JPH0679008A - Semi-closed respirator - Google Patents

Abstract

PURPOSE:To drain the water stagnated in a mouthpiece by the pressure of the respiration gas in a cylinder supplied into the mouthpiece. CONSTITUTION:An expiratory tube 55, an inspiratory tube 56 and the respiration gas supply pipe connected to a respiration gas tank are connected to the respiratory cavity 30 of a mouthpiece unit 5 and an exhaust and drain port having an exhaust and drain valve on the side opposite to a mouthpiece and the opening and closing valve connected to a demand lever closing the expiratory tube when a respiration gas supply tube is opened are provided and the respiration gas from the respiration gas supply tube is guided by operating the opening and closing valve of the expiratory tube to raise the pressure in the respiratory cavity to discharge the water penetrating in the respiratory cavity to the outside of the respiratory cavity. A bellows pump 35 and a water collecting chamber 38 provided with a drain port 41 having a check valve 40 are provided in the respiration bag connecting the expiratory tube and the inspiratory tube and the water collected in the water collecting chamber is discharged from the drain port of the water collecting chamber by operating the bellows pump by the respiratory action of a user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-closed breathing apparatus for underwater or land use, and more particularly to a semi-closed breathing apparatus for diving and fire fighting. Further, the present invention is for a water or land type of a type in which an intake gas from a compressed air cylinder or an oxygen cylinder is mixed with the user's exhaled gas, and carbon dioxide gas is absorbed from this mixed gas and returned to the user as an intake gas. Semi-closed breathing apparatus, especially for diving and fire fighting.

[0002]

2. Description of the Related Art Breathing devices for underwater or land use are roughly classified into an open breathing device, a semi-closed breathing device and a closed breathing device. The open-type breathing apparatus uses a compressed air cylinder as a supply gas source, for example, and expels all the exhaled air into the water, etc. Have to be big,
There was a problem that the weight increased.

On the other hand, the semi-closed breathing apparatus includes, for example, an expiratory flow passage connected to the expiratory side of the mouthpiece, a respiratory gas supply passage connected to a respiratory gas source, and an inspiratory flow passage connected to the inspiratory side of the mouthpiece. And an air bag having an exhaust valve, that is, a breathing bag, a carbon dioxide absorption device provided in the expiratory flow path, and a breathing gas cylinder connected to the breathing gas supply flow path, to absorb and remove carbon dioxide from the breathing gas circulating in the breathing circuit. The breathing gas that has absorbed and removed this carbon dioxide is mixed with a small amount of new breathing gas, introduced into the breathing bag, and the excess breathing gas is discharged from the exhaust valve. The structure is similar to that of the semi-closed breathing apparatus, but an exhaust valve is not provided so as to prevent excess breathing gas from being discharged to the outside.

[0004]

In such a closed-type breathing apparatus or semi-closed-type breathing apparatus, since the breathing bag is formed by a bellows or the like so as to be inflatable and compressible,
In the case where the breathing bag is attached to the back, for example, when the diver maintains a standing posture in the water, normal breathing is possible, but the water pressure on the breathing bag and the lungs of the diver are The difference in water pressure exerted acts to inflate or deflate the breathing bladder. Therefore, when the diving person keeps the prone posture, the breathing bag inflates and the pressure becomes low. When the diving person keeps the supine posture, the breathing bag contracts and the pressure increases. Therefore, the diving person feels suffocation in the prone posture compared to the supine posture because the pressure is different and the breathing action is different when the prone posture is maintained and when the supine posture is maintained. It has become a problem.

In the semi-closed diving respiration apparatus, the mouthpiece is taken into the mouth for inhalation. However, since the pressure in the circuit is the same as the external pressure when inhaling, generally, Water cannot be avoided from entering the mouthpiece unit. Then, when the water that has entered the mouthpiece enters the carbon dioxide absorption device from the mouthpiece unit, it reacts with the carbon dioxide absorbent to generate strong alkaline water or reduce the carbon dioxide absorption function. This is a problem.

Therefore, conventionally, in order to drain the water that has entered the mouthpiece unit, the water leakage prevention valve provided in the mouthpiece unit is manually operated and opened, and the water is discharged together with the exhalation. It is necessary to be proficient in handling the inundation prevention valve in this draining work, and
When handling the flood protection valve, when the mouthpiece comes off against the intention of the diver, the protection valve does not work, and there is a danger that water will enter the respiratory circuit via the expiratory tube. .

The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to mount a carbon dioxide gas absorbing device or a carbon dioxide absorbing device on the outside of a breathing bag and use it as a weight to lie down in a prone position. In the case of posture and the case of supine posture,
It is an object of the present invention to provide a semi-closed breathing apparatus, in particular, a semi-closed breathing apparatus for diving, in which the pressure fluctuation in the breathing bag is reduced so that the breathing action can be performed in substantially the same state.

Another object of the present invention is to supply a relatively high pressure breathing gas from a cylinder into the mouthpiece unit by a simple operation, and the water retained in the mouthpiece unit is removed by the pressure of the breathing gas. It is an object of the present invention to provide a semi-closed breathing apparatus for draining water, particularly a semi-closed breathing apparatus for diving and fire fighting.

Further, according to the present invention, the suction and discharge actions of the pump in the breathing bag forcefully sucks the water in the breathing bag into the pump and discharges the water into the water collecting chamber located below the pump. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-closed breathing apparatus for opening a check valve and forcibly discharging it to the outside of a water collection chamber, particularly a semi-closed breathing apparatus for diving and fire fighting.

[0010]

That is, the present invention relates to a breathing bag which is connected to a mouthpiece unit, an inspiratory flow path of the mouthpiece unit, and an expiratory flow path of the mouthpiece unit, and further includes an exhaust valve. A semi-closed breathing apparatus including a pressurized breathing gas tank connected to the breathing bag and a carbon dioxide gas absorption device, the breathing bag including a lower support plate and an intermediate plate, and a bellows between the lower support plate and the intermediate plate. The auxiliary breathing bag is provided with the intermediate plate and the top plate, and the bellows is provided between the intermediate plate and the top plate. The lower support plate is formed by inserting a pressurized breathing gas supply pipe connected to a breathing gas supply control valve at a position adjacent to the main breathing bag with the intermediate plate interposed therebetween. , With an opening for exhalation to be connected to the exhalation flow path from the breathing chamber of the mouse piece unit,
A drainage port is provided, the intermediate plate is provided with an opening for exhalation, the top plate is formed with a protrusion toward the intermediate plate, a carbon dioxide absorption device is attached,
In the breathing bag, a tubular bellows whose end plate is fixed to the intermediate plate and which is provided toward the drainage port of the lower support plate has an open end portion of the tubular bellows when the breathing bag is inflated. A water collecting chamber is provided with a length that forms a narrow gap around the drainage port of the lower support plate, and a water collecting chamber is formed below the drainage port, and has a drainage drainage port having a check valve at the bottom thereof. In the auxiliary breathing bag, the flow path for exhalation is formed by hermetically enclosing a bellows between the gas inlet of the carbon dioxide absorbent and the expiratory opening of the intermediate plate. The control valve for supplying breathing gas provided in the auxiliary breathing bag is provided with a control arm having a length capable of contacting the protrusion of the top plate when the auxiliary breathing bag is compressed. The valve was in contact with the protrusion of the top plate In addition, the breathing gas supply control valve is opened, and the carbon dioxide absorption device provided on the top plate is formed so as to act as a counterweight. On the device.

The present invention also includes a mouthpiece unit,
A breathing bag connected to the inspiratory flow passage of the mouthpiece unit and connected to the expiratory flow passage of the mouthpiece unit, and further provided with a breathing bag, a pressurized breathing gas tank connected to the breathing bag, and a carbon dioxide absorbing device In the semi-closed breathing apparatus, the breathing bag includes a lower support plate and an intermediate plate, and is surrounded by a bellows between the lower support plate and the intermediate plate,
The breathing gas supply hole connected to the breathing gas supply control valve is provided, and the auxiliary breathing bag includes the intermediate plate and the top plate, and the intermediate plate and the top plate are surrounded by a bellows. The main respiratory bag and the intermediate plate are formed adjacent to each other with a pressurized breathing gas supply pipe connected to a breathing gas supply control valve inserted between the lower support plate and the mouthpiece unit. The inspiratory flow passage and the expiratory flow passage from the breathing chamber are provided with an inspiratory opening and an expiratory opening that are respectively connected to each other, and a drain outlet is provided, and the intermediate plate is provided with an inspiratory opening and an inspiratory opening. The top plate is provided with an opening for exhalation, and the top plate is formed with a protruding portion toward the intermediate plate, and a carbon dioxide absorption device is attached to the top plate. Opening for intake of the intermediate plate The mouth is a tubular shape in which a flow path for inhalation is formed by being enclosed and enclosed by a bellows, and an end plate is fixed to the intermediate plate in the breathing bag and provided toward the drain port of the lower support plate. The bellows is provided with a length that forms a narrow gap around the open end of the tubular bellows and the drainage port of the lower support plate when the breathing bag is inflated, and the water collecting chamber is A drainage outlet is provided below the drainage outlet and has a check valve at the bottom thereof, and in the auxiliary breathing bag, the flow path for the exhalation is the gas inlet of the carbon dioxide absorbing device and the It is formed by hermetically enclosing the opening for exhalation of the intermediate plate with a bellows, and the breathing gas supply control valve provided in the auxiliary breathing bag is provided with the top plate of the top plate when the auxiliary breathing bag is compressed. Has a length that can contact the protrusion The control valve is provided with a control arm, and the control valve opens the breathing gas supply control valve when the control valve comes into contact with the projecting portion of the top plate. The carbon dioxide absorption device is provided on the top plate. Is a semi-closed breathing apparatus mouthpiece unit, characterized in that it is formed to act as a counterweight,
A semi-closed type that is connected to the inspiratory flow path of the mouthpiece unit and to the expiratory flow path of the mouthpiece unit, and further has a breathing bag equipped with an exhaust valve, a pressurized breathing gas tank connected to the breathing bag, and a carbon dioxide absorption device. In the breathing apparatus,
The breathing bag includes a lower support plate, an intermediate plate and a top plate, and is formed by enclosing a bellows between the respective plates, and a breathing gas connected between the lower support plate and the intermediate plate is connected to a respiratory gas supply control valve. A main breathing bag in which a gas supply hole is formed is formed, and an auxiliary breathing bag in which a pressurized breathing gas supply pipe connected to a breathing gas supply control valve is inserted is formed between the intermediate plate and the top plate. The lower support plate,
A hole for inhalation and a hole for expiration and a drain hole which communicate with the breathing chamber of the mouthpiece unit are formed, the intermediate plate is formed with a hole for inhalation and a hole for expiration, and the top plate is
A contact portion projecting inward is formed, and a carbon dioxide absorbing device is attached. Inside the main breathing bag, a bellows is provided between an intake hole of a lower support plate and an intake hole of an intermediate plate. A bellows that is airtightly connected to the end plate fixed to the lower surface of the intermediate plate above the drainage hole of the lower support plate is formed by enclosing and enclosing a flow path for inhalation, when the main breathing bag is inflated, It is provided with a length that forms a narrow gap around the lower end of the bellows and the drainage hole, and below the drainage hole, a water discharge chamber having a drainage outlet having a check valve at the bottom is formed, In the auxiliary breathing bag, a flow path for exhalation is formed by sealingly enclosing a bellows between the gas inlet of the carbon dioxide absorbing device and the hole for exhalation of the intermediate plate, and in the auxiliary breathing bag, The control valve for breathing gas supply should not come in contact with the contact part of the top plate. A semi-closed breathing apparatus is provided with a control arm for opening the control valve, and the carbon dioxide absorption device provided on the top plate is formed to act as a counterweight. It is in.

Further, the present invention is connected to a mouthpiece unit, an inspiratory flow path of the mouthpiece unit, and an expiratory flow path of the mouthpiece unit, and further connected to a breathing bag having an exhaust valve and a breathing bag. In a semi-closed breathing apparatus including a pressurized breathing gas tank and a carbon dioxide absorption device, a breathing bag includes a lower support plate and an intermediate plate, and a breathing gas is surrounded by a bellows between the lower support plate and the intermediate plate. It is formed by providing a breathing gas supply passage connected to the supply control valve, and the auxiliary breathing bag is provided with the intermediate plate and the top plate, and is surrounded by a bellows between the intermediate plate and the top plate for main respiration. A pressurized breathing gas supply pipe connected to a breathing gas supply control valve is formed at a position adjacent to each other with the bag and the intermediate plate interposed therebetween, and the lower support plate is a mouthpiece. The intake line and expiratory flow path from the breathing chamber knit, with an opening and the opening for exhalation air intake connecting respectively correspondingly provided with a drain outlet,
The intermediate plate has an opening for inhalation and an opening for exhalation, and the top plate has a protrusion formed toward the intermediate plate and a carbon dioxide absorption device is attached to the intermediate plate. In the inside, the intake opening of the lower support plate and the intake opening of the intermediate plate are enclosed and enclosed by a bellows to form a flow path for intake, and in the breathing bag, the intermediate passage is formed. A tubular bellows whose end plate is fixed to the plate and which is provided toward the drainage port of the lower support plate, has an open end of the tubular bellows and a drainage port of the lower support plate when the breathing bag is inflated. The auxiliary breathing bag is provided with a length that forms a narrow gap around the water collecting chamber, the water collecting chamber is formed below the drain port, and has a drain outlet having a check valve at the bottom thereof. In the inside, the flow path for exhalation is carbon dioxide gas. It is formed by sealingly enclosing the gas inlet of the collecting device and the expiratory opening of the intermediate plate with a bellows.The breathing gas supply control valve provided in the auxiliary breathing bag is a compression valve for compressing the auxiliary breathing bag. When
The control valve is provided with a control arm having a length capable of contacting the protrusion of the top plate, and the control valve performs an opening operation of the control valve for respiratory gas supply when contacting the protrusion of the top plate. Yes, the carbon dioxide absorption device provided on the top plate,
The breathing chamber of the mouthpiece unit is formed so as to act as a counterweight, and the breathing chamber of the mouthpiece unit is connected to the inhalation opening and the inhalation opening of the lower support plate of the breathing bag, respectively. A breathing gas inlet having a demand lever and a demand lever is provided in the vicinity of the breathing gas outlet, and an exhaust / drainage port having a check valve is formed at the bottom of the breathing chamber. The valve for controlling the opening and closing of the expiratory flow outlet has a valve rod extending to the expiratory flow outlet across the breathing chamber, and the tip end of the valve rod is capable of liquid-tightly contacting the expiratory flow outlet. A semi-closed breathing apparatus having a valve body, and a protrusion having a shape capable of contacting the demand lever is formed in an intermediate portion of a valve rod.

The semi-closed breathing apparatus of the present invention is used by being carried on the back of the user or attached to the chest of the user. In the semi-closed breathing apparatus of the present invention, the carbon dioxide absorbing device is attached to the side of the breathing bag that expands and contracts.
Therefore, when the user uses the semi-closed breathing apparatus while carrying it on his / her back, when he / she is in a supine position,
The carbon dioxide absorption device of the semi-closed breathing apparatus is lower than the position of the lungs of the user, and the ambient pressure at the position of the breathing bag is slightly higher than the internal pressure of the lungs, so that the breathing bag is compressed. However, since the weight of the carbon dioxide absorption device acts to inflate the breathing bag, the internal pressure can be maintained at the same level as the internal pressure of the lungs. Further, when the user takes a prone posture, the position of the lungs of the user is lower than that of the breathing bag, and the internal pressure of the lung is larger than the ambient pressure where the breathing bag is located, so the breathing bag is inflated. However, since it is compressed by the weight of the carbon dioxide absorption device, the internal pressure can be maintained at the same level as the internal pressure of the lungs. Therefore, for example, the diver can perform the same breathing action regardless of the posture in the water.

As described above, according to the present invention, the weight of the carbon dioxide gas absorbing device resists the ambient pressure acting to inflate or compress the breathing bag, and the breathing bag and the auxiliary breathing bag are made of carbon dioxide. Due to the weight of the gas absorber, the internal pressure will be maintained at the same level as the internal pressure of the lungs.

In the present invention, the breathing bag is provided so as to be adjacent to the auxiliary breathing bag provided with the carbon dioxide gas absorbing device via the intermediate plate, and both of which are stretchably surrounded by the bellows. In the present invention, the breathing bag constantly supplements the breathing gas, dilutes the carbon dioxide gas in the exhaled breath, and improves the usage efficiency of the carbon dioxide gas absorbing device. In order to mix the exhaled air from the unit and send it to the carbon dioxide absorbent, an opening for the exhaled air mixed gas in which the breathing gas and the exhaled air are mixed is formed in the intermediate plate, and the lower support plate is provided in the breathing bag chamber An opening for introducing the exhaled breath and an opening for introducing the breathing gas are formed. Therefore, in the present invention, in the breathing bag, the inspiratory flow path that is expandable and contractible is formed surrounded by the bellows so that the inspiratory air does not mix with the mixed gas of the respiratory gas.

In the present invention, the auxiliary breathing bag is formed so as to be able to supply the breathing gas when the amount of the breathing gas flowing in the inspiratory flow passage is remarkably reduced, and absorbs carbon dioxide gas in the breathing gas. A carbon dioxide absorption device is provided on the top plate in order to remove it and send it out as intake air. Therefore, in the auxiliary breathing bag, connect the opening for exhaled air mixed gas of the intermediate plate and the gas inlet of the carbon dioxide gas absorption device to the bellows so that the inhaled air that has absorbed and removed carbon dioxide and the exhaled air mixed gas do not mix. An expiratory mixed gas flow path that is surrounded and expandable is formed.

In the present invention, the carbon dioxide absorption device means a carbon dioxide absorption device and a carbon dioxide adsorption device. Therefore, the carbon dioxide absorbent means a substance that absorbs carbon dioxide and a substance that adsorbs carbon dioxide.

In the present invention, when the auxiliary breathing bag is compressed to reduce the volume of the auxiliary breathing bag and the amount of the breathing gas decreases, the breathing gas is supplemented and the volume of the auxiliary breathing bag is increased, In order to make it easier for the user to breathe, the auxiliary breathing bag has a projection formed on the top plate, and a breathing gas supply pipe connected to the high-pressure breathing gas flow path through a breathing gas control valve equipped with an opening / closing arm. The road is inserted. Therefore, according to the present invention, when the auxiliary breathing bag is compressed by water pressure or the like and the volume of the auxiliary breathing bag is reduced, the opening / closing arm comes into contact with and is pushed by the protrusion, so that the control valve for the breathing gas is When opened, breathing gas is supplied into the auxiliary breathing bag to supplement the breathing gas and increase the volume of the auxiliary breathing bag.

In the present invention, in order to prevent water vapor and water that enter the breathing bag from entering the carbon dioxide gas absorbing device, the gas inlet and the gas outlet of the carbon dioxide absorbing device are
It is preferable that it is provided so as to project inward from the top plate, and that a dam plate is provided in the intermediate plate so as to surround the openings for the exhaled gas mixture and the inhaled gas. In addition, the end plate is fixed to the intermediate plate, the bellows is provided to extend upward to the water discharge port, and the water collected in the water collecting chamber is discharged from the discharge port equipped with the check valve by the pump action due to the expansion and contraction of the bellows. Can be discharged outside the breathing bag.

Further, in the present invention, the breathing passage of the mouthpiece unit is connected with the expiratory flow passage and the inspiratory flow passage which are connected to the breathing bag, and the expiratory opening to which the expiratory flow passage is connected is
A check valve, which is a non-return valve that allows exhaled air to flow back into the exhalation flow path, is provided.The intake port connected to the inhalation flow path allows inhalation to flow into the inspiration flow path and shuts off inflow of exhalation air. The intake valve is provided so that the intake air can be smoothly introduced into the mouthpiece unit and the exhalation air can be smoothly discharged from the mouthpiece unit.

In the present invention, the breathing chamber of the mouthpiece unit is provided with an exhaust port / drainage port equipped with a drainage mechanism so that water vapor and / or water flowing in at the time of breathing can be discharged. In the present invention, the water vapor and / or water flowing in at the time of respiration mainly adheres and accumulates on the side of the mouthpiece unit opposite to the side of the mouthpiece where the mouthpiece is located. In order to avoid the entry into the flow path as much as possible, the breathing chamber of the mouthpiece unit is provided with an exhaust port / drain port equipped with a check valve at a place where water vapor and / or water is collected. The check valve of the exhaust port / drain port can be opened by increasing the pressure in the breathing chamber, which allows drainage of the mouthpiece unit in the breathing chamber.

In the present invention, in order to increase the pressure in the breathing chamber of the mouthpiece unit, for example, a pressurized breathing gas adjusted to a predetermined pressure from a pressurized breathing gas tank can be fed into the breathing chamber. The breathing gas supply flow path from the breathing gas tank is connected to the breathing gas supply port of the breathing chamber. Since the exhalation valve is configured to open when the pressure of the breathing chamber of the mouthpiece unit is increased, in the present invention, when the pressure of the breathing chamber is increased by the breathing gas from the breathing gas supply channel. In addition, an exhalation port opening / closing valve for opening / closing the exhalation port is provided separately from the exhalation valve so that the exhalation valve does not open.

Therefore, in the present invention, in order to open the breathing gas supply flow path connecting port simultaneously with the closing of the breathing port by the breathing port opening / closing valve, the breathing gas is opened / closed by the opening / closing operation of the breathing port opening / closing valve. A protrusion is formed on the valve rod of the expiratory opening / closing valve so that the opening / closing valve of the supply passage connection port can be opened / closed. A demand lever is provided in the opening / closing valve of the respiratory gas supply passage connecting port so that the opening / closing valve of the respiratory gas supply passage connecting port can be opened / closed by the reciprocating movement of the valve rod. The demand lever is formed, for example, in an L-shape with a substantially acute angle, and the bent portion of the L-shape is rotatably attached to the mouthpiece unit wall by a shaft. When the valve rod operates so as to close the expiratory opening / closing valve, the lever portion of the demand lever is pushed in contact with the protrusion formed on the valve rod, and the valve element of the opening / closing valve of the connection port is It is moved in a direction away from the connection port.

[0024]

According to the present invention, a breathing bag and an auxiliary breathing bag are provided, and an inspiratory flow path is formed by a bellows in the breathing bag, a breathing gas introduction path is inserted, and a bellows bag is formed as a pump for performing suction and discharge actions. And a water collection chamber below it,
On the other hand, in the auxiliary breathing bag, an exhalation flow path is formed by a bellows, and a carbon dioxide absorbing device also serving as a counterweight is provided on the top plate of the auxiliary breathing bag to contact the protrusions provided on the top plate to absorb the breathing gas. Since the breathing gas to be supplied and the supply passage are inserted, the breathing gas is mixed with the exhaled breath, diluting the carbon dioxide concentration of the exhaled breath, preventing a rapid decrease in the capacity of the carbon dioxide absorption device, and pumping the bellows bag. As a result, water is positively pushed out of the breathing bag, so that it is possible to prevent a decrease in the capacity of the carbon dioxide absorption device, and it is possible to use the carbon dioxide absorption device for a relatively long time.

Further, according to the present invention, since the carbon dioxide absorbing device is also used as the counterweight, when the breathing apparatus is used while being carried on the back, the carbon dioxide absorbing apparatus functions as the counterweight even if the user takes a supine posture during use. Therefore, it is possible to suppress the compression of the breathing bag due to the ambient pressure, it does not affect the pressure, and even when the prone posture is taken, the carbon dioxide absorbing device acts to compress the breathing bag, The pressure does not drop significantly. Therefore, according to the present invention, even if there is a change in posture such as a supine posture or a prone posture, breathing does not become difficult.

Further, in the present invention, an exhaust port / drain port having a check valve is formed on the surface of the breathing chamber of the mouthpiece unit opposite to the mouthpiece, and the breathing gas introducing port is provided in the vicinity of the exhalation airflow outlet of the breathing chamber. Is formed, and the opening / closing valve of the breathing gas inlet is controlled by the protrusion provided on the valve rod of the opening / closing valve of the exhalation airflow outlet, so that the water vapor in the exhaled breath exhaled to the mouthpiece unit and the breathing operation Water that enters the mouthpiece is operated by operating the valve rod of the on-off valve at the exhalation air flow outlet to open the breathing gas inlet and increasing the pressure inside the breathing chamber of the mouthpiece unit. The valve can be opened to force steam and water out of the mouthpiece unit.

Therefore, according to the present invention, water vapor and water existing in the breathing chamber of the mouthpiece unit can be removed by operating the valve rod of the on-off valve at the exhalation airflow outlet at an appropriate interval. It is possible to reduce the amount of water vapor and water contained in the inspiratory air sent to the breathing bag and the auxiliary breathing bag from the air bag, and to prevent the absorption capacity of the carbon dioxide absorption device by the water vapor and water.

[0028]

Embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited by the following description and examples. FIG. 1 is a cross-sectional view for explaining the outline of one embodiment of the present invention, and FIG. 2 is an enlarged partial cross-sectional view showing the outline of the breathing bag and the auxiliary breathing bag of the embodiment of FIG. FIG. 4 and FIG. 4 are partially enlarged cross-sectional views schematically showing different operation modes of the mouthpiece unit in the embodiment shown in FIG. 1, respectively. FIG. 5 is a schematic sectional view showing an embodiment of the present invention, which is different from the embodiment shown in FIG.

In the example shown in FIG. 1, the breathing apparatus 1
Is configured to be worn on the back and chest of a diver, and includes a breathing gas tank 2, an airbag 3, an auxiliary airbag 4, and a mouthpiece unit 5. In this example, the breathing gas tank 2, the air bag 3, and the auxiliary air bag 4 are installed in a casing formed of a mounting substrate 6 and a cover 7 covering the substrate 6.

In this example, the airbag 3 and the auxiliary airbag 4 are formed adjacent to each other with the intermediate support plate 8 interposed therebetween. The air bag 3 is formed by surrounding a bottom plate 9 and a support plate 8 located above the bottom plate 9 with a first bellows 10. The auxiliary air bag 4 includes an intermediate support plate 8 and the intermediate support plate 8. 8 is formed by surrounding a top plate 11 located above 8 with a second bellows 12. In this example, the top plate 11
Is provided with a carbon dioxide absorption device 13 that also serves as a counterweight.

In this example, the breathing gas tank 2 is a breathing gas cylinder of oxygen, compressed air or the like, and is detachably attached to the mounting substrate 6. The breathing gas pipe 14 connected to the breathing gas cylinder 2 is connected to a decompressor 15 in which a plurality of passages are branched, and the first passage 16 of the decompressor 15 is composed of, for example, a flexible pipe, It is connected to the device 17.

In the present example, the metering device 17 includes a pressure gauge 18 and a depth gauge 19 so that the diver can see it at any time.
A metering device with is used. However, the depth gauge may include a depth alarm device that issues an alarm when the depth becomes too deep. In this example, any weighing device can be used as long as it is a weighing device provided with a pressure gauge and a depth gauge. In this example, a conventionally known weighing device is used.

The second flow path 20 of the decompressor 15 is connected to the air bag 3 via a filter 21, a flow control valve 22 for adjusting the flow rate of the breathing gas, and a breathing gas supply nozzle 24 connected by a pipe joint 23. Connected. In this example, the breathing gas supply nozzle 24 prevents the water accumulated in the airbag 3 from entering the breathing gas supply nozzle 24.
It is preferably formed so as to project into the airbag 3. The third flow path 25 of the decompressor 15 includes the auxiliary airbag 4
To the flow control valve via a projection valve 26. The protrusion valve 26 is provided with a control arm 28 that opens and closes the protrusion valve 26 by contacting a protrusion 27 provided on the top plate 11 downward. Channel 2
Reference numeral 9 denotes a breathing gas supply pipe for the mouthpiece unit 5, which is connected to the breathing chamber 30 of the mouthpiece unit 5.

As shown in detail in FIG. 2, in this example, the airbag 3 is provided with an intake outlet 31 and an expiratory inlet 32 on the bottom plate 9, and further the bottom portion of the recessed portion 33 of the bottom plate 9. A drain outlet 34 is formed in the. A bellows pump 35 having an upper end fixed to an end plate and sealed is provided above the drain outlet 34 of the recess 33. The lower end of the bellows pump 35 is fixed to the bottom plate 9 of the recess 33 at an appropriate position. Below the bellows pump 35, an annular upper plate member 36 and an annular lower plate member 37 made of rubber are provided. In this example, the upper plate member 36 and the lower plate member 37 made of rubber form a check valve ripple valve.

In the present embodiment, the bellows pump 35 has its upper end fixed to the intermediate support plate 8 of the air bag 3 and its lower end fixed to the bottom plate 9 of the recessed portion 33. Contracts with the contraction of, and expands with the expansion of the breathing bag when exhaling. Bellows pump 35
The rubber annular plate members 36 and 37 at the lower end of the bellows pump 35 form a gap between the annular plate members 36 and 37 at the time of expansion of the bellows pump 35 so as to absorb the water accumulated in the recessed portion 33, At the time of contraction, the annular plate members 36 and 37 are in close contact with each other to close the space between the annular plate members 36 and 37, and the water is discharged from the drain outlet 34 to the water collecting chamber 38 formed below the recessed portion 33. Let it flow out. A water outlet 41 having a check valve 40 is formed in the bottom portion 39 of the water collection chamber 38, and the check valve 40 opens due to the pressure when the bellows pump expands, so that the water in the water collection chamber 39 is removed. It is discharged to the outside.

In this example, a tubular bellows 43 is provided between the intake outlet 31 of the bottom plate 9 and the intake outlet 42 formed in the intermediate support plate 8 so that the intake air and the expiration air do not mix in the airbag 3. Sealed connection. A weir 44 is formed around the intake outlet 42 of the intermediate support plate 8 so that water accumulated in the auxiliary airbag does not enter the tubular bellows 43 for exhalation. An exhalation inlet hole 45 is formed in the intermediate support plate 8, and the exhalation inlet hole 45 and the gas inlet 46 of the carbon dioxide gas absorbing device 13 are hermetically connected by a tubular bellows 47.

In the present embodiment, for example, when the user takes a prone posture, the carbon dioxide absorption device 13 is provided with an airbag 3.
A weir 48 is formed around the exhalation inlet hole 45 of the intermediate support plate 8 on the side of the airbag 3 so as to protrude into the airbag 3 so that water in the inside does not enter. The gas outlet side 49 of 13 is formed so as to protrude inward from the inner surface of the top plate 11. Therefore, the exhaled gas that has entered the gas inlet 46 of the carbon dioxide gas absorption device 13 is absorbed from the carbon dioxide gas inlet flow path by the absorption chamber 5 provided around it.
0 and out of the gas outlet 49.

As shown in detail in FIGS. 3 and 4, the breathing chamber 30 of the mouthpiece unit 5 includes a check valve 5
1 is provided with an exhalation outlet 52, and a check valve 53 is provided with an intake inlet 54. The exhalation outlet 5
2 is the exhalation inlet hole 3 of the airbag 3 via the exhalation tube 55.
2, the intake inlet 54 of the mouthpiece unit 5
Is connected to the intake outlet 31 of the airbag 3 via an intake pipe 56.

In this example, the mouthpiece unit 5 has a breathing chamber 30 on the side of the exhalation outlet 52, which has the mouthpiece 5 attached thereto.
7 is provided, and an exhaust port / drain port 58 is provided on the intake inlet 54 side.
Is provided. A check valve 60, which is biased by a spring 59, is attached to the exhaust port / drain port 58. The check valve 60 is formed by forming a valve seat 62 on the outside of a flange 61 protruding inside the drainage port / drainage port 58 and mounting a spring 59 on the inside of the flange 61.

In the present example, the opening of the exhaust port / drain port 58 in the breathing chamber 30 opens the breathing gas supply pipe 29,
This is done by increasing the pressure in the breathing chamber 30. However, the purge button 64 is moved outward by the compression spring 63 so that the breathing gas outlet 52 is closed when the breathing gas supply pipe 29 is opened so that the breathing gas does not flow out from the breathing gas outlet 52. Exhalation outlet opening / closing valve 65 being energized
However, the valve stem 66 penetrates the breathing chamber 30 and
It is provided for. A protrusion 67 is provided on the valve rod 66 of the expiratory outlet opening / closing valve 65. This protrusion 67
Is formed so as to be able to come into contact with the lever portion 69 of the demand lever 68 when the valve rod 66 projects toward the breathing chamber 30.

The opening 70 of the breathing gas supply pipe 29 is opened and closed by a breathing gas on-off valve 71 which is connected to a demand lever 68 and is urged by a spring (not shown).
Done by. When the purge button 64 of the expiratory outlet opening / closing valve 65 is pressed to project the valve rod 66 of the opening / closing valve 65 toward the inside of the breathing chamber 30 so as to close the expiratory outlet portion 52, the protrusion 67 of the valve rod 66 becomes The lever portion 69 of the demand lever 68 is pushed to rotate the demand lever 68 counterclockwise, and the breathing gas on-off valve 71 is separated from the opening 70 of the breathing gas supply pipe 29 so that the breathing gas enters the breathing chamber 30. Drain. Purge button 6 of the exhalation outlet opening / closing valve 65
When the hand is released from 4, the valve rod is separated from the exhalation outlet 52 by the action of the compression spring 63, and the projection 67 is moved to the demand lever 6
8, the respiratory gas supply pipe 29 is closed by the action of the demand lever 69.

Since this example is constructed as described above,
The diver attaches the casing 1 to the back side with a string or the like,
Next, the mouthpiece 57 of the mouthpiece unit 5 is held in the mouth to dive. Even if the prone posture is taken while breathing with the mouthpiece 57, the expansion of the airbag 3 and the auxiliary airbag 4 due to the weight of the user can be reduced by the compression action of the weight of the carbon dioxide absorbing device 13.
Even if the air bag 3 and the auxiliary air bag 4 are compressed due to the weight of the user and the water pressure due to the buoyancy even if the user is in the supine posture, the volume contraction due to the compression is suppressed by the carbon dioxide gas absorption device 13
Can be reduced by the expansion effect of the weight.

In this example, due to the respiratory action of the user,
Although the airbag 3 and the auxiliary airbag 4 contract and expand, a bellows pump 37 provided in the airbag 3
By the action of, the water that has entered the airbag 3 and the water from the water vapor in the exhaled air are sucked into the bellows pump 35 when the bellows pump 35 expands, and are discharged into the water collection chamber 33 when the bellows pump 35 contracts. The check valve 40 can be opened and the check valve 40 can be discharged to the outside of the water collection chamber 33.

The user cannot avoid invasion of water from around the mouthpiece 57 while holding the mouthpiece 57 in his mouth and breathing underwater, for example. The water that has entered the mouthpiece unit 5 accumulates in the breathing chamber 30 of the mouthpiece unit 5. Breathing room 30 like this
The water accumulated inside is pushed by pressing the purge button.
The breathing gas is introduced into the breathing chamber 30 from the breathing gas supply pipe 29, the pressure in the breathing chamber 30 is increased by the introduction of the breathing gas, and the water accumulated in the breathing chamber 30 is removed from the mouthpiece unit 5. Can be discharged to. Then, in this example, the auxiliary airbag 4 is compressed, and the airbag 3 is compressed.
When the breathing gas in the auxiliary airbag decreases, the protrusion 27 of the top plate 11 of the auxiliary airbag 4 is pushed by the opening / closing arm of the projection valve 26 to supply the high-pressure gas into the auxiliary airbag 4 to supply the breathing gas. It can be supplemented automatically.

When the user exhales, exhalation is sent from the exhalation outlet 52 of the mouthpiece unit 5 to the airbag 3 and the volume of the airbag 3 increases. Since the breathing gas is supplied from the nozzle 24, the concentration of carbon dioxide gas in the exhaled breath is diluted, the burden on the carbon dioxide gas absorption device is lightened, and the carbon dioxide gas can be absorbed. The gas is supplied to the carbon dioxide absorption device 13 by the pressure that the user inhales, and the air containing carbon dioxide in the airbag 3 and the auxiliary airbag 4 is absorbed by the breathing action of the user. It is passed through the device 13 to absorb carbon dioxide. Then, the carbon dioxide gas is removed in this way, and only the air is sent to the expiratory tube 56 and supplied to the breathing chamber 30 of the mouthpiece unit 5, and the user can inhale this air.

The case where the semi-closed breathing apparatus is attached to the back has been described above. However, even when the apparatus is attached to the chest, the posture of the user does not affect the pressure as in the case where the apparatus is attached to the back. .. Therefore, in this example, the airbag 3 and the auxiliary airbag 4 maintain the same internal pressure as that of the lungs in both the back wearing and the chest wearing.
The volume of can be made substantially constant. Therefore, the user can perform the same breathing action regardless of the posture in water.

In the example shown in FIG. 5, the same reference numerals as those in FIGS. 1 to 4 are used for the portions corresponding to the examples of FIGS. The example shown in FIG. 5 is an example in which a three-way valve is used as the decompressor 15 of the breathing apparatus 1, and the mouthpiece unit used has the same structure as the example of FIG. 1. The example in FIG.
The breathing gas supply pipe from the decompressor 15 is the auxiliary airbag 4
1 is different from the example of FIG. 1 in that the breathing gas is not directly connected to the breathing gas and that a T-shaped pipe joint is used as the pipe joint to connect the breathing gas to the flow path 29 and the nozzle 24. . Therefore, although the supply of the breathing gas to the auxiliary airbag is reduced, the size of the nozzle 24 and the size of the breathing gas supply pipe 29 branched from the nozzle 24, etc. are selected to an appropriate size so that the embodiment of FIG. The same operation as the example can be performed.

[0048]

According to the present invention, a breathing bag and an auxiliary breathing bag are provided, an inspiratory flow path is formed by a bellows in the breathing bag, a breathing gas introduction path is inserted, a bellows bag is formed, and water is provided below it. In the auxiliary breathing bag, on the other hand, in the auxiliary breathing bag, an expiratory flow path is formed by the belog, and on the top plate of the auxiliary breathing bag,
A carbon dioxide gas absorption device was also used as a counterweight, and the breathing gas and the supply path for supplying the breathing gas in contact with the protrusions provided on the top plate were inserted. The pressure and volume of gas can be automatically compensated for, the deterioration of the capacity of the carbon dioxide absorption device can be prevented, and the semi-closed breathing apparatus can be used for a relatively long time.

Further, in the present invention, since the carbon dioxide absorbing device also serves as the counterweight, the breathing can be carried out even when the posture changes such as the supine posture and the prone posture in use, as compared with the conventional semi-closed breathing apparatus. It won't be painful. Furthermore, in the present invention, a drain outlet having a check valve is formed on the opposite surface of the mouthpiece of the breathing chamber of the mouthpiece unit, and a breathing gas inlet is formed in the vicinity of the exhalation airflow outlet of the breathing chamber. Since the opening / closing valve of the breathing gas outlet is controlled by the protrusion provided with the valve rod of the opening / closing valve of the exhalation air flow outlet,
Compared with the conventional mouthpiece unit, it is possible to open the check valve at the drain port and push out steam and water to the outside of the mouthpiece unit by a simple operation such as button operation. Therefore, according to the present invention, the water vapor and water existing in the breathing chamber of the mouthpiece unit can be removed by operating the valve rod of the on-off valve of the expiratory air flow outlet at an appropriate interval, so that the conventional semi-closed breathing Compared to the device, the amount of water vapor and water contained in the inhalation sent from the mouthpiece unit to the breathing bag and the auxiliary breathing bag can be reduced, and the carbon dioxide absorption device using water vapor and water can be used for a long time. it can.

In the present invention, the carbon dioxide adsorbing device is installed at the position where the breathing bag is expanded and contracted so that the weight of the carbon dioxide absorbing device resists the expansion or contraction action of the ambient pressure on the breathing bag. Because of the weight of the carbon dioxide adsorption device, the internal pressure of the breathing bag can be maintained at an internal pressure that is similar to the internal pressure of the lungs, regardless of the posture of the user. It has the effect of being able to perform the respiratory action.

Further, according to the present invention, as described above, the breathing gas from the tank is introduced into the breathing chamber of the mouthpiece unit through the pipe, and the opening portion of the pipe is opened when the purge button is operated. Was introduced into the breathing chamber to make it pressurized, and the check valve at the drain port provided in the breathing chamber was opened to drain the water in the breathing chamber, so compared to the conventional semi-closed breathing apparatus, Drainage work can be performed very easily.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall outline of an embodiment of the present invention.

2 is an enlarged partial cross-sectional view schematically showing a breathing bag and an auxiliary breathing bag in the embodiment of FIG.

FIG. 3 is a partial cross-sectional view schematically showing one operation mode of the mouthpiece unit in the embodiment shown in FIG. 1 during normal use.

FIG. 4 is a partial cross-sectional view schematically showing one operation mode during drainage of the mouthpiece unit in the embodiment shown in FIG.

FIG. 5 is a cross-sectional view showing an overall outline of another embodiment different from the embodiment of the present invention shown in FIG.

[Explanation of symbols]

 1 breathing apparatus 2 breathing gas tank, breathing gas cylinder 3 airbag 4 auxiliary airbag 5 mouthpiece unit 6 mounting substrate 7 cover 8 intermediate support plate 9 bottom plate 10 first bellows 11 top plate 12 second bellows 13 carbonic acid Gas absorber 14 Kokyu gas 15 Pressure reducer 16 First flow path for pressure reducer 17 Metering device 18 Residual pressure gauge 19 Depth meter 20 Second flow path for pressure reducer 21 Filter 22 Flow control valve 23 Pipe joint 24 Breathing gas Supply nozzle 25 Third channel of decompressor 26 Projection valve 27 Protrusion 28 Control arm 29 Fourth channel of decompressor 30 Breath chamber of mouthpiece unit 31 Intake outlet 32 Expiratory inlet 33 Recessed portion 34 Drain outlet 35 Bellows pump 36 Upper annular plate member 37 Lower annular plate member 38 Water collecting chamber 39 Bottom part of water collecting chamber 40, 1, 53, 60 Check valve 41 Water outlet 42 Intake outlet 43, 47 Tubular bellows 44, 48 Weir 45 Exhalation inlet 46 Carbon dioxide absorber gas inlet 49 Carbon dioxide absorber gas outlet 50 Carbon dioxide absorption chamber 52 Mouse Expiration outlet of the breathing chamber of the peace unit 54 Inhalation inlet of the breathing chamber of the mouthpiece unit 55 Expiration pipe 56 Inhalation pipe 57 Mouthpiece 58 Exhaust / drainage port 59 Spring 61 Flange 62 Valve seat 63 Compression spring 64 Purge button 65 Expiration Outlet opening / closing valve 66 Valve rod 67 Expiration outlet opening / closing valve protrusion 68 Demand lever 69 Demand lever lever portion 70 Respiratory gas supply pipe opening 71 Respiratory gas on / off valve

[Procedure amendment]

[Submission date] May 10, 1993

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Delete

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title: Semi-closed breathing apparatus

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-closed breathing apparatus for underwater or land use, and more particularly to a semi-closed breathing apparatus for diving and fire fighting. Further, the present invention is for a water or land type of a type in which an intake gas from a compressed air cylinder or an oxygen cylinder is mixed with the user's exhaled gas, and carbon dioxide gas is absorbed from this mixed gas and returned to the user as an intake gas. Semi-closed breathing apparatus, especially for diving and fire fighting.

[0002]

2. Description of the Related Art Breathing devices for underwater or land use are roughly classified into an open breathing device, a semi-closed breathing device and a closed breathing device. The open-type breathing apparatus uses a compressed air cylinder as a respiratory gas source , for example, and expels all the exhaled air into water, etc. I have to
There was a problem that the weight increased.

On the other hand, the semi-closed breathing apparatus, for example, expiratory flow path for connecting the expiratory side of the mouthpiece, the breathing gas supply passage for connecting the call 吸Ga scan source, intake flow to be connected to the intake side of the mouthpiece An air bag or a breathing bag equipped with a passage and an exhaust valve, a carbon dioxide gas absorption device provided in the expiratory flow passage, and a breathing gas cylinder connected to the breathing gas supply flow passage to absorb and remove carbon dioxide gas from the breathing gas circulating in the breathing circuit. Then, a small amount of new breathing gas is mixed with the breathing gas that has absorbed and removed this carbon dioxide, and it is introduced into the breathing bag, and the excess breathing gas is discharged from the exhaust valve. Has the same structure as the semi-closed breathing apparatus, but is not provided with an exhaust valve so as to prevent excess breathing gas from being discharged to the outside.

[0004]

In such a closed-type breathing apparatus or semi-closed-type breathing apparatus, since the breathing bag is formed by a bellows or the like so as to be inflatable and compressible,
In the case where the breathing bag is attached to the back, for example, when the diver keeps the standing posture in the water, normal breathing is possible, but the water pressure on the breathing bag and the lungs of the diver are If there is a difference with the applied water pressure, the difference in water pressure acts to inflate or deflate the breathing bladder. Therefore, if the diver to keep the lying posture is different from the lungs pressure
When the force becomes low and the breathing bag inflates, and when the supine posture is maintained , the pressure becomes higher than that in the lungs, the breathing bag contracts, and the volume becomes smaller. Therefore, the diver should be standing up when he is in a prone position and when he is in a supine position.
The pressure on the lungs and breathing bag is different compared to the posture.
In both supine and prone positions
Also, will feel the suffocation, there is a problem.

Further, in the semi-closed diving breathing apparatus, the mouthpiece is eaten by inhaling the mouthpiece. However, since the mouthpiece circuit is at the same pressure as the external pressure at the time of inhaling, In general, water cannot be avoided from entering the mouthpiece unit. Then, when the water that has entered the mouthpiece enters the carbon dioxide absorption device from the mouthpiece unit, it reacts with the carbon dioxide absorbent to generate strong alkaline water or reduce the carbon dioxide absorption function. This is a problem.

Therefore, conventionally, in order to drain the water that has entered the mouthpiece unit, the water leakage prevention valve provided in the mouthpiece unit is manually operated and opened, and the water is discharged together with the exhalation. It is necessary to be proficient in handling the inundation prevention valve in this draining work, and
When handling the flood protection valve, when the mouthpiece comes off against the intention of the diver, the protection valve does not work, and there is a danger that water will enter the respiratory circuit via the expiratory tube. .

The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to mount a carbon dioxide gas absorbing device or a carbon dioxide absorbing device on the outside of a breathing bag and use it as a weight to lie down in a prone position. In the case of posture and the case of supine posture,
It is an object of the present invention to provide a semi-closed breathing apparatus, in particular, a semi-closed breathing apparatus for diving, in which the pressure fluctuation in the breathing bag is reduced so that the breathing action can be performed in substantially the same state.

Another object of the present invention is to supply a relatively high pressure breathing gas from a cylinder into the mouthpiece unit by a simple operation, and the water retained in the mouthpiece unit is removed by the pressure of the breathing gas. It is an object of the present invention to provide a semi-closed breathing apparatus for draining water, particularly a semi-closed breathing apparatus for diving and fire fighting.

Further, according to the present invention, the suction and discharge actions of the pump in the breathing bag forcefully sucks the water in the breathing bag into the pump and discharges the water into the water collecting chamber located below the pump. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-closed breathing apparatus for opening a check valve and forcibly discharging it to the outside of a water collection chamber, particularly a semi-closed breathing apparatus for diving and fire fighting.

[0010]

That is, the present invention relates to a breathing bag which is connected to a mouthpiece unit, an inspiratory flow path of the mouthpiece unit, and an expiratory flow path of the mouthpiece unit, and further includes an exhaust valve. A semi-closed breathing apparatus including a pressurized breathing gas tank connected to the breathing bag and a carbon dioxide gas absorption device, the breathing bag including a lower support plate and an intermediate plate, and a bellows between the lower support plate and the intermediate plate. The auxiliary breathing bag is provided with the intermediate plate and the top plate, and the bellows is provided between the intermediate plate and the top plate. surrounded by, in the relative call吸袋
A pressurizing breathing gas supply pipe connected to a control valve for breathing gas supply is inserted and formed adjacent to each other with an intervening plate in between, and the lower support plate is an exhalation air flow from a breathing chamber of the mouthpiece unit. In addition to having an opening for exhalation connected to the passage, a drainage port is provided, the intermediate plate is provided with an opening for exhalation, and the top plate has a protrusion formed toward the intermediate plate. , A carbon dioxide absorption device is attached, and in the breathing bag, a cylindrical bellows whose end plate is fixed to the intermediate plate and which is provided toward the drainage port of the lower support plate is provided when the breathing bag is inflated. The water collecting chamber is formed below the drain port, and has a length that forms a narrow gap around the open end of the cylindrical bellows and the drain port of the lower support plate. Equipped with a drain outlet with a check valve , In the assisted breathing bag, a flow path for the exhaled air, is formed by sealing enclosure by bellows between the front Symbol opening for exhaled gas inlet and the intermediate plate of carbon dioxide absorber, The breathing gas supply control valve provided in the auxiliary breathing bag includes a control arm having a length capable of contacting the protrusion of the top plate when the auxiliary breathing bag is compressed, and the control valve is , The opening operation of the breathing gas supply control valve is performed when it comes into contact with the protruding portion of the top plate, and the carbon dioxide absorption device provided on the top plate is formed so as to act as a counterweight. It is in a semi-closed breathing apparatus characterized by being.

The present invention also includes a mouthpiece unit,
A breathing bag connected to the inspiratory flow passage of the mouthpiece unit and connected to the expiratory flow passage of the mouthpiece unit, and further provided with a breathing bag, a pressurized breathing gas tank connected to the breathing bag, and a carbon dioxide absorbing device In the semi-closed breathing apparatus, the breathing bag includes a lower support plate and an intermediate plate, and is surrounded by a bellows between the lower support plate and the intermediate plate,
The breathing gas supply hole connected to the breathing gas supply control valve is provided, and the auxiliary breathing bag includes the intermediate plate and the top plate, and the intermediate plate and the top plate are surrounded by a bellows. , to call吸袋next to between the intermediate plate
Fit, is formed and pressurized breathing gas supply pipe which connects to the breathing gas supply control valve is inserted, the lower support plate, the intake passage and expiratory flow path from the breathing chamber of the mouthpiece unit, With an opening for inhalation and an opening for exhalation that are respectively connected correspondingly, a drain outlet is provided, the intermediate plate is provided with an opening for inhalation and an opening for exhalation, the top plate, A projecting portion is formed toward the intermediate plate, and a carbon dioxide absorbing device is attached to the intermediate plate. , A flow path for inhalation is formed by being enclosed and enclosed by a bellows, and in the breathing bag, a cylindrical bellows having an end plate fixed to the intermediate plate and provided toward the drainage port of the lower support plate is , When the breathing bag is inflated, It is provided with a length that forms a narrow gap around the open end of the cylindrical bellows and the drain of the lower support plate, and a water collecting chamber is formed below the drain, and at the bottom thereof. equipped with a drainage outlet with a check valve, in the assisted breathing bag, a flow path for the exhaled breath, bellows and an opening of the front Symbol for exhaled gas inlet and the intermediate plate of carbon dioxide absorber The control valve for breathing gas supply provided in the auxiliary breathing bag has a length such that it can contact the protrusion of the top plate when the auxiliary breathing bag is compressed. And a control arm for opening the breathing gas supply control valve when the control valve comes into contact with the protrusion of the top plate, and the carbon dioxide absorption device provided on the top plate is , To act as a counterweight In semi-closed breathing apparatus, characterized by being made.

Further, the present invention is connected to a mouthpiece unit, an inspiratory flow path of the mouthpiece unit, and an expiratory flow path of the mouthpiece unit, and further connected to a breathing bag having an exhaust valve and a breathing bag. In a semi-closed breathing apparatus including a pressurized breathing gas tank and a carbon dioxide absorption device, a breathing bag includes a lower support plate and an intermediate plate, and a breathing gas is surrounded by a bellows between the lower support plate and the intermediate plate. It is formed by providing a breathing gas supply hole passage that connects the supply control valve, the auxiliary breathing bag is provided with the intermediate plate and the top plate, the intermediate plate and top plates surrounded by the bellows, respiration With the intermediate plate in between
Pressurized breathing gas supply pipes that are adjacent to each other and connected to a breathing gas supply control valve are inserted and formed, and the lower support plate is provided in an inspiratory flow passage and an expiratory flow passage from the breathing chamber of the mouthpiece unit. In addition to having an inhalation opening and an exhalation opening that are connected to each other, a drain outlet is provided,
The intermediate plate is provided with an opening for inhalation and an opening for exhalation, and the top plate is formed with a protruding portion toward the intermediate plate, and a carbon dioxide absorbing device is attached to the top plate. In the inside, the intake opening of the lower support plate and the intake opening of the intermediate plate are enclosed and enclosed by a bellows to form a flow path for intake, and in the breathing bag, the intermediate passage is formed. A tubular bellows whose end plate is fixed to the plate and which is provided toward the drainage port of the lower support plate, has an open end of the tubular bellows and a drainage port of the lower support plate when the breathing bag is inflated. The auxiliary breathing bag is provided with a length that forms a narrow gap around the water collecting chamber, the water collecting chamber is formed below the drain port, and has a drain outlet having a check valve at the bottom thereof. in the inner flow path for the exhaled breath, before SL carbon dioxide gas It is formed by sealingly enclosing the gas inlet of the absorber and the expiratory opening of the intermediate plate with a bellows. When
The control valve is provided with a control arm having a length capable of contacting the protrusion of the top plate, and the control valve performs an opening operation of the control valve for respiratory gas supply when contacting the protrusion of the top plate. Yes, the carbon dioxide absorption device provided on the top plate,
The breathing chamber of the mouthpiece unit is formed to act as a counterweight, and the breathing chamber of the mouthpiece unit is connected to the inhalation opening and the exhalation opening of the lower support plate of the breathing bag, respectively. A breathing gas inlet having a demand lever and a demand lever is provided in the vicinity of the breathing gas outlet, and an exhaust / drainage port having a check valve is formed at the bottom of the breathing chamber. The valve for controlling the opening and closing of the expiratory flow outlet has a valve rod that extends to the expiratory flow outlet across the breathing chamber, and the tip of the valve rod can be in liquid-tight contact with the expiratory flow outlet. A semi-closed breathing apparatus having a valve body, and a protrusion having a shape capable of contacting the demand lever is formed in an intermediate portion of a valve rod.

The semi-closed breathing apparatus of the present invention is used while being carried on the back of the user. In the semi-closed breathing apparatus of the present invention, the carbon dioxide absorbing device is attached to the side of the breathing bag that expands and contracts. Therefore, when the user uses the semi-closed breathing apparatus while carrying it on his / her back, the carbon dioxide absorption device of the semi-closed breathing apparatus becomes lower than the position of the lungs of the user when taking a supine posture. The ambient pressure at the location of the bladder is slightly higher than the internal pressure of the lungs, thus compressing the breathing bag, but the weight of the carbon dioxide absorber acts to inflate the breathing bag, so The internal pressure can be maintained at the same level as the internal pressure. Further, when the user takes a lying posture, becomes the position of the user's lungs is lower than the breathing bag, the internal pressure of the lung size no longer than around pressure to the position of the call 吸袋, breathing bag you expansion However, since the breathing bag is compressed by the weight of the carbon dioxide absorption device, the internal pressure can be maintained at the same level as the internal pressure of the lungs. Therefore, for example, the diver can perform the same breathing action regardless of the posture in the water.

As described above, according to the present invention, the weight of the carbon dioxide gas absorbing device resists the ambient pressure acting to inflate or compress the breathing bag, and the breathing bag and the auxiliary breathing bag are made of carbon dioxide. Due to the weight of the gas absorber, the internal pressure is about the same as the internal pressure of the lungs, and is approximately equal to the pressure and volume in the standing position.
Will be maintained.

In the present invention, the breathing bag is provided so as to be adjacent to the auxiliary breathing bag provided with the carbon dioxide gas absorbing device via the intermediate plate, and both of which are stretchably surrounded by the bellows. In the present invention, the breathing bag, at all times, cormorants complement the breathing gas
The eyes, the respiratory gas from the high pressure breathing gas tank, mixed exhalation from the mouthpiece unit, to send the carbon dioxide absorber, the intermediate plate, mixed expiratory mixed opening for gas of the breathing gas and exhalation Is formed, and the lower support plate is formed with an opening for introducing exhalation and an opening for introducing respiratory gas, which are respectively opened in the breathing bag chamber. Therefore, in the present invention, an expandable and inspirable flow path is formed in the breathing bag so that the inspiratory air does not mix with the expired gas mixture and is surrounded by the bellows.

In the present invention, the auxiliary breathing bag is carbon dioxide gas.
Is extremely inappropriate amount of breathing gas which flows into the intake passage from the absorber
When feet are formed so as to supply a high-pressure breathing gas, also the carbon dioxide gas in the respiratory gas absorbs removed, in order to feed the inlet, the carbon dioxide-absorbing device is provided on the top plate . Therefore, in the auxiliary breathing bag,
The expiratory mixture gas is expandable by being surrounded by a bellows by connecting the exhalation mixture gas opening of the intermediate plate and the gas inlet of the carbon dioxide absorption device so that the inhalation that has absorbed and removed carbon dioxide gas and the exhalation mixture gas do not mix. A flow path is formed.

In the present invention, the carbon dioxide gas absorption device means a carbon dioxide gas absorption device and a carbon dioxide gas adsorption device, and the carbon dioxide gas absorbent means a substance absorbing carbon dioxide gas and a substance absorbing carbon dioxide gas. In the present invention, carbon dioxide absorption
The device absorbs or adsorbs carbon dioxide contained in exhaled breath.
Is to be removed and is not filled with carbon dioxide absorbent.
It

In the present invention, when the auxiliary breathing bag is compressed to reduce the volume of the auxiliary breathing bag and the amount of the breathing gas decreases, the breathing gas is supplemented and the volume of the auxiliary breathing bag is increased, In order to make it easier for the user to breathe, the auxiliary breathing bag has a projection formed on the top plate, and a breathing gas supply pipe connected to the high-pressure breathing gas flow path through a breathing gas control valve equipped with an opening / closing arm. The road is inserted. Therefore, according to the present invention, when the auxiliary breathing bag is compressed by water pressure or the like and the volume of the auxiliary breathing bag is reduced, the opening / closing arm comes into contact with and is pushed by the protrusion, so that the control valve for the breathing gas is High pressure breathing gas is supplied into the auxiliary breathing bag to open and supplement the breathing gas and increase the volume of the auxiliary breathing bag.

In the present invention, in order to prevent water vapor and water that enter the breathing bag from entering the carbon dioxide gas absorbing device, the gas inlet and the gas outlet of the carbon dioxide absorbing device are
In addition to being provided so as to project inwardly from the top plate, it is preferable that the intermediate plate is provided with a weir plate surrounding the openings for exhaled gas mixture, that is, for exhaled gas and for inhaled gas, that is, for inhaled gas. Further, the end plate is fixed to the intermediate plate, the bellows <br/>'s that Ru extending upward side of the water outlet from the end plate is provided, the pumping action due to the expansion and contraction of the bellows, collected in the water collecting chamber water Can be discharged to the outside of the breathing bag through the discharge port provided with the check valve.

Further, in the present invention, the breathing passage of the mouthpiece unit is connected with the expiratory flow passage and the inspiratory flow passage which are connected to the breathing bag, and the expiratory opening to which the expiratory flow passage is connected is
A check valve, which is a non-return valve that allows exhaled air to flow back into the exhalation flow path, is provided.The intake port connected to the inhalation flow path allows inhalation to flow into the inspiration flow path and shuts off inflow of exhalation air. The intake valve is provided so that the intake air can be smoothly introduced into the mouthpiece unit and the exhalation air can be smoothly discharged from the mouthpiece unit.

In the present invention, the breathing chamber of the mouthpiece unit is provided with an exhaust port / drainage port equipped with a drainage mechanism so that water vapor and / or water flowing in at the time of breathing can be discharged. In the present invention, the water vapor and / or water flowing in at the time of respiration mainly adheres and accumulates on the side of the mouthpiece unit opposite to the side of the mouthpiece where the mouthpiece is located. In order to avoid the entry into the flow path as much as possible, the breathing chamber of the mouthpiece unit is provided with an exhaust port / drain port equipped with a check valve at a place where water vapor and / or water is collected. The check valve of the exhaust port / drain port can be opened by increasing the pressure in the breathing chamber, whereby drainage of the mouthpiece unit in the breathing chamber can be performed.

In the present invention, in order to increase the pressure in the breathing chamber of the mouthpiece unit, for example, a pressurized breathing gas adjusted to a predetermined pressure from a pressurized breathing gas tank can be fed into the breathing chamber. The breathing gas supply flow path from the breathing gas tank is connected to the breathing gas supply port of the breathing chamber. Exhalation valve, which is configured to open when the pressure in the breathing chamber of the mouthpiece unit is increased, in the present invention, the pressure in the breathing chamber is increased by the breathing gas from the breathing gas supply flow path Sometimes, an exhalation-port opening / closing valve that opens and closes the exhalation-port is provided separately from the exhalation-valve so that the exhalation-valve does not open.

[0023] Accordingly, in the present invention, the opening of the connection port of the breathing gas supply channel, in order to carry out simultaneously with the closing of the exhalation port by the exhalation opening and closing valve, the opening and closing of the exhalation opening and closing valve, the respiratory A protrusion is formed on the valve rod of the expiratory opening / closing valve so that the opening / closing valve of the gas supply channel connecting port can be opened / closed. Opening and closing of the breathing gas supply passage connecting port of the on-off valve is to allow the reciprocating movement of the valve stem, wherein the breathing gas supply passage connecting port of the on-off valve, the demand lever is provided. The demand lever is formed, for example, in an L-shape with a substantially acute angle, and the bent portion of the L-shape is rotatably attached to the mouthpiece unit wall by a shaft. When the valve rod operates so as to close the expiratory opening / closing valve, the lever portion of the demand lever is pushed in contact with the protrusion formed on the valve rod, and the valve element of the opening / closing valve of the connection port is It is moved in a direction away from the connection port.

[0024]

According to the present invention, a breathing bag and an auxiliary breathing bag are provided, and an inspiratory flow path is formed by a bellows in the breathing bag, a breathing gas introduction path is inserted, and a bellows bag is formed as a pump for performing suction and discharge actions. And a water collection chamber below it,
On the other hand, in the auxiliary breathing bag, an exhalation flow path is formed by a bellows, and a carbon dioxide absorbing device also serving as a counterweight is provided on the top plate of the auxiliary breathing bag to contact the protrusions provided on the top plate to absorb the breathing gas. Since the high-pressure breathing gas supply passage to be supplied is inserted, breathing gas can be mixed with breath in the breathing bag,
In addition, the water in the breathing bag, the pump action of the bellows bag ,
Can be extruded positively out of the call吸袋, can prevent a decrease in capacity of the carbon dioxide absorber can be used carbon dioxide absorber over a relatively long period of time.

Further, according to the present invention, since the carbon dioxide absorbing device is also used as the counterweight, when the breathing apparatus is used while being carried on the back, the carbon dioxide absorbing apparatus functions as the counterweight even if the user takes a supine posture during use. Therefore, it is possible to suppress the compression of the breathing bag due to ambient pressure, which affects the pressure.
Not lead to the, also take the lying posture, the carbon dioxide-absorbing devices, because they act to compress the breathing bag, it does not lead to lead to significant degradation of the pressure. Therefore, according to the present invention, even if there is a change in posture such as a supine posture or a prone posture, breathing does not become difficult.

[0026] Further, in the present invention, an exhaust port and a water outlet provided with a check valve is formed on the opposite surface of the mouthpiece of the respiratory chamber of the mouthpiece unit, in contact with the near <br/> exhalation outlet breathing chamber The high-pressure breathing gas inlet is formed, and the projection provided on the valve rod of the on-off valve at the exhalation airflow outlet controls the on-off valve of the breathing gas inlet, so the water vapor in the exhaled breath exhaled to the mouthpiece unit. , And water that enters the mouthpiece during breathing, operate the valve stem of the open / close valve at the exhalation airflow outlet to open the breathing gas inlet and increase the pressure in the breathing chamber of the mouthpiece unit. The check valve at the drain can be opened to push steam and water out of the mouthpiece unit.

Therefore, according to the present invention, water vapor and water existing in the breathing chamber of the mouthpiece unit can be removed by operating the valve rod of the on-off valve at the exhalation airflow outlet at an appropriate interval. possible to reduce the water vapor and water contained in the breath to be delivered to the breathing bag and the auxiliary breathing bag from the absorption capacity of the carbon dioxide absorber by steam or water low
Can prevent the bottom .

[0028]

Embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited by the following description and examples. FIG. 1 is a cross-sectional view for explaining the outline of one embodiment of the present invention, and FIG. 2 is an enlarged partial cross-sectional view showing the outline of the breathing bag and the auxiliary breathing bag of the embodiment of FIG. and 4, respectively, Ru partially enlarged sectional view showing the outline of different operating aspects of the mouthpiece unit in the embodiment shown in FIG.

In the example shown in FIG. 1, the breathing apparatus 1
Is configured to be mounted on the back portion of the diver,
Breathing gas tank 2, airbag 3, auxiliary airbag 4
And a mouthpiece unit 5. In this example, the breathing gas tank 2, the air bag 3, and the auxiliary air bag 4 are installed in a casing formed of a mounting substrate 6 and a cover 7 covering the substrate 6.

In this example, the airbag 3 and the auxiliary airbag 4 are formed adjacent to each other with the intermediate support plate 8 interposed therebetween. The air bag 3 is formed by surrounding a bottom plate 9 and a support plate 8 located above the bottom plate 9 with a first bellows 10. The auxiliary air bag 4 includes an intermediate support plate 8 and the intermediate support plate 8. 8 is formed by surrounding a top plate 11 located above 8 with a second bellows 12. In this example, the top plate 11
Is provided with a carbon dioxide absorption device 13 that also serves as a counterweight.

In this example, the breathing gas tank 2 is a breathing gas cylinder of oxygen, compressed air or the like, and is detachably attached to the mounting substrate 6. Respiratory gas pipe 14 connected to the breathing gas cylinder 2 is connected to a pressure reducer 15 having a plurality of flow paths are branched, a first flow path 16 of the pressure reducer 15, for example, a flexible pipe, It is connected to the weighing device 17.

In the present example, the metering device 17 includes a pressure gauge 18 and a depth gauge 19 so that the diver can see it at any time.
A metering device with is used. However, the depth gauge may include a depth alarm device that issues an alarm when the depth becomes too deep. In this example, any weighing device can be used as long as it is a weighing device provided with a pressure gauge and a depth gauge. In this example, a conventionally known weighing device is used.

The second flow path 20 of the decompressor 15 is connected to the air bag 3 via a filter 21, a flow control valve 22 for adjusting the flow rate of the breathing gas, and a breathing gas supply nozzle 24 connected by a pipe joint 23. Connected. In this example, the breathing gas supply nozzle 24 prevents the water accumulated in the airbag 3 from entering the breathing gas supply nozzle 24.
It is preferably formed so as to project into the airbag 3. The third flow path 25 of the decompressor 15 includes the auxiliary airbag 4
It is connected via the ejection-off valve 26 of the flow control valve. The The ejection <br/> off valve 26, in contact with the projection 27 provided downward in the top plate 11, Ri Contact provided with a control arm 28 for opening and closing the said discharge-off valve 26 , The remaining fourth flow path 29
Is a breathing gas supply pipe to the mouthpiece unit 5, and is connected to the breathing chamber 30 of the mouthpiece unit 5.

As shown in detail in FIG. 2, in this example, the airbag 3 is provided with an intake outlet 31 and an expiratory inlet 32 on the bottom plate 9, and further the bottom portion of the recessed portion 33 of the bottom plate 9. A drain outlet 34 is formed in the. Above the drain outlet 34 of the recess 33, a bellows pump 35 having an upper end fixed to an end plate 35 'and sealed is provided. The lower end of the bellows pump 35 is fixed to the bottom plate 9 of the recess 33 at an appropriate position. Below the bellows pump 35, an annular upper plate member 36 and an annular lower plate member 37 made of rubber are provided. In this example, the upper plate member 36 and the lower plate member 37 made of rubber, to form a liter up valves of the check valve.

In the present example, the bellows pump 35 has an end plate 35 'fixed to the intermediate support plate 8 of the airbag 3.
Since the upper end is fixed and the lower end is fixed to the bottom plate 9 of the recessed portion 33, when the user inhales, it contracts with the contraction of the breathing bag and expands with the expansion of the breathing bag when exhaling. The rubber-made annular plate members 36 and 37 at the lower end of the bellows pump 35 form a gap between the annular plate members 36 and 37 when the bellows pump 35 expands, and form a recess 33.
When the bellows pump 35 contracts, the annular plate members 36 and 37 come into close contact with each other to seal the gap between the annular plate members 36 and 37, and to collect water from the drainage outlet 34 to the recessed portion 33. Water collecting chamber 38 formed below
Let it flow out. At the bottom 39 of the water collection chamber 38,
The check valve 40 water outlet 41 is formed with a by pressure during contraction of the bellows pump, water check valve 40 is opened water collecting chamber 3 within 8 is discharged to the outside.

In this example, a tubular bellows 43 is provided between the intake outlet 31 of the bottom plate 9 and the intake outlet 42 formed in the intermediate support plate 8 so that the intake air and the expiration air do not mix in the airbag 3. Sealed connection. A weir 44 is formed around the intake outlet 42 of the intermediate support plate 8 so that water accumulated in the auxiliary airbag does not enter the tubular bellows 43 for exhalation. An expiratory inlet hole 45 is formed in the intermediate support plate 8, and the expiratory inlet hole 45 and the gas inlet 46 of the carbon dioxide gas absorbing device 13 are hermetically connected by a tubular bellows 47.

In the present embodiment, for example, when the user takes a prone posture, the carbon dioxide absorption device 13 is provided with an airbag 3.
A weir 48 is formed around the exhalation inlet hole 45 of the intermediate support plate 8 on the side of the airbag 3 so as to protrude into the airbag 3 so that water in the inside does not enter. The gas outlet side 49 of 13 is formed so as to protrude inward from the inner surface of the top plate 11. Therefore, the exhaled gas that has entered the gas inlet 46 of the carbon dioxide gas absorption device 13 is absorbed from the carbon dioxide gas inlet flow path by the absorption chamber 5 provided around it.
0 and out of the gas outlet 49.

As shown in detail in FIGS. 3 and 4, the breathing chamber 30 of the mouthpiece unit 5 includes a check valve 5
1 is provided with an exhalation outlet 52, and a check valve 53 is provided with an intake inlet 54. The exhalation outlet 5
2 is the exhalation inlet hole 3 of the airbag 3 via the exhalation tube 55.
2, the intake inlet 54 of the mouthpiece unit 5
Is connected to the intake outlet 31 of the airbag 3 via an intake pipe 56.

In this example, the mouthpiece unit 5 has a breathing chamber 30 on the side of the exhalation outlet 52, which has the mouthpiece 5 attached thereto.
7 is provided, and an exhaust port / drain port 58 is provided on the intake inlet 54 side.
Is provided. A check valve 60, which is biased by a spring 59, is attached to the exhaust port / drain port 58. The check valve 60 has a valve seat 62 formed on the outside of a flange 61 protruding inside the exhaust / drain port 58, and a spring 59 attached to the inside of the flange 61.

In the present example, the opening of the exhaust port / drain port 58 in the breathing chamber 30 opens the breathing gas supply pipe 29,
This is done by increasing the pressure in the breathing chamber 30. However, breathing gas, its mom, so as not to flow out from the expiration outlet 52, when opening the breathing gas supply pipe 29, the expiratory outlet
The exhalation outlet opening / closing valve 6 in which the purge button 64 is biased outward by the compression spring 63 to close the portion 52.
5 is provided on the valve stem 66 which passes through the call-priming chamber 30, and against the expiratory outlet 52. A protrusion 67 is provided on the valve rod 66 of the expiratory outlet opening / closing valve 65. This protrusion 6
7 is formed so as to be able to come into contact with the lever portion 69 of the demand lever 68 when the valve rod 66 projects toward the inside of the breathing chamber 30.

The opening 70 of the breathing gas supply pipe 29 is opened and closed by a breathing gas on-off valve 71 which is connected to a demand lever 68 and is urged by a spring (not shown).
Done by. When the purge button 64 of the expiratory outlet opening / closing valve 65 is pressed to project the valve rod 66 of the opening / closing valve 65 toward the inside of the breathing chamber 30 so as to close the expiratory outlet portion 52, the protrusion 67 of the valve rod 66 becomes The lever portion 69 of the demand lever 68 is pushed to rotate the demand lever 68 counterclockwise, and the breathing gas on-off valve 71 is separated from the opening 70 of the breathing gas supply pipe 29 so that the breathing gas enters the breathing chamber 30. Drain. Purge button 6 of the exhalation outlet opening / closing valve 65
When the hand is released from 4, the valve rod is separated from the exhalation outlet 52 by the action of the compression spring 63, and the projection 67 is moved to the demand lever 6
Apart from 8 of the lever portion 69, by the action of the demand lever 6 8, breathing gas supply pipe 29 is closed.

Since this example is constructed as described above,
The diver attaches the casing 1 to the back side with a string or the like,
Next, the mouthpiece 57 of the mouthpiece unit 5 is held in the mouth to dive. While breathing mouthpiece 57, take the prone position, the expansion of the d ABAC 3 and the auxiliary airbag 4 can be reduced by the compression action of the weight of the carbon dioxide absorber 13. Also, very a supine posture, et ABAC 3 and auxiliary also airbag 4 is compressed, the carbon dioxide-absorbing device shrinkage in volume due to the compression 1
It can be alleviated by the expansion action of the weight of 3.

In this example, due to the respiratory action of the user,
Airbag 3 and the auxiliary airbag 4 is cause contraction and expansion, bellows pump 35 provided in the air bag 3
By the action of, the water that has entered the airbag 3 and the water from the water vapor in the exhaled air are sucked into the bellows pump 35 when the bellows pump 35 expands, and are discharged into the water collection chamber 33 when the bellows pump 35 contracts. The check valve 40 can be opened and the check valve 40 can be discharged to the outside of the water collection chamber 33.

The user cannot avoid invasion of water from around the mouthpiece 57 while holding the mouthpiece 57 in his mouth and breathing underwater, for example. The mouthpiece units 5 water entering, the accumulated in the breathing chamber 30 of the mouthpiece unit 5. Breathing room 30 like this
The water accumulated inside is pushed by pressing the purge button.
The breathing gas is introduced into the breathing chamber 30 from the breathing gas supply pipe 29, the pressure in the breathing chamber 30 is increased by the introduction of the breathing gas, and the water accumulated in the breathing chamber 30 is removed from the mouthpiece unit 5. Can be discharged to. Then, in this example, the auxiliary airbag 4 is compressed, and the airbag 3 is compressed.
When the amount of breathing gas in the auxiliary airbag decreases, the projection 27 of the top plate 11 of the auxiliary airbag 4 pushes the opening / closing arm of the projection valve 26 to open the projection valve 26 , and the high pressure breathing in the auxiliary airbag 4 is performed. Gas is supplied and breathing gas can be automatically supplemented.

When the user exhales, exhalation is sent from the exhalation outlet 52 of the mouthpiece unit 5 to the airbag 3 and the volume of the airbag 3 increases. Breathing gas is supplied from the nozzle 24
It The supply of gas to the carbon dioxide absorption device 13 is performed by the pressure that the user inhales, and the air containing carbon dioxide gas in the airbag 3 is passed through the carbon dioxide absorption device 13 by the breathing action of the user. Absorption of carbon dioxide is performed.
And carbon dioxide is removed in this way, and only air is
Is sent to the intake pipe 56, is supplied to the breathing chamber 30 of the mouthpiece unit 5, the user can suck the air

The case where the semi-closed breathing apparatus is attached to the back has been described above. However, even when the apparatus is attached to the chest, the pressure is affected by the posture of the user as in the case where the apparatus is attached to the back.
There is no received Rukoto. Therefore, in this example, the airbag 3 and the auxiliary airbag 4 maintain the same internal pressure as that of the lungs in both the back wearing and the chest wearing.
The volume of can be made substantially constant. Therefore, the user can perform the same breathing action regardless of the posture in water.

[0047]

According to the present invention, a breathing bag and an auxiliary breathing bag are provided, an inspiratory flow path is formed by a bellows in the breathing bag, a breathing gas introduction path is inserted, a bellows bag is formed, and water is provided below it. In the auxiliary breathing bag, on the other hand, the expiratory flow path is formed by the bellows in the auxiliary breathing bag, and on the top plate of the auxiliary breathing bag,
Counter carbon dioxide absorber arranged in weight combined, since the insertion of the high-pressure call <br/>吸Ga scan supply path for supplying breathing gas in contact with the projection provided on the top plate, the conventional semi-closed type breathing Compared with the device, the pressure and volume of the breathing gas can be automatically supplemented, the deterioration of the capacity of the carbon dioxide absorption device can be prevented, and the semi-closed breathing device is used for a relatively long time. be able to.

Further, in the present invention, since the carbon dioxide absorption device is also used as the counterweight, compared with the conventional semi-closed breathing apparatus, even if the posture changes such as a supine posture or a prone posture during use, breathing is possible. Does not become painful. Furthermore, the present invention is a semi-closed breathing apparatus, wherein a drain port having a check valve is formed on the surface of the breathing chamber of the mouthpiece unit opposite to the mouthpiece, and the breathing air outlet of the breathing chamber is formed. The breathing gas inlet is formed in the vicinity, and the protrusions on the valve stem of the exhalation airflow outlet control the opening / closing valve of the breathing gas inlet, so compared to conventional mouthpiece units. The water vapor and water can be pushed out of the mouthpiece unit by opening the check valve of the drain port by a simple operation such as button operation. Therefore, according to the present invention, the water vapor and water existing in the breathing chamber of the mouthpiece unit can be removed by operating the valve rod of the on-off valve of the exhalation air flow outlet at an appropriate interval. compared to the apparatus, can reduce the water vapor and water contained in the breath sent from the mouthpiece unit to the breathing bag and the auxiliary breathing bag can be used over a long time carbonated gas absorber.

In the present invention, the carbon dioxide adsorbing device is mounted at a position where the breathing bag is expanded and contracted, so that the weight of the carbon dioxide absorbing device resists the expansion or contraction action of the ambient pressure on the breathing bag. Because of the weight of the CO2 adsorption device, the internal pressure of the breathing bag can be maintained at an internal pressure that is similar to the internal pressure of the lungs, regardless of the posture of the user. It has the effect of being able to perform the respiratory action.

Further, according to the present invention, as described above, the breathing gas from the tank is introduced into the breathing chamber of the mouthpiece unit through the pipe, and the opening portion of the pipe is opened when the purge button is operated to breathe the breathing gas. Was introduced into the breathing chamber to make it pressurized, and the check valve at the drain port provided in the breathing chamber was opened to drain the water in the breathing chamber, so compared to the conventional semi-closed breathing apparatus, Drainage work can be performed very easily.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall outline of an embodiment of the present invention.

2 is an enlarged partial cross-sectional view schematically showing a breathing bag and an auxiliary breathing bag in the embodiment of FIG.

FIG. 3 is a partial cross-sectional view schematically showing one operation mode of the mouthpiece unit in the embodiment shown in FIG. 1 during normal use.

FIG. 4 is a partial cross-sectional view schematically showing one operation mode during drainage of the mouthpiece unit in the embodiment shown in FIG.

[Explanation of Codes] 1 Breathing apparatus 2 Breathing gas tank, breathing gas cylinder 3 Air bag 4 Auxiliary air bag 5 Mouthpiece unit 6 Mounting substrate 7 Cover 8 Intermediate support plate 9 Bottom plate 10 First bellows 11 Top plate 12 Second 2 Bellows 13 Carbon dioxide absorption device 14 Breathing gas 15 Pressure reducer 16 First channel 17 of pressure reducer 17 Metering device 18 Residual pressure gauge 19 Depth meter 20 Second channel of pressure reducer 21 Filter 22 Flow control valve 23 Pipe recessed breathing chamber 31 intake outlet 32 expiratory inlet 33 of the third channel 26 ejection off valve 27 fourth protrusion 28 the control arm 29 pressure reducer flow paths 30 mouthpiece unit of the joint 24 the respiratory gas supply nozzle 25 pressure reducer Part 34 Drain outlet 35 Bellows pump 35 'End plate 36 Upper annular plate member 37 Lower annular plate member 38 Water collection chamber 39 Water Bottom of collection chamber 40, 51, 53, 60 Check valve 41 Water outlet 42 Inlet outlet 43, 47 Tubular bellows 44, 48 Weir 45 Expiratory inlet 46 Carbon dioxide absorber gas inlet 49 Carbon dioxide absorber gas outlet 50 Carbon dioxide absorption chamber 52 Expiration outlet of breathing chamber of mouthpiece unit 54 Inhalation inlet of breathing chamber of mouthpiece unit 55 Expiratory tube 56 Inhalation tube 57 Mouthpiece 58 Exhaust / drainage port 59 Spring 61 Flange 62 Valve seat 63 Compression Spring 64 Purge button 65 Exhalation outlet opening / closing valve 66 Valve rod 67 Expiration outlet opening / closing valve projection 68 Demand lever 69 Demand lever lever portion 70 Breathing gas supply pipe opening 71 Breathing gas opening / closing valve

Claims (3)

[Claims] 1. A mouthpiece unit, a breathing bag connected to an inspiratory flow path of the mouthpiece unit, connected to an expiratory flow path of the mouthpiece unit, and further provided with an exhaust valve, and a pressurized breathing connected to the breathing bag. In a semi-closed breathing apparatus including a gas tank and a carbon dioxide absorbing device, a breathing bag includes a lower support plate and an intermediate plate, a space between the lower support plate and the intermediate plate is surrounded by a bellows, and a respiratory gas supply control The auxiliary breathing bag is formed by providing a breathing gas supply hole connected to the valve, and the auxiliary breathing bag includes the intermediate plate and the top plate, and the space between the intermediate plate and the top plate is surrounded by a bellows, and the main breathing bag and the At the adjacent position with the intermediate plate in between,
A pressurized breathing gas supply pipe connected to a breathing gas supply control valve is formed by being inserted, and the lower support plate has an opening for exhalation connected to an exhalation flow path from a breathing chamber of the mouthpiece unit. Along with this, a drainage port is provided, the intermediate plate is provided with an opening for exhalation, and the top plate is formed with a protruding portion toward the intermediate plate, and a carbon dioxide absorption device is attached. In the breathing bag, a tubular bellows having an end plate fixed to the intermediate plate and provided toward the drain port of the lower support plate is an open end portion of the tubular bellows when the breathing bag is inflated. And a drainage outlet having a length that forms a narrow gap around the drainage port of the lower support plate, a water collecting chamber is formed below the drainage port, and has a check valve at the bottom thereof. In the auxiliary breathing bag, The exhalation flow passage is formed by sealingly enclosing a bellows between the gas inlet of the carbon dioxide absorbent and the exhalation opening of the intermediate plate, and the breath provided in the auxiliary breathing bag. The gas supply control valve includes a control arm having a length capable of contacting the protrusion of the top plate when the auxiliary breathing bag is compressed, and the control valve contacts the protrusion of the top plate. When I did
A semi-closed breathing apparatus for performing an opening operation of a breathing gas supply control valve, wherein a carbon dioxide absorption device provided on the top plate is formed so as to act as a counterweight. 2. A mouthpiece unit, a breathing bag connected to the inspiratory flow path of the mouthpiece unit, connected to the expiratory flow path of the mouthpiece unit, and further provided with an exhaust valve, and a pressurized breathing connected to the breathing bag. In a semi-closed breathing apparatus including a gas tank and a carbon dioxide absorbing device, a breathing bag includes a lower support plate and an intermediate plate, a space between the lower support plate and the intermediate plate is surrounded by a bellows, and a respiratory gas supply control The auxiliary breathing bag is formed by providing a breathing gas supply hole connected to the valve, and the auxiliary breathing bag includes the intermediate plate and the top plate, and the space between the intermediate plate and the top plate is surrounded by a bellows, and the main breathing bag and the At the adjacent position with the intermediate plate in between,
A pressurized breathing gas supply pipe connected to a breathing gas supply control valve is inserted and formed, and the lower support plate corresponds to an inspiratory flow path and an expiratory flow path from the breathing chamber of the mouthpiece unit, respectively. In addition to having an opening for inhalation and an opening for exhalation, which is connected by a A protrusion is formed toward the carbon dioxide absorption device, and an intake opening of the lower support plate and an intake opening of the intermediate plate are formed by bellows in the breathing bag. A flow path for inhalation is formed by being enclosed and enclosed, and in the breathing bag, the end plate is fixed to the intermediate plate, and the cylindrical bellows provided toward the drainage port of the lower support plate is When the breathing bag is inflated, the tubular shape It is provided with a length that forms a narrow gap around the open end of the bellows and the drain of the lower support plate, and a water collecting chamber is formed below the drain, and a check valve is provided at the bottom of the water collecting chamber. It has a drainage outlet for having, in the auxiliary breathing bag, the flow path for exhalation,
The breathing gas supply control valve provided in the auxiliary breathing bag is formed by hermetically enclosing a gas inlet of the carbon dioxide absorbing device and an opening for exhalation of the intermediate plate with a bellows. Is provided with a control arm having a length capable of contacting the protruding portion of the top plate when compressed, and the control valve, when contacting the protruding portion of the top plate, controls the respiratory gas supply control valve. A semi-closed breathing apparatus, which performs an opening operation, wherein the carbon dioxide absorbing device provided on the top plate is formed so as to act as a counterweight. 3. A mouthpiece unit, a breathing bag connected to an inspiratory flow path of the mouthpiece unit, and connected to an expiratory flow path of the mouthpiece unit, and further provided with an exhaust valve, and a pressurized breathing connected to the breathing bag. In a semi-closed breathing apparatus including a gas tank and a carbon dioxide absorbing device, a breathing bag includes a lower support plate and an intermediate plate, a space between the lower support plate and the intermediate plate is surrounded by a bellows, and a respiratory gas supply control The auxiliary breathing bag is formed by providing a breathing gas supply hole connected to the valve, and the auxiliary breathing bag includes the intermediate plate and the top plate, and the space between the intermediate plate and the top plate is surrounded by a bellows, and the main breathing bag and the At the adjacent position with the intermediate plate in between,
A pressurized breathing gas supply pipe connected to a breathing gas supply control valve is inserted and formed, and the lower support plate corresponds to an inspiratory flow path and an expiratory flow path from the breathing chamber of the mouthpiece unit, respectively. In addition to having an opening for inhalation and an opening for exhalation connected to each other, a drainage port is provided, the intermediate plate has an opening for inhalation and an opening for exhalation, and the top plate is an intermediate plate. A protrusion is formed toward the carbon dioxide absorbent, and a carbon dioxide absorption device is attached. In the breathing bag, the inhalation opening of the lower support plate and the inhalation opening of the intermediate plate are formed by bellows. An air flow path for inhalation is formed by being enclosed and enclosed, and in the breathing bag, the end plate is fixed to the intermediate plate, and the cylindrical bellows provided toward the drain port of the lower support plate is the breathing bag. When the bag is inflated, Wherein the open end portion of the Rose provided with a length which forms a narrow gap around the drain outlet of the lower support plate, the water collecting chamber is formed below the drain outlet,
It has a drainage outlet with a check valve at its bottom,
In the auxiliary breathing bag, the flow path for exhalation is formed by hermetically enclosing a gas inlet of the carbon dioxide absorption device and an opening for exhalation of the intermediate plate with a bellows. A control valve for supplying a breathing gas provided therein includes a control arm having a length capable of contacting a protruding portion of the top plate when the auxiliary breathing bag is compressed, and the control valve is the top plate. When it comes into contact with the protruding part of
In order to perform the opening operation of the control valve for breathing gas supply, the carbon dioxide absorbing device provided on the top plate is formed to act as a counterweight, and the breathing chamber of the mouthpiece unit is The lower support plate of the breathing bag is provided with an inspiratory inlet and an expiratory air outlet, which are respectively connected to the inspiratory opening and the expiratory opening, and the respiratory gas introducing port equipped with a demand lever is An exhaust port / drainage port provided in the vicinity of the outlet and having a check valve is formed at the bottom of the breathing chamber, and the valve for controlling the opening / closing of the exhalation air flow outlet is provided across the breathing chamber. A protrusion having a valve rod extending to the exhalation airflow outlet, a valve body capable of contacting liquid-tightly with the exhalation airflow outlet at the tip end portion of the valve rod, and a shape capable of contacting the demand lever at the middle portion of the valve rod. Semi-closed, characterized by the formation of Breathing apparatus.