JPH0348176Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present invention relates to an oxygen generator using a chemical oxygen generator (hereinafter referred to as a candle) that is mainly made of chlorate and generates oxygen through thermal decomposition. be.

Conventional technology Candles are usually made by mixing alkali metal salts of chloric acid, which is the main ingredient, with metal oxides or peroxides to capture chlorine released during the decomposition of iron powder or chlorate. A core compressed into a columnar shape,
It consists of an igniter attached to the end of the core to ensure the initiation of thermal decomposition of the core.

As described in Japanese Patent Publication No. 60-2243, the oxygen generating device using the above-mentioned candle as an oxygen source consists of covering one candle with heat-resistant fibers such as ceramic fibers or other breathable materials, and covering the entire candle with heat-resistant fibers such as ceramic fibers or other breathable materials. It was housed in a metal container and was equipped with an igniter and an oxygen outlet.

Problems to be solved by the invention In order to increase the rate of oxygen generation from the candle in the conventional oxygen generator described above, it is thought to increase the reaction cross section of the core or increase the reaction rate of the core. It will be done.

However, in the former case, the core must be formed to have a large cross-sectional area, requiring a large-capacity press during forming, and it is difficult to uniformly disperse chlorate, iron powder, etc. in the formed cross-section. . In addition, since the cross-sectional area of the core is large, the temperature gradient becomes large, and there is a difference in reaction rate between the axis of the reaction surface and the part away from the axis, making it difficult to react uniformly across the reaction surface. Therefore, there is a problem in that it is difficult to maintain a constant rate of oxygen generation on the reaction surface.
In the latter case, if the blending ratio of iron powder, which is the fuel, is increased,
Although the reaction rate increases, there are problems in that not only does the calorific value increase, but also a portion of the generated oxygen is consumed by the iron powder, resulting in a decrease in oxygen generation efficiency.

The present invention aims to provide an oxygen generator that can solve the above-mentioned conventional problems.

Means for Solving the Problems The means for achieving the above object of the present invention are as follows.

A candle is formed by bundling a plurality of cores so that their side surfaces are in close contact with each other, and applying an ignition agent to one end of the group of cores. The outer periphery and both ends of the candle are covered with a breathable heat insulating material such as ceramic fiber to reinforce each core, and the end of the candle where the ignition agent is attached and the outer peripheral part near that end, i.e. An ignition cap is placed over the above-mentioned heat insulating material to contain the initial heat generation at the oxygen generation start part, and the outer periphery of the candle other than the oxygen generation start part is covered with a core shield to be reinforced, and a metal container is constructed. One end of this metal container is provided with a igniter for igniting the above-mentioned ignition agent, and the other end is provided with an oxygen outlet, and the above-mentioned An absorbent that absorbs impurity gas in oxygen generated by the reaction of the core is filled between the oxygen outlet and the candle.

Function When the igniter is operated to ignite the igniter, the ends of each bundled core are heated and a thermal decomposition reaction begins. Oxygen is continuously evolved as the reaction progresses gradually towards the opposite end of each core. The generated oxygen passes through the air gap between each core, passes through the breathable insulation material covering the end of the candle, and then passes through the absorbent layer where impurity gases are absorbed and removed, thereby being purified and sent to the oxygen extraction port. taken from. In addition, oxygen heated to high temperature on the reaction surface of each core passes through the gaps between each core, transmitting a part of the calorific value during the pyrolysis reaction of each core to the low-temperature unreacted part of each core. Because it preheats the unreacted part of the core,
The thermal decomposition reaction of each core proceeds smoothly.

Embodiment Next, an embodiment of the present invention will be described based on the drawings. Reference numeral 1 indicates a core, and cores of standard size or of various sizes are used. 2 is multiple pieces of core 1,
For example, it is a core group made by bundling 12 cores so that their cylindrical side surfaces are in close contact with each other, and an ignition agent 3 is attached to one end of this core group 2 to create a candle 4.
form. 5 is a heat insulating material that covers the outer periphery of the candle 4 and reinforces each bundled core 1; 6, 7;
is a heat insulating material that covers both ends of the candle 4 and reinforces each bundled core 1, and these heat insulating materials 5,
For 6 and 7, a heat-resistant material with breathability, such as ceramic fiber, is used. An ignition cap 8 is placed over the heat insulating materials 6 and 5 at the end of the candle 4 to which the igniter 3 is attached and at the outer periphery near the end. A core shield 9 is made of a thin metal plate made of steel or stainless steel, and is placed over a portion of the heat insulating material 5 other than the portion covered with the ignition cap 8 to reinforce each bundled core 1. 1 is a metal container in which a candle 4, heat insulating materials 5, 6, 7, an ignition cap 8, and a core shield 9 are prepared and sealed;
1 is a breathable heat insulating material such as ceramic fiber filled between the inner wall of the metal container 10 and the ignition cap 8, core shield 9, and heat insulating material 7; 12 is one end of the metal container 10; Use an electric or percussion type igniter installed in the 13 is a stopper for fixing the candle 4 at a predetermined position in the metal container 10;
14 is a cap that covers the other end of the metal container 10; 15 is an oxygen outlet provided in the cap 14;
6 is a seal for sealing the oxygen outlet 15; 17 is an absorbent filled in the inner space of the cap 14; and 18 is a gap formed between each core 1.

Effects of the invention Since the invention uses multiple cores bundled together as described above, the large-capacity press required when molding a single core with a large diameter is not required when molding the cores. , the core can be easily molded. Since the cross section of each core does not need to have a large diameter, it is easy to uniformly disperse chlorate, iron powder, etc. in the molded cross section, and the temperature gradient across the entire cross section of the bundled cores is reduced by the cross section of one core with a large diameter. is smaller than the temperature gradient at . Furthermore, although each core is affected by the heat generated by the surrounding cores, the bundled cores automatically adjust the reaction speed, and the reaction remains constant as a whole. Further, in order to stabilize the reaction rate, the ratio of the compounded substances in each core can be adjusted. In addition, if a single core with a large diameter is broken due to an impact, oxygen generation will be interrupted, which will have a serious effect on oxygen generation. Even if one or two of the cores break, as long as the other cores are normal, they will continue to generate oxygen, even if the amount of oxygen generated is somewhat reduced. Moreover, the voids formed between each core can be used as oxygen passages. Therefore, the present invention can provide an oxygen generator that has a higher oxygen generation rate and excellent oxygen generation performance than a conventional oxygen generator that uses one core.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a longitudinal cross-sectional view and FIG. 2 being an enlarged cross-sectional view. 1...Core, 3...Ignition agent, 5,6,7...Insulating material, 8...Ignition cap, 9...Core shield, 10...Metal container, 12...Ignition tool, 15... Oxygen intake port.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A candle consisting of a chlorate as a main ingredient and a cylindrical core with an ignition agent attached to one end is sealed in a metal container with a heat insulating material in between, In the oxygen generator, the metal container is provided with an igniter for igniting the ignition agent and an outlet for the oxygen generated during the thermal decomposition reaction of the core, wherein the core is composed of a plurality of cores. , and a plurality of cores are bundled so that their side surfaces are in close contact with each other, and the outer periphery of the cores is covered with a reinforcing material that reinforces each core. (2) The outer periphery and both ends of a candle made by adhering an ignition agent to one end of a plurality of bundled cores are covered with a breathable heat insulating material, and among the above candles,
Claim 1 of the Utility Model Registration Claim: An ignition cap is placed over the above-mentioned heat insulating material over the oxygen generation starting portion, and a core shield is placed over the above heat insulating material around the outer periphery other than the oxygen generation starting portion. oxygen generator.