JPH05131036A - Breathing device for supplying oxygen to passenger in aircraft in case of emergency - Google Patents

Abstract

PURPOSE: To enable an oxygen generator in a preparation position to radiate heat sufficiently to the surroundings even in a relatively long service time, in a respiration device for supplying oxygen to aircraft passengers in an emergency, and at the same time to decrease heat conduction from the oxygen generator to a storage container, while in this case avoiding limitations on the free moveability of a cover closing the storage container. CONSTITUTION: A holding device 4 for an oxygen generator 3 is designed to be movable between a preparation position and a service position, and in the service position the distance between the oxygen generator 3 and the interior wall surface of a storage container 1 is increased for the purpose of decreasing heat conduction between the oxygen generator 3 and the storage container 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breathing apparatus for supplying oxygen to an aircraft passenger in an emergency, which has a storage container which can be closed by a cover and can be fixed above a seat row. The storage container stores at least one breathing mask, and the exothermic oxygen generator having the chemical combined with the breathing mask is arranged in the holding device in the storage container. Regarding

[0002]

2. Description of the Related Art In certain emergency aircraft situations it is necessary to increase the oxygen concentration in the breathing air. This is to increase the breathing gas to an oxygen level that allows the survival of the user, for example in an environment with a relatively small partial pressure of oxygen that occurs after a pressure drop in the cabin at high altitudes. May be needed. Therefore, in airliners, for the purpose of emergency oxygen supply, a respiratory mask combined with an oxygen generator containing chemicals,
It is mounted above a passenger's seat in a state of being stored in a storage container that can be closed by a cover. The oxygen generator generally comprises an alkali metal chlorate mixture which, after activation, releases oxygen in an exothermic reaction. This oxygen can be inhaled by the passenger via a respiratory mask.

The amount of oxygen that can be supplied, that is, the size of the oxygen generator, is related to the required usage time. Especially when the descent time from high altitude is extended, a so-called long range system is required. In this long range system, the oxygen generator must have a relatively long operating time of up to 22 minutes.

When an exothermic reaction elapses in the oxygen generator, a considerable amount of heat is generated. This amount of heat heats the outer wall of the oxygen generator casing to about 280 ° C. Since the storage container is generally installed under the so-called hat rack (hat rack), the temperature of the storage container must be at the specified value even when in use in order not to endanger the functions of the peripheral components. Should not be exceeded. Furthermore, because of the limited installation space provided for the storage container, it is generally not possible to house the required insulation within the storage container.

A storage container with a fixedly mounted oxygen generator is particularly suitable for use in German patent application DE 36 36 037 A1.
It is known from the specification of 13813.

German Patent Application Publication No. 3613
In the configuration described in Japanese Patent No. 814, the oxygen generator is arranged on the openable cover of the storage container to increase the heat dissipation in the use position. However, fixing the oxygen generator to the cover presents various drawbacks. That is to say, because of the particularly heavy weight of the oxygen generator, the cover must be provided with a relatively stable swivel bearing, i.e. a swivel bearing which increases the weight, and furthermore, for such swivel bearings. Has a 100 ° swivel range to allow the breathing mask to fall freely. Based on these assumptions, mounting the oxygen generator on the cover would be inconvenient for certain use cases.

[0007]

SUMMARY OF THE INVENTION The object of the invention is to improve a breathing apparatus of the type mentioned at the outset such that the oxygen generator in the ready position, even for a relatively long use time, is sufficiently environmentally friendly. It is an object of the present invention to provide a breathing apparatus which enables heat dissipation and at the same time reduces the heat transfer from the oxygen generator to the storage container, and in this case does not limit the free movement of the cover closing the storage container. ..

[0008]

In order to solve this problem, in the constitution of the present invention, the holding device of the oxygen generator is variably configured between a preparation position and a use position, and in the use position. The distance between the oxygen generator and the inner wall surface of the storage container is enlarged for the purpose of reducing heat transfer between the oxygen generator and the storage container.

[0009]

According to the present invention, the above drawbacks can be avoided and the heat transfer from the oxygen generator to the storage container can be reduced. The oxygen generator is advantageous because it is configured with a holding device so that the position can be changed. In this case, in the use position, a sufficient distance is provided to the inner wall surface of the storage container, so that the use time is relatively long. However, overheating of the components located in the wall area can be reliably avoided.

In an advantageous configuration of the invention, an activation device for activating the oxygen generator is connected to a variable holding device of the oxygen generator, the oxygen generator being activated when activated. It can be moved from the ready position to the use position. This means that in the actual configuration, the kinematic course of the oxygen generator in the holding device is locked until the activation of the chemical reaction, which takes place by heat generation.

In another advantageous embodiment of the invention, a temperature-controllable release element, preferably a bimetal element, is provided for the purpose of releasing the movement of the oxygen generator from the ready position to the use position. In the position of use, the range of motion of the oxygen generator is advantageously limited by a fixed stop or locking device.

In a practically tested and advantageous configuration, the oxygen generator has a striking pin which is subjected to a spring preloading force, the striking pin being provided with a fixing pin, in which case: When the fixing pin is pulled out, the striking pin is released and the oxygen generator is activated, and at the same time, the swivel support device of the oxygen generator is also released, and the oxygen generator receives the action of gravity. It is designed to turn from the ready position to the use position.

The pivoting movement of the oxygen generator is optionally, optionally, assisted by a preloaded spring.

The oxygen generator is preferably housed in a closed casing in the form of a cartridge.

When constructed as in the present invention, the oxygen generator has sufficient insulation in the position of use for long-range operation, and overheating of the assembled peripheral components. A breathing apparatus is obtained in which

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings.

The storage container 1 shown in FIG. 1 is closed by a cover 2 in the ready position. In this storage container 1, a cartridge type oxygen generator 3 containing a chemical is rotatably supported by bearings 4 and 5 on the side. The position indicated by the broken line shows a storage container with a closed cover, in which case the oxygen generator 3 is also in the ready position. The components shown in solid lines show the oxygen generator 3 in the pivoted use position in the open cover 2.

In the free inner chamber of the storage container 1, generally three to four respiratory masks (not shown) are stored.
On the end face of the cartridge type oxygen generator 3, a rotating pin 1
1 is provided. Since the rotary pin is engaged with the holes provided in the bearing bases 4 and 5, the oxygen generator 3 moves from the ready position to the use position around the rotary pin 11. In this case, the tubular sleeves 6, 7 will be
It slides in the arch-shaped guide notch 8 and 9 provided in 5. The bearing pedestals 4, 5 are provided with a circular stamping section 10 for the purpose of weight saving.

In order to assist the pivoting movement of the oxygen generator 3, a wire spring 12 is provided on the rotating pin 11, which wire spring is preloaded in the ready position of the oxygen generator 3 to form a tubular sleeve. Touching 6.

A spring-elastic tongue piece 13 is provided on the movement trajectory of the tubular sleeves 6, 7, which narrows the guide trajectory of the tubular sleeves 6, 7. The tongue is
The pivoting movement along the guide cutouts 8, 9 under the influence of gravity when the cover 2 is opened damps the tubular sleeves 6, 7 in their end position, i.e. in use position.

The activation device for the oxygen generator 3 will be described in detail with reference to FIG. A striking pin 15 slidable in the tubular sleeve 6 is engaged with the angle member 14 integrally formed with the bearing base 5 in the preparation position. Striking pin 15
Abutting against the end portion 16 of the coil spring 17 is a coil spring 17 supported in a tubular sleeve, which coil spring is preloaded appropriately. The end of the striking pin 15 is fixed in position by a fixing pin 18. When this fixing pin is pulled out, the striking pin 15 is released.

When the cover 2 is opened, the respiratory mask drops. The breathing mask is provided with a rope 19, which is connected to a fixing pin 18. By pulling out the fixing pin 18, the striking pin 15 is released and its ignition tip 20 collides with the igniter 21, so that a chemical reaction is caused and oxygen is formed. At the same time, the movement of the striking pin 15 unlocks the oxygen generator 3 in the preparatory position, which under the influence of gravity shifts into the use position along the arch-shaped guide notches 8, 9. It moves and at this point the spring-elastic tongue 13 locks the oxygen generator.

[Brief description of drawings]

FIG. 1 is a side view showing a support device for an oxygen generator in a breathing apparatus according to the present invention.

FIG. 2 is a view of the storage container as seen from below with the cover removed.

FIG. 3 is a cross-sectional view showing a part of an oxygen generator.

[Explanation of symbols]

1 storage container, 2 cover, 3 oxygen generator,
4,5 Bearing base, 6,7 Tubular sleeve, 8,9
Guide notch, 10 punched part, 11 rotary pin, 12 wire spring, 13 tongue piece, 14 angle member, 15 striking pin, 16 end part, 17 coil spring, 18 fixing pin, 19 rope, 20 ignition tip part, 21 Ignition device

Claims (11)

[Claims] 1. A breathing apparatus for supplying oxygen to an aircraft passenger in an emergency, the storage container (1) can be closed by a cover (2) and can be fixed above a row of seats.
Is provided, wherein the storage container stores at least one respiratory mask, and in the storage container, an exothermic oxygen generator (3) having a chemical combined with the respiratory mask is provided with a holding device ( 4, 5), the holding device (4, 4) of the oxygen generator (3).
5) is variably configured between a preparation position and a use position, and the distance between the oxygen generator (3) and the inner wall surface of the storage container (1) at the use position is the oxygen generator. (3)
Breathing device for supplying oxygen in an emergency to passengers of an aircraft, characterized in that it is enlarged for the purpose of reducing the heat transfer between it and the storage container (1). 2. An activation device (15, 21) for activating the oxygen generator (3) comprises the oxygen generator (3).
Respiratory device according to claim 1, characterized in that it is connected to a holding device (4, 5) of variable position so that the oxygen generator (3) can be moved from a ready position to a use position when activated. .. 3. A swirl holding device (4,5, 6, 7, 11) is provided for the purpose of holding the oxygen generator,
The breathing apparatus according to claim 2. 4. The breathing apparatus according to claim 3, wherein the swivel holding device has a link spring mechanism. 5. Respiratory device according to claim 1, wherein a temperature-controllable release element is provided for the purpose of releasing the movement of the oxygen generator (3) from the ready position to the use position. 6. A breathing apparatus according to claim 5, wherein the temperature-controllable release element is embodied as a bimetal element. 7. The oxygen generator (3) in use position.
The breathing apparatus of claim 1, wherein the range of motion of the is limited by a fixed stopper. 8. A breathing apparatus according to claim 7, wherein the oxygen generator (3) is lockable in the position of use by a lock coupling device (13). 9. The activation device comprises, on one tubular sleeve (6) provided on the oxygen generator (3), a striking pin (15) under a spring preload force, The fixing pin (18) is engaged with the striking pin (15), and when the fixing pin (18) is pulled out, the striking pin (15) is released to activate the oxygen generator (3). The breathing apparatus according to claim 2 or 3, wherein the swivel support device is released so that the oxygen generator (3) is swung from the ready position to the use position by the action of gravity. 10. A breathing apparatus according to claim 9, wherein the pivoting movement of the oxygen generator is assisted by a preloaded spring (12). 11. Respiratory device according to claim 1, wherein the oxygen generator (3) is housed in a cartridge-shaped casing.