JPH0725385A - Semi-closed respiratory device - Google Patents

Abstract

PURPOSE:To provide a semi-closed respiratory device capable of reducing exhale sound of excessive respiratory air. CONSTITUTION:A semi-closed respiratory device 1 is provided with a canister 5 for removing carbon dioxide from respiratory air, a respiratory bag 3 expanded and contracted by innaling and exhaling the respiratory air, and a gas cylinder 7 for replenishing respiratory gas to a respiratory circuit. The respiratory gas is replenished while removing the carbon dioxide from the respiratory air circulating through a respiratory circuit. Excessive respiratory air in the respiratory circuit is exhaled. Many bores 32a for finely dividing the bubbles of the exhaled respiratory air are formed at the part for exhaling the excessive respiratory air. The respiratory air exhaled in water is finely divided into small bubbles to reduce exhale sound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breathing apparatus used in water, and more particularly, to a semi-closed breathing apparatus which removes carbon dioxide from breathing air circulating in a breathing circuit and uses the breathing air.

[0002]

BACKGROUND OF THE INVENTION Semi-closed breathing apparatus generally include breathing bags,
Equipped with a valve unit, canister (carbon dioxide adsorption device), and breathing gas cylinder to remove carbon dioxide from the breathing air circulating in the breathing circuit, while supplying breathing gas to the breathing circuit while breathing excess breath from the breathing circuit. It is designed to discharge air.

In this type of conventional semi-closed breathing apparatus, as disclosed in Japanese Patent Laid-Open No. 243495/1993,
A valve is provided on the breathing bag, and when the breathing bag extends beyond a predetermined value, the valve opens to discharge excess breath air in the breathing circuit.

[0004]

However, when the valve of the breathing bag is opened to discharge the excess breath air, when the valve is opened, the excess air is discharged at once through the valve opening. Excess breath air is discharged into the water as relatively large bubbles.

As described above, when the excess respiratory air is discharged as large air bubbles, a large sound of "bubbling" is generated in the water, and nearby fish are surprised by the sound and escape, so that they can enjoy swimming underwater. However, there is the inconvenience that it is difficult to observe the ecology of aquatic life.

Therefore, an object of the present invention is to provide a semi-closed breathing apparatus which can reduce the exhaust sound of the excessive breath air.

[0007]

In order to achieve the above object, the present invention provides a canister for removing carbon dioxide gas from respiratory air, a breathing bag that expands and contracts due to inflow and outflow of respiratory air, and breathing gas to a breathing circuit. In a semi-closed breathing apparatus that is equipped with a gas cylinder for replenishing, replenishes the breathing gas while removing carbon dioxide from the breathing air circulating in the breathing circuit, and discharges the excess breathing air in the breathing circuit. Is characterized in that a large number of fine pores for dividing the bubbles of breathing air to be discharged are formed.

[0008]

In the semi-closed breathing apparatus of the present invention, the surplus breath air discharged from the breathing circuit is discharged into water after passing through a large number of pores. Therefore, the discharged breathing air is subdivided into fine air bubbles, so that the discharged sound is reduced.

As a method of forming pores, a cover with pores is provided at the discharge location of breathing air, a pore is formed at the discharge port itself, or a case of a semi-closed breathing apparatus is provided with fine holes. Form a hole.

[0010]

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 6 of the accompanying drawings.

As shown in FIG. 1, a semi-closed breathing apparatus 1 according to an embodiment of the present invention comprises a breathing bag 3, a canister (carbon dioxide adsorbing device) 5, a breathing gas cylinder 7 and a mouthpiece 9. In the case of exhaust, the respiratory air discharged from the mouthpiece 9 passes through the exhaust pipe 4 and enters the inflow hole 6
In the case of inspiration, the respiratory air in the breathing circuit is supplied from the outflow hole 8 of the respiratory bag 3 through the canister 5, the inspiratory tube 10 and the mouthpiece 9 in the case of inspiration. Further, the canister 5 is supplied with air quantitatively 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. There is.

As described above, since the pipe 14 is a single pipe having a double pipe structure in which the intake pipe 10 connected to the mouthpiece is arranged inside the exhaust pipe 4, the detachment of the semi-closed breathing apparatus is possible. The operation is easy, the appearance of the entire apparatus is not spoiled, and the configuration of the entire apparatus can be simplified.

Further, in the pipe 14, the intake pipe 10 has a double pipe structure in which the inner passage is the intake pipe 10.
Since the intake pipe side can be prevented from being damaged even when is damaged by an external force or the like, intake can be secured.

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 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, the invaded water will reach the bottom of the canister 5. It guides to the formed water storage part 5c. 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. Also,
The adsorbent cartridge 16 is provided with a water-absorbing sponge 24 on the side of the inflow passage 5a so that the inflowing water can be held to some extent before the adsorbent before it reaches the adsorbent.

In the canister 5, there is provided a valve 26 for preventing forgetting to insert the adsorbent cartridge 16 which closes the inflow / outflow side passage 5b when the adsorbent cartridge 16 is forgotten to be inserted.

The breathing bag 3 includes 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 from 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 for exhausting breathing air in the bag body 29 is provided on one side thereof. . 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 18 and that communicates with the inflow hole 6 is formed at a position apart from the outflow hole 8. In this way, in this embodiment, by forming the outflow hole 8 and the communication hole 28 at positions separated from each other, even if water flows into the bag body 29, it becomes more difficult to flow into the communication hole 28. Similarly, the eluate that has flowed in from the outflow hole 8 is
Can be prevented from flowing into.

Like the outer bag 29, the inner breathing bag 27 is formed in a bellows shape from an elastic material such as rubber, and expands and contracts in the direction shown by the arrow A in the same manner as the outer bag 29 by the inflow and outflow of breath air. To do.

As shown in more detail in FIGS. 2 and 3, the valve unit 30 includes a valve body 30c which is seated on the valve seat 30a and closes the valve opening 30b, and the valve body 30c is biased toward the valve seat 30a. And a cord 30g that is connected to the breathing bag 3 at one end and moves the valve body 30c against the spring 30d when the breathing bag extends beyond a predetermined length. Is provided with a valve case 30f having a discharge slit 30e formed therein. On the outside of the valve case 30f,
A cover 32a having a large number of pores 32a formed thereon is covered, and the surplus air discharged from the discharge slit 30e is discharged as innumerable fine bubbles.

As shown in FIG. 1, the mouthpiece 9 is provided with an intake valve 11 and an exhaust valve 13, and the intake valve 11 and the exhaust valve 1 are provided.
3 is a check valve, and in the case of intake, intake valve 1
Only 1 is opened, and in the case of exhaust, only the exhaust valve 13 is opened. The exhaust valve 13 is an on / off valve that is a diaphragm.

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

The exhaust valve 13 is provided with 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 portion 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.

A flexible intake valve body 11 made of a flexible material is provided at the intake port to which the intake pipe 10 is connected, and the flexible intake valve body 11 has an internal pressure inside the casing 31. It deforms according to and opens the intake port.

The casing 31 is further 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 on the drain port and closes the drain port, and a coil spring that biases the valve body, and presses the valve body against the biasing force of the coil spring. By doing so, the drain port is opened.

A lever 39 is connected to the diaphragm 33 so that when the diaphragm 33 is deformed more than a predetermined amount, air is introduced from the breathing gas cylinder 7.

Next, the operation of this embodiment will be described.

When the user holds the mouthpiece 9 and exhausts air, the intake valve 11 of the mouthpiece 9 closes and the exhaust valve 1
3 is opened and the exhaust gas flows into the breathing bag 3 through the exhaust pipe 4. Thereby, the bag body 29 is expanded in the case 27 in the arrow A direction. Next, when the user inhales, the intake valve 11 opens at the mouthpiece 9 and the exhaust valve 13 opens.
Is closed, the breathing bag 3 is contracted, and the breathing air in the bag body 3 flows into the canister 5 from the outflow hole 8. In the case of inspiration,
Breathing air in the breathing circuit flows into the canister 5 from the outflow hole 8 of the breathing bag 3, where carbon dioxide in the breathing air is adsorbed and supplied to the mouthpiece 9 through the intake pipe 10. Then, the canister 5 is quantitatively supplied with air from the breathing gas cylinder 7 to the connection side of the intake pipe 10 via the pipe 25.

The breathing bag 3 expands and contracts in response to the user's breathing, and when the breathing bag 3 extends beyond a predetermined length (more than the length of the cord 30g), the valve body 30c resists the spring 30d and the valve seat 30a.
Away, the valve port 30b is opened, and excess air in the breathing bag 3 is discharged. The air discharged from the valve port 30b is discharged from the slit 30e of the valve case 30f, but the discharged air does not go into the water as it is, but passes through the pores 32a of the cover 32 and is discharged into the water. Therefore, the discharged air (excess respiratory air) is finely divided by the pores 32a and then discharged.

Since the discharged air becomes finer as described above, the discharge sound is less likely to be generated or the discharge sound is reduced, so that the generation of a loud sound such as a conventional "buzz" sound can be prevented. Therefore, even when approaching aquatic organisms such as fish during underwater observation, these aquatic organisms are unlikely to escape.

Further, since the discharged air becomes finer and gradually discharged, the change in buoyancy is small and the underwater balance is easily maintained as compared with the case where the discharged air is discharged all at once.

Next, another embodiment of the present invention will be described.
In other embodiments described below, the same parts as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the embodiment shown in FIGS. 4 and 5, the canister 5, the breathing bag 3, the breathing gas cylinder 7 and the like are housed in the case 51 of the semi-closed breathing apparatus, and a large number of pores 32a are formed in the front of the case 51. Is formed. In the case of this embodiment, since the existing case is used, there is no need for a separate member having pores, and therefore the configuration can be simplified.

In the embodiment shown in FIG. 6, the entire case of the semi-closed breathing apparatus is made of a porous material such as sponge. As described above, when the sponge is used for the case itself, it is not necessary to form pores, and it is lightweight and can be contracted and reduced when not in use, which is convenient for carrying.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified without departing from the gist of the present invention.

[0038]

The breathing bag of the semi-closed breathing apparatus of the present invention comprises:
In the semi-closed breathing apparatus of the present invention, since the excess breath air discharged from the breathing circuit is discharged into the water through the large number of pores, the breath air discharged into the water is subdivided. Since the air bubbles are formed into fine bubbles, the discharged sound can be reduced.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a semi-closed breathing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a portion of a valve unit of the semi-closed breathing apparatus shown in FIG.

FIG. 3 is a plan view of a cover having pores formed therein.

FIG. 4 is a plan view showing a case of a semi-closed breathing apparatus according to another embodiment.

5 is a plan view showing a state in which the case shown in FIG. 4 is opened.

FIG. 6 is a plan view showing a case of a semi-closed breathing apparatus according to still another embodiment.

[Explanation of symbols]

 1 Semi-closed breathing apparatus 3 Breathing bag 5 Canister 7 Gas cylinder 32a Pore

Claims (1)

[Claims] 1. A canister for removing carbon dioxide from breath air, a breathing bag that expands and contracts due to inflow and outflow of breath air, and a gas cylinder for supplementing breathing gas to the breathing circuit. In a semi-closed breathing apparatus that removes gas and replenishes breathing gas, and also discharges excess breath air in the breathing circuit, a large number of subdivided air bubbles in the breath air are discharged to the portion that discharges the excess breath air. The semi-closed breathing apparatus characterized in that the pores are formed.