JPH09240585A - Respiring circuit of half-releasing type respirator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a respiring circuit of a half-releasing type respirator, by which respiration can be comfortably performed. SOLUTION: In a respiring circuit 2 of a half releasing-type respirator 1 for removing carbon dioxide gas from exhaust gas to be recovered through a mouthpiece 9 by a canister 5, auxiliarily adding respiration gas from a gas cylinder 7, and again feeding it to the mouthpiece 9, a material such as activated carbon 60 having offensive odor eliminating or preventing action is provided in the respiring circuit 2, and offensive smell contained in exhaust gas is eliminated and/or prevented in the respiring circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is of a type that removes carbon dioxide gas from respiratory air circulating in a breathing circuit, supplementarily supplies respiratory gas for the breathing circuit, and discharges excess respiratory air. The present invention relates to a breathing circuit of a semi-open breathing apparatus.

[0002]

2. Description of the Prior Art Semi-open breathing apparatus of this kind are generally
Carbon dioxide is removed from the breathing air that circulates in the breathing circuit equipped with a mouthpiece, a carbon dioxide adsorption device, and a breathing gas cylinder, and the excess breathing air is supplied while supplementarily supplying breathing gas from the breathing gas cylinder to the breathing circuit. Is discharged from the breathing circuit. That is, the exhaust blown out by the user is collected through the mouthpiece, and the carbon dioxide gas necessary for rebreathing is removed and oxygen is added to return to the mouthpiece.

[0003]

As described above, in the conventional semi-open breathing apparatus, the exhaust gas discharged by the user is treated even though the exhaust gas discharged by the user is treated and used for rebreathing. No treatment was applied to the odor. However, when the semi-open breathing apparatus is actually used, the breathing air sucked from the mouthpiece often has an odor. In this way, if there is an odor in the breathing air, an unstable psychological situation such as disgust during diving is created, and because of this impatience causes an increase in breathing volume,
Especially for beginners, the mental stress caused by this may lead to an accident in which diving is impossible.

The present invention therefore provides a breathing circuit for a semi-open breathing apparatus which is capable of removing the odor generated in the breathing circuit and allowing comfortable breathing.

[0005]

The features of the present invention for solving the above-mentioned problems include a mouthpiece, a canister for removing carbon dioxide from exhaust gas of a user collected through the mouthpiece, In a breathing circuit of a semi-open breathing apparatus including a gas cylinder for supplying breathing gas, a substance having a deodorizing or deodorizing action is provided in the breathing circuit.

A substance having a deodorizing effect may be provided by mounting it on a mouthpiece or the like in the form of a deodorizing filter, or by using a urethane sponge or the like at the entrance and exit of the canister, a deodorant,
For example, it may be provided by including activated carbon. Alternatively, it is also possible to separately prepare a breathable bag and dispose the deodorant in the bag and arrange the bag at an appropriate position in the breathing circuit. Furthermore, candy for deodorizing at the time of diving may be used in the same manner. According to this configuration, the odor contained in the respiratory air collected via the mouthpiece is deodorized or deodorized in the breathing circuit, so that the semi-open breathing apparatus can be comfortably used. Instead of, or in addition to, the substance having a deodorizing action, a substance having a deodorizing action may be used in the same manner.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 1, there is shown an exemplary embodiment of a semi-open breathing apparatus with a breathing circuit according to the present invention. The breathing circuit 2 of the semi-open breathing apparatus 1 is composed of a breathing bag 3, a canister (carbon dioxide adsorbing device) 5, a breathing gas cylinder (gas cylinder) 7 and a mouthpiece 9, and in the case of exhaust, a mouthpiece 9 The exhaust gas of the user discharged from the exhaust gas is supplied to the breathing bag 3 through the exhaust pipe 4 and the inflow hole 6, and in the case of inspiration, the breathed air in the breathing circuit 2 is discharged from the outflow hole 8 of the breathing bag 3. Then, it is supplied to the mouthpiece 9 through the canister 5 and the intake pipe 10. Also,
Oxygen gas is quantitatively and supplementarily supplied to the canister 5 from the breathing gas cylinder 7 via the pipe 25.

The intake pipe 10 and the exhaust pipe 4 connected to the mouthpiece 9 have a double pipe structure in which the intake pipe 10 is inside and the outside is surrounded by the exhaust pipe 4 in one pipe 14.
Since it is a tube, the semi-open breathing apparatus 1 can be easily attached and detached, the appearance of the entire apparatus is not spoiled, and the configuration of the entire apparatus can be simplified. Further, in the pipe 14, by adopting a double pipe structure in which the inner passage is the intake pipe 10, damage to the intake pipe side can be prevented even if the intake pipe 10 is damaged by an external force or the like, so that intake air can be secured. It can be planned.

The canister 5 is connected to the breathing bag 3 and the breathing gas cylinder 7, the intake pipe 15 is connected to an intake port 19 provided on one side thereof, and the intake pipe 10 is connected to the exhaust port 21. Has been done. Also, in the canister 5,
An adsorbent cartridge 16 filled with a carbon dioxide adsorbent is housed, and an inflow side passage 5a for air is formed on one side of the canister 5 and an outflow side passage 5b is formed on the other side.

The inflow passage 5a is provided with a drain valve 20 for receiving water that has entered from the intake pipe 10 or the like. If water should enter the canister 5, the water that has entered will enter the bottom of the canister 5. It is designed to guide to the water reservoir 5c formed in the. On the other hand, the outflow passage 5b is provided with an intrusion prevention valve 22 that prevents water from invading into the outflow passage 5b. Further, the adsorbent cartridge 16 is provided with a suction sponge 24 on the inflow side passage 5a side so that the inflowing water can be held to some extent before the adsorbent before it reaches the adsorbent. . This water absorbing sponge 24 can be made of urethane, for example. In the canister 5, there is provided an adsorbent cartridge forget-to-insertion prevention valve 26 that closes the inflow / outflow side passage 5b when the adsorbent cartridge 16 is forgotten to be inserted.

The breathing bag 3 comprises a bag body 29 and an inner breathing bag 27.
It is a double bag structure consisting of. The bag body 29 is formed in a bellows shape using an elastic material such as rubber, and expands and contracts in a direction indicated by an arrow A in FIG.

An inflow hole 6 and an outflow hole 8 are formed in a base 29a of the bag body 29, and a valve unit 30 capable of discharging the breath air in the bag body 29 is provided on one side thereof. It is provided. The valve unit 30 discharges respiratory air when the bag body 29 expands and a predetermined amount of respiratory air is accumulated.

The inner breathing bag 27 is provided inside the bag body 29.
A communication hole 28 that is provided so as to cover the outflow hole 8 and that communicates with the inflow hole 6 is formed at a position apart from the outflow hole 8. Thus, in the present embodiment, the outflow hole 8 and the communication hole 2
8 is formed at a position apart from each other, so that the bag main body 29
Even when water flows in, it becomes more difficult for the eluate to flow into the communication hole 28. Similarly, it is possible to prevent the eluent flowing from the outflow hole 8 from flowing into the inflow hole 6.

Like the outer bag 29, the inner breathing bag 27 is made of an elastic material such as rubber in a bellows shape.
As the breathing air flows in and out, the air expands and contracts in the direction indicated by the arrow A, like the outer bag 29.

The mouthpiece 9 includes an intake valve 11 and an exhaust valve 1.
The intake valve 11 and the exhaust valve 13 are check valves, respectively. In the case of intake, only the intake valve 11 is opened, and in the case of exhaust, only the exhaust valve 13 is opened. The exhaust valve 13 is an on / off valve provided by the diaphragm 33.

A diaphragm 33 is arranged on one side of the casing 31 of the mouthpiece 9 so that the diaphragm 33 expands according to the internal pressure in the casing 31.

The exhaust valve 13 comprises an exhaust valve body 35 and a coil spring 37 as a biasing means for biasing the exhaust valve body 35 in a closing direction. It is designed to close the exhaust port. Exhaust valve body 3
The rear end of the coil 5 is connected to the diaphragm 33, and the expansion of the diaphragm 33 causes the coil spring 37 to move.
The exhaust valve element 35 is moved against the urging force of (1) to open the exhaust port.

An intake valve 11, which is a flexible intake valve body made of a flexible material, is provided at an intake port to which the intake pipe 10 is connected, and the flexible intake valve 11 is provided in the casing 3.
It deforms according to the internal pressure in 1 to open the intake port.

Further, the casing 31 is provided with a drain valve 41 for discharging water that has entered the casing.
The drain valve 41 is composed of a drain valve body that sits at the drain port and closes the drain port, and a coil spring that biases the drain valve body. It is a known one that opens the drainage port by pressing.

A lever 39 is connected to the diaphragm 33 so that when the diaphragm 33 is deformed more than a predetermined amount, oxygen is introduced from the gas cylinder 7 into the casing 31 of the mouthpiece 9.

Since the breathing circuit 2 of the semi-open breathing apparatus 1 is constructed as described above, the exhaust gas discharged from the mouth of the user passes through the exhaust valve 13 and the exhaust pipe 4 and the exhaust pipe of the breathing bag 3. 4 and then into the inner breathing bag 27 through the communication hole 28 and through the intake pipe 15 to the canister 5
It is led to.

Exhaust gas that has entered the canister 5 passes through the adsorbent cartridge 16 from the inflow side passage 5a and the outflow side passage 5
At this time, the sponge 24 for absorbing water of the adsorbent cartridge 16 is for the purpose of removing the carbon dioxide gas contained in the exhaust gas and simultaneously deodorizing the odor contained in the exhaust gas.
It is configured to include activated carbon 60 that works as a deodorant.

FIG. 2 shows a sectional view of the canister 5 of FIG. 1 taken along the line XX. As can be seen from FIG. 2, the adsorbent cartridge 16 is provided so as to be sandwiched by a pair of partition walls 52, 52 for forming the outflow side passage 5b provided in the cylindrical casing 51 of the canister 5. , The adsorbent 16 in the case 16a
b is filled. Activated carbon 60 is contained in the water-absorbing sponge 24 which is arranged inside the case 16a and fixed inside the case 16a with an adhesive. As a result, when the exhaust gas discharged into the mouthpiece 9 passes through the canister 5, deodorization of the exhaust gas and removal of carbon dioxide gas are performed at the same time, so the exhaust gas is supplied from the canister 5 into the mouthpiece 9 through the intake pipe 10. The breathing air contains a required amount of oxygen and is deodorized, and the breathing air supplied by the mouthpiece 9 allows comfortable breathing.

In the above embodiment, the structure in which the water absorbent sponge 24 of the adsorbent cartridge 16 contains the activated carbon 60 as the deodorant has been described as an example, but the structure of the present invention is not limited to this. For example, in addition to activated carbon, a known appropriate deodorant may be used as a material for the deodorant, or a known deodorant may be used instead of or in addition to the deodorant.

Further, in addition to the form in which the deodorant and deodorant of this kind are contained in the water absorbing sponge 24 of the adsorbent cartridge 16, an appropriate deodorant is contained in the air-permeable bag 70 as shown in FIG. Alternatively, the deodorant 71 may be put in and provided at an appropriate position in the breathing circuit 2.

[0027]

According to the present invention, the breathing circuit is provided with a substance having a deodorizing and / or deodorizing action in an appropriate form, thereby eliminating the odor of the breathing air supplied to the mouthpiece. You can breathe comfortably without worrying about it, you can breathe stably without aversion during diving, you can suppress unnecessary increase in breathing volume, and mental stress caused by odor to the user. It is possible to expect an effect such as not causing it.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of an embodiment of a semi-open type breathing apparatus having a breathing circuit apparatus according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a perspective view showing an appearance of a cartridge in which a deodorant and / or a deodorant is put in a bag.

[Explanation of symbols]

 1 Semi-open breathing apparatus 2 Breathing circuit 5 Canister 7 Breathing gas cylinder 9 Mouthpiece 24 Sponge for water absorption 60 Activated carbon

Claims (1)

[Claims] 1. A semi-open breathing system comprising a mouthpiece, a canister for removing carbon dioxide from user exhaust collected through the mouthpiece, and a gas cylinder for supplying breathing gas. In the breathing circuit of the device,
A breathing circuit for a semi-open breathing apparatus, wherein a substance having a deodorizing or deodorizing action is provided in the breathing circuit.