JPH0829752B2 - Diving semi-closed scuba - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a semi-closed scuba for diving,
In particular, it relates to a semi-closed scuba for diving, which can prevent deterioration due to moisture.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view of a conventional semi-closed scuba for diving. 1 is a cylinder for supplying breathing gas, 2 is a regulator, 3 is a flow rate adjusting mechanism, 4 is an expandable breathing bag, and 5 is An exhaust valve, 6 is a carbon dioxide gas adsorber, 7 is a mouthpiece, 8 is an intake hose, and 9 is an exhalation hose.

In this semi-closed scuba for diving, a fixed amount of breathing gas from the gas cylinder 1 is injected into the breathing bag 4 through the regulator 2, and this fresh gas and carbon dioxide gas are removed by the carbon dioxide gas absorber 6. Breathing gas is breathing bag 4
It is mixed inside and inhaled by the diver. The mouthpiece 7 has a check valve so that the exhaled air does not flow to the inspiratory side and is sent to the exhaled hose 9. The exhaled gas passes from the exhaust hose 9 to the carbon dioxide adsorber 6, where carbon dioxide is removed and sent to the breathing bag 4, and this cycle is repeated.

[0004]

However, the exhaled air of the diver contains water, and when the diver breathes, a small amount of water may enter the exhalation hose from the outside. In the conventional semi-closed scuba for diving, these water contents are guided to the carbon dioxide adsorber 6 and
There is a risk that the function will be deteriorated and that it will accumulate in the breathing bag 4 and enter the intake hose 8 due to the inclination during diving.

The present invention is intended to eliminate the above drawbacks.

[0006]

The semi-closed scuba for diving of the present invention comprises a stretchable breathing bag to which breathing gas is supplied, and an inhalation for communicating between the breathing bag and the inhalation side of the mouthpiece. A hose and an exhalation hose,
A structure having a carbon dioxide adsorption mechanism inserted in the intake hose and a moisture removing mechanism for absorbing and discharging moisture in the breathing bag by expanding and contracting the breathing bag is adopted. Further, in addition to the above configuration, the present invention is a stretchable auxiliary bag inserted in a portion of the intake hose on the mouthpiece side of the carbon dioxide adsorption mechanism, and the auxiliary bag is compressed by a predetermined amount or more. Occasionally, a configuration including a mechanism for supplying breathing gas into the auxiliary bag is adopted.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 1, the carbon dioxide gas adsorber 6 is inserted in the path of the intake hose 8, and the auxiliary bag 10 which can expand and contract is interposed between the carbon dioxide gas adsorber 6 and the mouthpiece 7. Insert this auxiliary bag 10
Respiratory gas is supplied from the cylinder 1 through the opening / closing valve 11 that opens when the auxiliary bag 10 is compressed to a predetermined amount or more, and moisture is removed to remove moisture in the breathing bag 4. A mechanism 12 is provided.

FIG. 2 shows an auxiliary bag 10 and a water removing mechanism 12.
13 is a bellows of the water removing mechanism 12 whose upper and lower ends are fixed to the upper and lower plates 14 and 15 of the breathing bag 4, respectively, and 16 is the bellows 13.
A slit 17 for absorbing water is formed at the lower end of the breathing bag 4 for communicating the inside of the bellows 13 with the outside.
A drainage port penetrating the lower plate 15, a check valve 18 for closing the drainage port 17 when the bellows 13 has a negative pressure, and a communication port 19 for communicating between the breathing bag 4 and the carbon dioxide adsorber 6. This is a ventilation guide bellows provided as a portion of the intake hose 8 for carrying out.

Since the semi-closed scuba for diving of the present invention is constructed as described above, the exhalation from the exhalation side of the mouthpiece 7 is guided directly to the breathing bag 4 via the exhalation hose 9 so that the water in the exhalation and the mouse are exhaled. Water entering from the outside through the piece 7 does not directly add to the carbon dioxide gas adsorber 6.

Further, the difficulty of intake due to the carbon dioxide adsorber 6 inserted on the intake side can be easily eliminated by the action of the auxiliary bag 10.

That is, when the amount of gas in the auxiliary bag 10 is reduced and the auxiliary bag 10 is compressed to a desired amount or more, the on-off valve 11 is opened and breathing gas is directly supplied from the cylinder 1 into the auxiliary bag 10. Therefore, the difficulty of intake is eliminated.

Further, even if water is accumulated in the breathing bag 4, the bellows 13 of the water removing mechanism 12 is simultaneously extended when the breathing bag 4 is expanded, and the check valve 18 is closed at this time, so that the water is removed. The inside of the bellows 13 of the bag 12 has a negative pressure, so that the moisture in the breathing bag 4 is sucked into the bellows 13 through the slit 16.
This moisture sucked into the bellows 13 is discharged to the outside through the check valve 18 when the breathing bag 4 is compressed and at the same time the bellows 13 of the moisture removing mechanism 12 is compressed.

[0014]

According to the semi-closed scuba for diving of the present invention, there is a great advantage that the deterioration of the carbon dioxide adsorber 6 due to moisture can be reduced and the moisture accumulated in the breathing bag 4 can be automatically removed.

[Brief description of drawings]

FIG. 1 is an explanatory view of a semi-closed scuba for diving of the present invention.

FIG. 2 is a sectional view of a main part of the semi-closed scuba diving machine of the present invention.

FIG. 3 is an explanatory diagram of a conventional semi-closed scuba for diving.

[Explanation of symbols]

 1 cylinder 2 regulator 3 flow adjustment mechanism 4 breathing bag 5 exhaust valve 6 carbon dioxide adsorber 7 mouthpiece 8 intake hose 9 exhalation hose 10 auxiliary bag 11 on-off valve 12 water removal mechanism 13 bellows 14 upper plate 15 lower plate 16 slit 17 drainage Mouth 18 Check valve 19 Ventilation guide bellows

Claims (2)

[Claims] 1. A stretchable breathing bag to which breathing gas is supplied, an inhalation hose and an exhalation hose that respectively connect the inhalation side and the exhalation side of the breathing bag and the mouthpiece, and carbon dioxide inserted in the inspiration hose. A semi-closed scuba for diving, comprising a gas adsorption mechanism and a water removal mechanism for absorbing and discharging water in the breathing bag by expanding and contracting the breathing bag. 2. The stretchable auxiliary bag inserted in the portion of the intake hose on the mouthpiece side of the carbon dioxide adsorption mechanism, and the auxiliary bag compressed by a predetermined amount or more according to claim 1. The semi-closed scuba for diving, further comprising a mechanism for supplying breathing gas into the auxiliary bag.