JPS6126484B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a closed-type oxygen generator for assisting breathing, which is mainly used for emergencies.

<Prior Art> Conventionally, as this type of breathing assistance device, an oxygen mask in which oxygen is supplied from a pressure vessel, an emergency mask having a chemical oxygen generator, and the like are known.

〓Problems to be solved by the invention〓 However, with conventional devices of this kind, oxygen masks that use pressure vessels have the disadvantage of being heavy, and emergency masks that have chemical oxygen generating parts have the disadvantage of poor performance due to deterioration of chemicals. It has the following drawbacks.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a closed-type oxygen generator for respiratory support that is lightweight, inexpensive, and can withstand long-term storage.

<Means for Solving the Problems> In accordance with the above-mentioned object, the structure of the present invention, which is summarized in the above-mentioned claims, aims to solve the above-mentioned problems by introducing carbon dioxide gas, rather than oxygen gas, into the airtight container 4. The airtight container 4 is filled with a selective adsorbent 8 made of zeolite, which adsorbs water vapor more easily than carbon dioxide gas, and which has previously expelled other gases and adsorbed oxygen.
A normally sealed mouthpiece 1 is connected via a conduit 1a, and a check valve 2 is provided in the middle of the conduit 1a to allow exhaled air to flow only from the mouthpiece 1 in the direction of the closed container 4. In addition, an air reservoir 5 whose volume can be changed with small resistance is connected to the airtight container 4, and this air reservoir 5 is connected to a portion of the conduit 1a closer to the mouthpiece 1 than the check valve 2. They are connected by a conduit 6, and a technical measure is taken in which a check valve 3 is disposed in the middle of the conduit 6 to allow intake air to flow only in the direction of the mouthpiece 1 from the air reservoir 5.

〓Operation〓 Therefore, when using the sealed oxygen generating device for respiratory support of the present invention, the mouthpiece 1 is unsealed (specifically, the seal 7, which will be described later, is removed), and the mouthpiece 1 is opened. When you breathe with your mouth, first, when you exhale, the exhaled air passes through the check valve 2 and flows into the closed container 4, and the water vapor and carbon dioxide in the exhaled air are absorbed into the closed container 4. Oxygen that is adsorbed by the selective adsorbent 8 filled in the inside of the selective adsorbent 8 is released. The oxygen-enriched air that has passed through the closed container 4 is temporarily stored in an air reservoir tank 5.

Next, when the person inhales, the air in the air reservoir 5 that is supplemented with the oxygen necessary for respiration can be inhaled, and this action is repeated every time the person takes a breath.

Embodiments Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 4 is a closed container, and inside the closed container 4,
Since carbon dioxide gas is more easily adsorbed than oxygen, and water vapor is more easily adsorbed than carbon dioxide gas, a selective adsorbent 8 made of zeolite, which has previously expelled other gases and adsorbed oxygen, is filled. This airtight container 4 is usually suitable for carrying around 1 liter, and is approximately 1 liter in size.
Can be filled with 700gr selective adsorbent 8,
According to experiments, when synthetic zeolite (manufactured by Osaka Sanso Kogyo, trade name: Zeohalf) that has been sufficiently activated (passing other gases through a vacuum chamber, etc.) is used as the selective adsorbent 8. Approximately 3000 c.c. of pure oxygen is adsorbed at normal temperature and pressure, which is the medically announced standard oxygen consumption for Japanese people.
It was approximately 12 minutes per minute compared to 250c.c./minute.

A normally sealed mouthpiece 1 is connected to the airtight container 4 via a conduit 1a, and in the middle of this conduit 1a, exhaled air flows only from the mouthpiece 1 toward the airtight container 4. A check valve 2 is provided to allow this. In this application, the mouthpiece 1 is
It is not limited to the illustrated shape that can be held in the mouth, and may of course be a mask-like item that covers the nose, but in order to reliably guide exhaled air into the airtight container 4, breathing is mainly done through the mouth. Something is desirable. Further, the mouthpiece 1 can be sealed by pasting a non-porous membrane 7 on the opening of the mouthpiece 1 so that it can be easily removed.
An air-impermeable membrane that can be easily torn or an on-off valve (not shown) may be placed in the middle of a.

Further, an air reservoir 5 whose volume can be changed with small resistance is connected to the airtight container 4, and the mouthpiece 1 is connected to the air reservoir 5 and the check valve 2 of the conduit 1a.
The side parts are connected by a conduit 6, and a check valve 3 is disposed in the middle of the conduit 6 to allow intake air to flow only from the air reservoir 5 toward the mouthpiece 1. The air reservoir tank 5 whose volume can be changed with this small resistance is
It consists of a non-ventilated positive bag whose volume can be changed by changes in positive and negative pressure caused by breathing, or a bellows container as shown in FIG. 2. The air reservoir tank 5 in the example shown in FIG. 2 is housed in a closed container 4, and the outer periphery of the opening of the closed container 4 is tightly fixed to the inner periphery of the closed container 4 in an airtight manner. It goes without saying that it is desirable to open a through hole in the closed container 4 in the lower part of the air tank 4 to facilitate expansion and contraction of the air reservoir tank 5.

In addition, in the example shown in FIG. 2, by arranging a conduit 9 that communicates the conduit 1a and the air reservoir tank 5, a part of exhaled air flows directly into the air reservoir tank 5 without passing through the 8 layers of selective adsorbent. Here, it passes through 8 layers of selective adsorbent and mixes with oxygen-enriched air to obtain oxygen and carbon dioxide concentrations suitable for rebreathing. The amount of oxygen released by the selective adsorbent 8 is controlled so that oxygen that is more commensurate with the consumption amount is continuously replenished.

〓Effects of the Invention〓 The present invention is as described above, and since it is a closed type that does not involve breathing and exchange with outside air, when used in the event of a fire, there is no possibility of inhaling toxic gases generated with the fire. It is possible to provide a safe closed-type oxygen generator for assisting breathing, and it is also possible to use it underwater.

Moreover, since the present invention uses the air reservoir tank 5,
It is possible to provide a closed type oxygen generator for assisting breathing, which allows smooth exchange of inhaled air and exhaled air, and guarantees easy breathing as usual in an emergency.

In particular, the present invention has the effect of not causing deterioration even during extremely long-term storage due to the use of the selective adsorbent 8. The selective adsorbent 8 made of zeolite is a chemically extremely stable substance, and the adsorption of oxygen in its countless pores of several angstroms is mainly suction adsorption by ions and does not involve any chemical changes. There is no risk of generating any harmful gases, and there is no risk of deterioration even if stored for a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of one embodiment of the closed-type oxygen generating device for respiratory support according to the present invention, and FIG. 2 is a longitudinal sectional view of another embodiment. 1... Mouthpiece, 1a... Conduit, 2, 3...
...Check valve, 4...Airtight container, 5...Air reservoir, 6
... conduit, 7 ... non-porous membrane, 8 ... selective adsorbent, 9 ... conduit.

Claims (1)

[Scope of Claims] 1. A selective adsorbent 8 in a closed container 4, which is made of zeolite, which adsorbs carbon dioxide gas more easily than oxygen, and water vapor more easily than carbon dioxide gas, and which adsorbs oxygen by expelling other gases in advance. A normally sealed mouthpiece 1 is connected to the closed container 4 via a conduit 1a, and this conduit 1
A check valve 2 is arranged in the middle of the mouthpiece 1 to allow exhaled air to flow only in the direction of the closed container 4, and the closed container 4 is provided with an air reservoir 5 whose volume can be changed with small resistance. The mouthpiece 1 is connected to the air reservoir tank 5 and the check valve 2 of the conduit 1a.
A closed type breathing aid device in which a conduit 6 is connected to the side portion, and a check valve 3 is disposed in the middle of the conduit 6 to allow the flow of inhaled air from the air reservoir 5 only in one direction of the mouthpiece. Oxygen generator.