NL7905749A - CHEMICAL OXYGEN GENERATOR. - Google Patents

Description

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Dragerwerk Aktiengesellschaft, in Lübeck, Federal Republic of Germany Chemical oxygen generator

The invention relates to a chemical oxygen generator with a chlorate candle, the oxygen outlet opening of which is closed during the time of use.

Known chemical oxygen generators contain in a house a flammable material in the form of a candle, for example a chlorate candle. After ignition by means of a starter, the material undergoes a thermal reaction while developing oxygen. The oxygen flows to the consumer in a predetermined way. The sweeping energy arises from the overpressure generated in the housing during the thermal reaction.

Chlorate candles as a flammable material are sensitive to moisture. In addition, certain amounts lead to inflammation, while smaller amounts lead to inactivity. The housings should therefore be sealed and closed during the time of use. The housings and the necessary seals, such as, for example, the oxygen exhaust pipe, must be designed in such a way that in case of use, which is practically always an emergency, there is no danger for the user by forgetting to open or through complicated handling. In addition, it must be ensured that the overpressure formed in the housing during the thermal reaction cannot become a hazard.

A known chemical oxygen generator has several pressure limiting valves to prevent excessive excess pressure in the housing. One of these valves is mounted on the top edge of the housing and connects the oxygen space between the oxygen generating candle and the inner housing to the environment. A second valve connects the insulating space between the inner and outer casing to the external environment and is mounted in the bottom of the outer casing. A third pressure relief valve connects the insulating space to the 7905749 • r 9 "- 2> room. nothing is said about the construction of the valves themselves, however, the valves essentially have parts which must be movable for functioning, but it is doubtful whether this is still the case after a long period of use.

5 No mention is made of the sealing of the exhaust vent for oxygen, which is necessary for all chemical oxygen generators. Adhesive foils are probably used for this, as are known from other oxygen generators. In no case do such foil seals ensure a sealing which may be required over 10 years. (U.S. Pat. Nos. 3,7 ^ 2,683 and 3,736,10U).

The object of the invention is to prevent leaks even during longer storage before being ready for use, to reliably open the oxygen exhaust pipe after the start of use and to prevent overpressure in the housing.

This object is achieved according to the invention in that a kink disk closure is arranged in the oxygen space in front of the exhaust pipe.

Other features are specified in the subclaims.

By using the bend disc closure for the exhaust pipe, it is in a simple manner ensured both a tight sealing, also for longer storage times, and a reliable opening of the connection pipe after commissioning. With the set maximum pressure, the kink disk jumps in the direction pp to the other side of the closure with the lower pressure. The cutting point arranged within the kinking area of the kinking disk cuts the kinking disk open and thus opens the closure.

The intersection as a bent-out triangular tongue is easily adjustable. The chromium-nickel steel plate 30 used for the kinking disc guarantees an even elasticity, even after years, and thus a necessary kinking force necessary for kinking.

An exemplary embodiment of the invention is shown in the drawing and is described in the following.

Fig. 1 is a longitudinal section of the oxygen generator.

FIG. 2 is a top view at the intersection.

7905749

Claims (6)

5 The oxygen generator 1 can also be equipped with a starter using water. The bottom 8 of the housing 2 defines the oxygen space 9 which is between them and the chlorate candle 3. The bottom 8 carries the exhaust pipe 10 for the oxygen to be discharged. Prior to this bottom, in the oxygen space 9, the kink disk closure 11 is located. The material of the kink disk 13 is chrome-nickel steel sheet. The kink disk 13 projects with the convex side into the oxygen space 9. The concave side is connected to the low pressure side via opening 1¾. Intersection 17 protrudes into the kink portion 16 of the kink slide 13. The intersection point is a tongue 18 bent upwards by approximately 130 ° in the form of an equilateral triangle with sharp edges, the tongue being in communication with the circumference of the flange 19 to be fixed, with the selection of the kink disk closure 20 11 being reached. maximum pressure in the housing 2 jumps over the kink disk 13 in the direction of the low pressure side. The triangular tongue 18 with sharp edges cuts the kink disk 13 and thus opens the kink disk closure. The oxygen can pass through the exhaust pipe 10 to the user. 25 CONCLUSIONS 1. Chemical oxygen generator with chlorate candle, wherein the oxygen outlet opening is closed during the time of ready-for-use, characterized in that a kink disk closure (11) is arranged in the oxygen space (9) before the outlet pipe (10). Chemical oxygen generator according to claim 1, characterized in that the kink disk closure 11 has a cutting point (17) on the pressure side of the kink disk (13) that is too low in the kink region (16). Chemical oxygen generator according to claim 1 or 3> 2, characterized in that the intersection point (17) consists of a 7905749 P 'which is approximately 130 °. k highly curved tongue (l8) in the form of an equilateral triangle with sharp edges. k. Chemical oxygen generator according to any one of the preceding claims, characterized in that the material of the kinking disk (13) is a chromium-nickel steel plate. Chemical oxygen generator according to any one of the preceding claims, characterized in that the exhaust pipe (10) with the kink disk closure (11) is arranged in the bottom (8) for this purpose. 7905749