JPH07215288A - Carbon dioxide adsorbent container of respiration device for diving - Google Patents

Abstract

PURPOSE:To provide a carbon dioxide adsorbent container which can be exchanged easily, can prevent the generation of a clearance where a carbon dioxide does not exist at the inside in the operating condition, and can be formed simply. CONSTITUTION:This carbon dioxide adsorbent container 710 of a respiration device for diving has an outer tube 720 whose one side end face is made in a sealed bottom face; an inner tube 730 which can be inserted through a bottom hole opened at the center of the sealed bottom face of the outer tube 720, and its one side end face is made in a sealed end face; and a lid 750 which can be inserted to the opening of the outer tube 720, in which an inserting hole to insert the front end of the inner tube 730 is formed. lid 750 is installed to the outer tube and the inner tube allowable to mount and demount, in the condition preventing its removal from the outer tube and the inner tube. This container 710 can be composed of three members having a simple structure formed separately, and the formation of the three members can be carried out also simply. The carbon dioxide adsorbent can be exchanged only by connecting and disconnecting the container to the respiration device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon dioxide adsorbing device for use in a diving respiratory device such as a semi-closed respiratory device or a closed respiratory device.

[0002]

2. Description of the Related Art In a semi-closed breathing apparatus and a closed breathing apparatus, expired air is regenerated through a carbon dioxide adsorption device and used as inhalation gas. Conventionally, the carbon dioxide adsorption device is used by replacing it with a new one each time diving.

This replacement operation is an operation in which the case of the carbon dioxide adsorbing device is opened, the carbon dioxide adsorbent filled therein is taken out, and a new carbon dioxide adsorbent is refilled. In this work, it is necessary to uniformly fill the carbon dioxide adsorbent. If it is not filled in this way, the gas passing through the carbon dioxide adsorbing device will pass without being removed, and the carbon dioxide adsorbability will be reduced. Therefore, this work requires skill and it is difficult to perform the work in a short time.

Further, even if the carbon dioxide gas adsorbent is filled in an appropriate state, the carbon dioxide gas adsorbent is more compressed due to vibration applied during use, and a space is left in the space filled with the carbon dioxide gas adsorbent. It may be possible. If such a gap is formed, an adverse effect such as exhaled breath passing through without being purified occurs.

In view of such a point, an object of the present invention is to
An object of the present invention is to propose a carbon dioxide gas adsorbing device which can be easily replaced and does not cause a gap during use.

Another object of the present invention is to propose a carbon dioxide gas adsorbent container suitable for use in such a carbon dioxide gas adsorption device.

[0007]

In order to solve the above problems, a carbon dioxide gas adsorbing device for a diving breathing apparatus according to the present invention is a hollow casing having an opening formed on one side, and is attached to and detached from the opening. A lid that can be attached, a carbon dioxide adsorbent container that is detachably accommodated in a closed space defined by the casing and the lid, and a carbon dioxide adsorbent that is filled in the carbon dioxide adsorbent container. It consists of

The above carbon dioxide adsorbent container can be inserted from an outer cylinder having one end surface serving as a closed bottom surface and a bottom hole opened at the center of the closed bottom surface of the outer cylinder, and one end surface is sealed. An inner cylinder serving as a bottom surface, and a lid that can be fitted into the opening of the outer cylinder and has a fitting hole into which a tip portion of the inner cylinder can be fitted are formed. An engaging portion is formed on the inner peripheral surface of the lid and the outer peripheral surface of the lid to prevent the lid from coming off in a detachable state, and the end outer peripheral surface of the inner cylinder and the outer peripheral surface of the fitting hole of the lid are formed. Is formed with an engagement portion that prevents the lid from coming off in a detachable state, and the peripheral surfaces of the outer cylinder and the inner cylinder are gas passage surfaces.

In the container of this structure, the inner cylinder is inserted from the bottom hole of the outer cylinder, and then the annular space formed between the outer cylinder and the inner cylinder is filled with the carbon dioxide adsorbent, and thereafter, It is configured by fitting the lid into the outer cylinder and the inner cylinder.

Further, the container housed in the casing is configured such that the lid portion is biased toward the side of the filled carbon dioxide adsorbent by elastic means such as a coil spring.

[0011]

In the carbon dioxide adsorption device of the present invention,
If you prepare a carbon dioxide adsorbent container filled with carbon dioxide adsorbent, simply put it in the casing,
The replacement work of the carbon dioxide adsorbent is completed. Also, during use, the lid is pressed toward the side of the filled carbon dioxide adsorbent. Therefore, even if the carbon dioxide adsorbent is compressed, the lid moves accordingly, so that no gap is formed.

The carbon dioxide adsorbent container of the present invention is constructed by combining three separate parts, an outer cylinder, an inner cylinder and a lid. Since the shape of each component is not complicated, it can be easily molded using a material such as synthetic resin.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a semi-closed breathing apparatus having a built-in carbon dioxide adsorption apparatus to which the present invention is applied.

First, as shown in FIG. 1, the semi-closed breathing apparatus 1 of the present embodiment includes a hollow housing 2, and the hollow housing 2 contains the device components described later. One side of the hollow housing 2 serves as a back support surface 2a that contacts the back of the diver, and an opening for replacing a breathing gas cylinder is formed in the center of the opposite surface, and a lid 2b is detachably attached thereto. Installed. Hollow housing 2
A carbon dioxide adsorption device built-in container 3 is horizontally attached to the upper end of the. This container has a cylindrical shape as a whole, and flexible expiratory tubes 4 and inspiratory tubes 5 are connected to the outer peripheral portions on both sides thereof. The tip ends of the expiratory tube 4 and the inspiratory tube 5 are connected to the mouthpiece unit 6.

With reference to FIG. 2, the main components of the apparatus 1 of this example and their connection states will be described. As shown in this figure, the respiratory air flow chamber 61 in the mouthpiece unit 6
Communicate with the expiratory tube 4 and the inspiratory tube 5. Exhalation tube 4
The other end of the intake pipe 5 and the other end of the intake pipe 5 communicate with both sides of the cylindrical container 3 in which the carbon dioxide adsorbing device 7 is incorporated. That is, the carbon dioxide adsorbing device 7 having an annular cross section is built in the center of the container 3, and an exhalation passage 31 and an inhalation passage 32 are formed on both sides thereof, respectively. A breathing gas cylinder 8 is vertically arranged in the center of a hollow housing 2 below the container 3 in which a carbon dioxide adsorbing device 7 is built. An air bag 11 is arranged. The exhalation air bag 9 communicates with the exhalation passage 31 of the container 3, and the inhalation air bag 11 communicates with the inhalation passage 32 of the container 3.

The breathing gas cylinder 8 is arranged so that its gas discharge port 81 is located at the lower end, and this gas discharge port 81 is connected to a regulator 83 via an opening / closing valve 82. The regulator 83 reduces the gas pressure to about 8 to 9 kilograms / square centimeter. Six gas supply pipes are connected to the regulator 83, three of which are for the residual pressure indicator, the BC jacket, and the octopus (not shown). One of the remaining three gas supply pipes 84 extends into the mouthpiece unit through the intake passage 32 and the intake pipe 5 of the carbon dioxide adsorption device built-in container 3. A flow rate adjusting orifice 84a is inserted at an intermediate position, and the flow rate is adjusted to 4 to 5 liters / minute through the orifice 84a to be supplied into the mouthpiece unit. The other gas supply pipe 85 is a gas supply pipe for purging used for draining water from the mouthpiece unit 6, and extends to the inside of the mouthpiece unit 6 similarly to the gas supply pipe 84 described above. There is. Remaining one gas supply pipe 86
Is for supplying intake air in an emergency, and its tip is located in the intake passage 32 of the container 3.

An auto valve mechanism 12 is attached to the end of the carbon dioxide adsorption device built-in container 3 on the intake side. The mechanism 12 controls opening / closing of the gas supply pipe 86 and automatic exhaust gas exhaust control.

The overall gas flow is as follows:
Exhaled air from the mouthpiece 62 of the mouthpiece unit 6 is stored in the expired air bag 9 via the expiratory tube 4 and the expiratory passage 31. At the time of inhalation operation, the exhaled breath stored here is cleaned by removing carbon dioxide gas through the carbon dioxide adsorption device 7 and flows into the intake passage 32. The thus exhaled breath is stored in the inhalation air bag 11 and is supplied into the mouthpiece unit 6 through the inhalation pipe 5 for inhalation. A constant flow rate of new intake gas is constantly introduced into the mouthpiece unit 6 from the cylinder 8 via the gas supply pipe 84, and a mixed gas of these is supplied as the intake gas.

Next, the structure of the carbon dioxide adsorbing device 7 of this embodiment will be described with reference to FIGS. 3 to 6.

The carbon dioxide adsorbing device 7 is housed in a container 3 having a cylindrical shape as a whole. On the outer peripheral surface on one side of the container 3, an expiratory tube connecting part 311 and an expiratory air bag connecting part 312 are formed respectively on the upper and lower sides, and the expiratory tube 4 and the expiratory air bag 9 are connected to these, respectively. Has been done. An intake pipe connecting portion 313 and an intake air bag connecting portion 314 are formed on the outer peripheral surface on the other side of the container 3, respectively, and the intake pipe 5 and the intake airbag 11 are connected to these, respectively.

A hollow cylindrical lid 322 is screwed and fixed to the opening of the container 3 on the side where the exhalation tube is connected so that the lid 322 is sealed. A large number of exhalation communication holes 323 are formed on the outer peripheral wall of the lid 322. Therefore, the hollow portion of the lid functions as an expiratory passage 31 that connects the expiratory tube 4 and the expiratory air bag 9 to each other. In addition, a cylindrical communication pipe 325 penetrates through the center of the circular end surface 324 of the lid 322, and the expiratory passageway 31 is connected through the communication pipe 325.
Communicates with the hollow portion 71 of the carbon dioxide adsorption device 7.

A hollow bottom lid 127, to which the auto valve mechanism 12 is attached, is screwed and fixed to the opening on the other side of the container 3 so as to be in a sealed state. An intake passage 3 is provided between the bottom cover 127 and the carbon dioxide adsorption device 7 in the container 3.
2 are sectioned.

The carbon dioxide gas adsorbent container 710 constituting the carbon dioxide gas adsorption device 7 has an outer cylinder 720 and an inner cylinder 730, and is enclosed in a space of an annular cross section defined between them. The carbon dioxide adsorbent 740 is filled. One end surface of the outer cylinder 720 is a closed bottom surface 721, and a bottom hole 722 is formed at the center thereof. Inner cylinder 7
One end surface of the 30 has a large-diameter closed bottom surface 731, and the other end 30 is inserted into the bottom hole 722 of the outer cylinder. The inside of the inner cylinder is the hollow portion 71. A disc-shaped lid 750 is attached to the opening sides of the outer cylinder and the inner cylinder assembled in the concentric state in this way.

The lid 750 has an outer peripheral wall 751 and an inner peripheral wall 752. The outer peripheral wall 751 has a slightly thinned tip end side, whereby an annular stepped portion 753 is formed on the outer peripheral surface thereof. Similarly, the inner peripheral wall 752 is also slightly thinned on the tip side thereof, thereby forming an annular step 754 on the inner peripheral surface thereof. On the other hand, on the inner peripheral surface of the outer cylinder 720 on the tip opening side, the annular protrusion 72 having an inner diameter slightly smaller than the outer diameter of the outer peripheral wall of the lid on the base end side.
3 is formed, and on the outer peripheral surface of the inner cylinder 730 on the tip opening side,
An annular protrusion 732 having an outer diameter slightly larger than the inner diameter of the inner peripheral wall of the lid on the base end side is formed. An annular projection 733 is also formed on the outer peripheral surface on the bottom side of the inner cylinder 730, and has an outer diameter dimension slightly larger than the inner diameter of the inner peripheral wall of the bottom hole 722 of the outer cylinder.

On the other hand, on the outer peripheral wall of the outer cylinder 720, a large number of gas passage holes 724 are formed except for the bottom surface and the tip opening side. Further, four ribs 725 are formed at 90-degree intervals in the axial direction. By the rib 725, a passage communicating with the intake communication chamber 32 is formed between the inner peripheral surface of the container 3 and the outer cylinder 720. Further, also on the inner cylinder 730 side, a large number of gas passage holes 734 are formed on the outer peripheral wall except the bottom surface and the tip opening side.

The carbon dioxide adsorbent container 710 thus constructed is
The inner cylinder 730 is inserted from the bottom hole 722 of the outer cylinder 720, and thereafter, the carbon dioxide gas adsorbed in the breathable non-woven bag is filled in the annular space 760 formed between the outer cylinder and the inner cylinder. Attach the agent 740, and then cover 75
It is configured by fitting 0 into the tips of the outer cylinder and the inner cylinder.

The carbon dioxide adsorbent container 710 thus assembled is installed in the container 3 with the lid 322 opened. Lid 322 and lid 7 of carbon dioxide adsorbent container 710
A coil spring 770 is inserted between 50 in a compressed state.

In the carbon dioxide adsorbing device 7 of the present embodiment thus constructed, the exhaled air enters the hollow portion 71 of the inner cylinder 730 from the side of the expiratory passage 31 through the communication pipe 325, and thereafter, the exhaled air of the inner cylinder is removed. It enters into the carbon dioxide gas adsorbent 740 through the gas passage hole 734, is regenerated through this, and then exits to the outside through the gas passage hole 724 of the outer cylinder and is supplied to the intake passage 32 side. .

In the carbon dioxide gas adsorbing apparatus of this embodiment, the carbon dioxide gas adsorbent can be replaced by simply replacing the carbon dioxide gas adsorbent container 710. Carbon dioxide adsorbent 74
If the carbon dioxide adsorbent container 710 prefilled with 0 is prepared and placed in advance, the replacement work can be easily performed. Alternatively, by removing the lid 750 of the carbon dioxide adsorbent container 710,
The carbon dioxide adsorbent filled in this may be replaced.

Here, the lid 7 of the carbon dioxide adsorbent container 710
50 is an annular protrusion 7 with respect to the opening side of the outer cylinder and the inner cylinder.
By 23 and 754, it is fitted in the state in which it is prevented from coming off. However, the coil spring 7 can be moved inward, and when mounted in the container 3, the coil spring 7
It is pressed by 70. Therefore, even if the carbon dioxide adsorbent filled inside is compressed due to vibration or the like during use, it moves inward according to the compression,
There is no formation of a gap inside which no carbon dioxide adsorbent is present. Therefore, even if the carbon dioxide adsorbent is compressed, proper regeneration can always be performed.

On the other hand, the carbon dioxide adsorbent container 710 of this example
Is constructed by assembling the outer cylinder 720, the inner cylinder 730, and the lid 750. Therefore, unlike the case where these are integrally molded, they can be easily molded.

[0032]

As described above, the carbon dioxide gas adsorbing device for the diving respiration apparatus of the present invention has a hollow casing having an opening formed on one side, and a lid detachably attached to the opening. It is composed of a carbon dioxide adsorbent container detachably housed in a closed space defined by these casings and lids, and a carbon dioxide adsorbent filled in the carbon dioxide adsorbent container. Therefore, in advance,
If you prepare a carbon dioxide adsorbent container filled with carbon dioxide adsorbent, simply put it in the casing,
It is convenient because it is possible to change the carbon dioxide adsorbent.

The carbon dioxide adsorbent container of the present invention is constructed by combining an outer cylinder, an inner cylinder, and a lid, which are separate parts. Therefore, the shape of each part is not complicated, so use a material such as synthetic resin,
There is an advantage that it can be easily molded.

Further, the lid of the carbon dioxide gas adsorbent container is attached in a state of being pressed toward the side filled with the carbon dioxide gas adsorbent by an elastic means such as a coil spring. Therefore, even if the carbon dioxide adsorbent is further compressed by vibration during use, the lid moves following it. Therefore, there is an advantage that a gap in which the carbon dioxide adsorbent does not exist does not occur.

[Brief description of drawings]

FIG. 1 is an external perspective view of a semi-closed breathing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing an overall configuration of a semi-closed breathing apparatus.

FIG. 3 is an enlarged schematic cross-sectional view showing a portion of a carbon dioxide adsorption device mounted on the semi-closed breathing apparatus of FIG.

FIG. 4 is an exploded perspective view showing the configuration of a carbon dioxide gas adsorbent container that constitutes the carbon dioxide gas adsorption device of FIG.

FIG. 5 is a vertical cross-sectional view of a carbon dioxide adsorbent container.

6A and 6B are views showing a carbon dioxide adsorbent container, in which FIG. 6A is a right side view thereof, FIG. 6B is a front view thereof, and FIG. 6C is a left side view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Semi-closed breathing apparatus 3 ... Carbon dioxide adsorption device built-in container 31 ... Exhalation passage 32 ... Intake passage 322 ... Lid of container 4 ... Exhalation pipe 5 ... Inhalation pipe 7 ... Carbon dioxide adsorbing device 710 ... Carbon dioxide adsorbent container 720 ... Outer cylinder 721 ... Bottom wall 722 ... Bottom hole 723 ... Annular protrusion 724 ... Gas passage hole 725 ... .... Rib 730 ... Inner cylinder 731 ... Bottom wall 732 ... Annular projection 733 ... Annular projection 734 ... Gas passage hole 740 ... Carbon dioxide adsorbent 750 ... Lid 751 ... -Outer peripheral wall 752 ... Inner peripheral wall 753, 754 ... Step portion 770 ... Coil spring

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[Procedure amendment]

[Submission date] August 19, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Figure 5]

[Fig. 2]

[Figure 3]

[Figure 6]

[Figure 4]

Claims (2)

[Claims] 1. Exhaled air collected from a mouthpiece unit is regenerated by passing through a carbon dioxide adsorbing device, and the regenerated gas and a constant flow rate of new inhalation gas supplied from a breathing gas cylinder are inhaled into the mouthpiece unit. In a diving respiration apparatus configured to be supplied as a gas for use, the carbon dioxide adsorbing device includes a hollow casing having an opening formed on one side, a lid detachably attached to the opening, and It is composed of a carbon dioxide adsorbent container detachably housed in a closed space defined by a casing and a lid, and a carbon dioxide adsorbent filled in the carbon dioxide adsorbent container. The adsorbent container can be inserted from an outer cylinder with one end surface serving as a sealing bottom surface and a bottom hole opened at the center of the sealing bottom surface of this outer cylinder. An inner cylinder serving as a bottom surface, and a lid that can be fitted into the opening of the outer cylinder and has a fitting hole into which a tip portion of the inner cylinder can be fitted are formed. An engaging portion is formed on the inner peripheral surface of the lid and the outer peripheral surface of the lid to prevent the lid from coming off in a detachable state, and the end outer peripheral surface of the inner cylinder and the outer peripheral surface of the fitting hole of the lid are formed. Is formed with an engagement portion that prevents the lid from coming off in a detachable state, and the peripheral surfaces of the outer cylinder and the inner cylinder serve as gas passage surfaces, and the inner hole extends from the bottom hole of the outer cylinder. Insert the tube, and after that,
The carbon dioxide adsorbent is filled in the annular space formed between the outer cylinder and the inner cylinder, and then the lid is fitted into the outer cylinder and the inner cylinder to form the carbon dioxide adsorbent container. A carbon dioxide gas adsorbing device, characterized in that the lid of the carbon dioxide gas adsorbent container is biased by an elastic means toward the filled carbon dioxide gas adsorbent. 2. A carbon dioxide gas adsorbent container comprising the structure according to claim 1.