the sealing position as indicated in figure 1 . That is, the valve body 15 is pushed to the valve seat by the spring element 3 thereby hermetically closing the opening 16 between the high pressure chamber 2 and the pressure regulator chamber 5.
  • the motor unit comprising the electrical motor 8 and the linear drive 6 is activated.
  • the electrical motor 8 drives the linear drive 6 in the direction opposite to the direction of force, which is applied by the spring element 3 to the valve body 15. That is, the valve body 15 is pushed against the force of the spring element 3 thereby opening the gas flow of the respiratory gas from the oxygen cylinder to and increasing the pressure within the pressure regulator chamber 5 as illustrated in figure 2 .
  • the method of operating the circuit of the exemplary embodiment is described in the following.
  • the activation of the circuit and the amount of movement of the valve body 15 is controlled by the electronic control unit 9.
  • the power supply for electronic control unit 9 is activated.
  • the control unit 9 causes the electric motor 8 to move the linear drive 6 in direction of the valve body 15.
  • oxygen flows into the pressure regulator chamber 5 of low pressure.
  • a temperature sensor 14 comprised in the pressure regulator chamber 5 determines the temperature within the pressure regulator chamber 5 and outputs the determined temperature value to the electronic control unit 9.
  • the circuit further comprises an altitude pressure sensor 10 for determining the pressure in the cabin. Also the altitude pressure sensor 10 outputs the determined pressure of the cabin to the electronic control unit 9.
  • the electronic control unit 9 controls the movement of the valve body 15 depending on the determined pressure of the cabin and/or on the determined temperature in the pressure regulating chamber 5. The controlling is carried out until the required or predefined value of pressure within the low pressure regulator chamber 5 associated with the determined temperature is reached, wherein the pressure within the pressure regulator chamber 5 is determined by regulator pressure sensor 11, in order to allow a flow of oxygen depending on the cabin pressure through calibrated orifice 13 to a plurality of respiratory masks 17 through supply line 12.
  • the electronic control unit 9 further comprises a memory for storing a table which lists predefined pressure values for the pressure within the pressure regulator chamber 5 depending on the temperature within the pressure regulator chamber 5 and the pressure value of the cabin. Thus, the table provides information about the required flow of oxygen for the respiratory masks of the passengers and the crew members.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Claims (15)

  1. Sauerstoffzylinder (1) eines Atemgases zur Verwendung in einem Kreislauf zur Versorgung von einem Flugzeugpassagier mit dem Atemgas,
    wobei der Sauerstoffzylinder eine Druckregelungseinheit mit einem integrierten Dichtmechanismus zum Koppeln des Sauerstoffzylinders (1) mit einer Versorgungsleitung (12) zum Zuführen des Atemgases vom Sauerstoffzylinder (1) zu einer Atemmaske (17) eines Flugzeugpassagiers umfasst,
    wobei die Druckregelungseinheit einen Ventilkörper (15), der aus einer Dichtposition in einen Regulierungspositionsbereich bewegbar ist, und eine Motoreinheit (6, 8) zum Regulieren des Drucks des der Versorgungsleitung (12) zugeführten Atemgases durch Bewegen des Ventilkörpers (15) innerhalb des Regulierungspositionsbereichs umfasst, wobei,
    wenn sich der Ventilkörper (15) in der Dichtposition befindet, der Sauerstoffzylinder (1) abgedichtet ist und,
    wenn sich der Ventilkörper (15) im Regulierungspositionsbereich befindet, der Sauerstoffzylinder (1) dazu ausgelegt ist, das Atemgas der Versorgungsleitung (12) zuzuführen.
  2. Sauerstoffzylinder nach Anspruch 1, ferner umfassend einen Kreislauf zum Versorgen von einem Flugzeugpassagier mit einem Atemgas, umfassend eine Atemmaske (17) für den Flugzeugpassagier, eine zwischen den Sauerstoffzylinder und die Atemmaske (17) gekoppelte Versorgungsleitung zum Zuführen des Atemgases vom Sauerstoffzylinder (1) zur Atemmaske (17).
  3. Sauerstoffzylinder nach Anspruch 2, wobei die Druckregulierungseinheit ferner ein Federelement (3) umfasst, das den Ventilkörper (15) in der Dichtposition hält.
  4. Sauerstoffzylinder nach Anspruch 3, wobei das Federelement (3) ferner dazu ausgelegt ist, den Ventilkörper (15) aus dem Regulierungspositionsbereich in die Dichtposition zu bewegen.
  5. Sauerstoffzylinder nach einem der Ansprüche 3 und 4, wobei die Motoreinheit (6, 8) dazu ausgelegt ist, den Ventilkörper (15) in einer Richtung zu bewegen, die der Richtung der durch das Federelement (3) auf den Ventilkörper (15) ausgeübten Kraft entgegengesetzt ist.
  6. Sauerstoffzylinder nach einem der vorangehenden Ansprüche, wobei die Motoreinheit (6, 8) einen Piezoaktuator (8) umfasst.
  7. Sauerstoffzylinder nach einem der vorangehenden Ansprüche, wobei die Druckregelungseinheit eine Druckregelungskammer (5) und eine Hochdruckkammer (2) umfasst, wobei die Druckregelungskammer (5) und die Hochdruckkammer (2) durch eine Öffnung (16) verbunden sind, die abgedichtet ist, wenn sich der Ventilkörper (15) in der Dichtposition befindet, und die offen ist, wenn sich der Ventilkörper (15) im Regulierungspositionsbereich befindet.
  8. Sauerstoffzylinder nach einem der vorangehenden Ansprüche, wobei das Federelement (3) in der Hochdruckkammer (2) enthalten ist und bewirkt, dass der Ventilkörper (15) die Öffnung (16) abdichtet.
  9. Sauerstoffzylinder nach einem der vorangehenden Ansprüche, wobei die Hochdruckkammer (2) einen Fülldruckmesser (4) zum Bestimmen des Drucks des Atemgases innerhalb der unter Druck stehenden Quelle (1) umfasst.
  10. Sauerstoffzylinder nach einem der vorangehenden Ansprüche, wobei die Druckregelungskammer (5) einen Temperatursensor (14) zum Bestimmen der Temperatur innerhalb der Druckregelungskammer (5) umfasst.
  11. Sauerstoffzylinder nach einem der vorangehenden Ansprüche, wobei die Druckregelungskammer (5) einen Reglerdrucksensor (11) zum Bestimmen des Drucks innerhalb der Druckregelungskammer (5) umfasst.
  12. Sauerstoffzylinder nach einem der vorangehenden Ansprüche, wobei der Sauerstoffzylinder ferner einen Höhendrucksensor (10) zum Bestimmen des Drucks innerhalb der Kabine umfasst.
  13. Sauerstoffzylinder nach einem der vorangehenden Ansprüche, wobei der Sauerstoffzylinder ferner eine Steuereinheit (9) umfasst, die mit dem Reglerdrucksensor (11), mit dem Temperatursensor (14) und mit dem Höhendrucksensor (10) gekoppelt ist, wobei die Steuereinheit (9) dazu ausgelegt ist, die Motoreinheit (6, 8) auf der Grundlage der bestimmten Drücke und Temperatur, die durch den Reglerdrucksensor (11), den Temperatursensor (14) bzw. den Höhendrucksensor (10) bestimmt wurden, zu steuern.
  14. Sauerstoffzylinder nach Anspruch 13, wobei die Steuereinheit (9) einen Speicher zum Speichern einer Korrelation zwischen einem vordefinierten Druck innerhalb der Druckregelungskammer (5) und einer vordefinierten Temperatur innerhalb der Druckregelungskammer (5) und/oder einem vordefinierten Druck innerhalb der Kabine umfasst.
  15. Sauerstoffzylinder nach einem der Ansprüche 13 und 14, wobei die Steuereinheit (9) dazu ausgelegt ist, die Motoreinheit (6, 8) dazu zu veranlassen, den Ventilkörper (15) innerhalb des Regulierungspositionsbereichs zu bewegen, bis der bestimmte Druck innerhalb der Druckregelungskammer (5) einem vordefinierten Druck innerhalb der Druckregelungskammer (5) entspricht.
EP09168346.6A 2009-08-21 2009-08-21 Kreislauf zur Versorgung von einem Flugzeugpassagier mit einem Atemgas aus einer einen Druckregler enthaltenden Druckgasquelle Active EP2286877B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09168346.6A EP2286877B1 (de) 2009-08-21 2009-08-21 Kreislauf zur Versorgung von einem Flugzeugpassagier mit einem Atemgas aus einer einen Druckregler enthaltenden Druckgasquelle
CN201010259767.8A CN101991922B (zh) 2009-08-21 2010-08-19 为飞机乘客供应呼吸气体的线路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09168346.6A EP2286877B1 (de) 2009-08-21 2009-08-21 Kreislauf zur Versorgung von einem Flugzeugpassagier mit einem Atemgas aus einer einen Druckregler enthaltenden Druckgasquelle

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EP2286877A1 EP2286877A1 (de) 2011-02-23
EP2286877B1 true EP2286877B1 (de) 2019-01-16

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EP09168346.6A Active EP2286877B1 (de) 2009-08-21 2009-08-21 Kreislauf zur Versorgung von einem Flugzeugpassagier mit einem Atemgas aus einer einen Druckregler enthaltenden Druckgasquelle

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CN (1) CN101991922B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2550994B1 (de) * 2011-07-25 2014-07-02 Intertechnique Regelventil für ein Lebenserhaltungssystem
US10493304B2 (en) * 2012-11-09 2019-12-03 B/E Aerospace, Inc. Aircraft lavatory oxygen source
FR3067612B1 (fr) * 2017-06-16 2019-07-26 Zodiac Aerotechnics Equipement respiratoire pour aeronef avec masque et harnais gonflable et son espace de rangement.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672956B1 (fr) * 1991-02-14 1993-04-23 Air Liquide Valve de regulation pneumatique.
US5809999A (en) * 1995-08-30 1998-09-22 Daimler-Benz Aerospace Airbus Gmbh Method and apparatus for supplying breathable gas in emergency oxygen systems, especially in an aircraft
FR2858560B1 (fr) 2003-08-04 2005-09-09 Air Liquide Circuit de fourniture d'oxygene a des passagers d'un aeronef
BRPI0520671A2 (pt) * 2005-11-09 2009-05-19 Intertechnique Sa circuito de fornecimento de oxigênio para um tripulante de aeronave
JP2009533105A (ja) * 2006-04-13 2009-09-17 アンテルテクニク 乗客を輸送する航空機用の呼吸ガス供給回路

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* Cited by examiner, † Cited by third party
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Publication number Publication date
CN101991922B (zh) 2014-04-02
EP2286877A1 (de) 2011-02-23
CN101991922A (zh) 2011-03-30

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