RU2295367C2 - Regenerative cartridge of diver respirator aggregate - Google Patents

Abstract

FIELD: medical engineering.

SUBSTANCE: device has casing having cavity filled with regenerative substance, inlet branch pipe for delivering gas mixture exhaled by the diver into the cartridge and the outlet branch pipe connected to cavity outlet. Chamber is placed before the mentioned cavity. It is connected to the inlet branch pipe on one side, and to the mentioned cavity through a canal on the other side. The external wall of the chamber is manufactured from high heat conductivity material. Thus, the mentioned channel is located in the middle chamber cross-section so that water does not come into the cavity filled with regenerative substance from the chamber through the canal in cartridge operation time. The chamber has device for discharging water.

EFFECT: condensate separated from exhaled gas mixture remains in the chamber; excluded gas ingress into the cavity with regenerative substance; improved gas drying condition and cartridge recovery capacity.

6 cl, 3 dwg

Description

The invention relates to the field of diving equipment and is intended for use in regenerative type diving breathing apparatus, providing for cleaning the respiratory mixture.

Known regenerative cartridge diving breathing apparatus containing a cavity with a regenerating substance associated with the supply of a gas mixture exhaled by a diver, and a cavity into which the gas mixture enters after chemical cleaning associated with the inhalation tube of a diving breathing apparatus (patent RU 2194552, IPC A 62 B 19 / 02, B 63 C 11/28, publ. 12/20/2002).

Also known patent US 3767367, IPC 01 J 7/00, publ. 23.10.73, which describes the design of the cartridge for the regeneration of a gas exhaled by a diver.

The closest in technical essence and the achieved result is the regenerative cartridge of a diving breathing apparatus according to patent JP 2002-012193, IPC B 63 C 11/22, publication date 01/15/02. The design comprises a housing in the form of an external and an internal cylinder, the inner cylinder being made porous and filled with a regenerating substance, an inlet pipe for the gas mixture exhaled by the diver to enter the cartridge, and an outlet pipe connected to the cavity outlet.

The known design of the cartridge does not allow to drain the gas mixture exhaled by the diver before entering the cavity filled with the regenerating substance. Therefore, the efficiency of regeneration is reduced, since part of the regenerating substance interacts with the moisture contained in the exhaled mixture, and its ability to regenerate is reduced.

The claimed invention allows to reduce the flow of moisture into the cavity with a regenerating substance, which increases the regenerating ability of the cartridge during the entire period of its operation.

The regenerative cartridge of the diving breathing apparatus contains a housing with a cavity filled with a regenerating substance, an inlet pipe for the gas mixture exhaled by the diver to enter the cartridge, and an outlet pipe connected to the cavity outlet. In front of the cavity there is a chamber connected on one side to the inlet pipe, and on the other hand, through the channel with the cavity. The outer wall of the chamber is made of a material with high thermal conductivity. The channel is located so that during the operation of the cartridge, water from the chamber through the channel does not enter the cavity with the regenerating substance.

A chamber with a wall made of a material with high thermal conductivity, during operation of the cartridge in contact with the external environment, water, and works as a heat exchanger. The outer wall of the chamber is cooled and moisture exhaled by the diver (scuba diver) condenses on its inner surface, because the exhaled gas mixture has a temperature higher than the temperature of the surrounding water. The condensate remains in the chamber and does not enter the cavity with the regenerating substance, which achieves the claimed technical result. In particular, so that the condensed liquid does not enter the cavity, the channel may be located in the middle section of the chamber.

The value of the chamber is not limited to the condensation of water from a gas mixture. Due to the channel and its corresponding location, water is also retained in the chamber, which can enter the diver’s respiratory system from the external environment.

For effective condensation of the liquid, the outer wall of the chamber can be made of metal. For the same purpose, the surface of the chamber wall facing the environment can be made with a developed surface, in particular ribbed.

The channel connecting the said chamber with the cavity, and the inlet pipe can be located relative to each other with the possibility of passing the gas exhaled by the diver in the chamber mainly at the wall. In this case, the contact time of the exhaled gas mixture with the cold wall is increased and the efficiency of heat transfer and condensation is increased.

For more reliable operation of the cartridge, the chamber may be equipped with a water removal device. The device for removing water in a particular case can be made in the form of a drain valve and is located in the lower part of the chamber. In combination of all these factors, the effect of draining the gas mixture arises.

The invention is illustrated by drawings.

Figure 1 shows the axial section of the cartridge; figure 2 is an end view from the side of the nozzles; figure 3 - shows the passage of the gas mixture in the cartridge.

The regenerative cartridge (FIG. 1, FIG. 2) consists of a housing 1, a cavity 2 filled with regenerating substance 3, a central channel 12. The cavity 2 is divided by permeable partitions into several modules, spring-loaded with 10 springs relative to the sealed cover 11. On the opposite side in the cartridge hermetically formed molded pipe 13, forming with the Central channel 12 an additional channel 8 for the passage of the gas mixture into the regeneration cavity 2. In front of the pipe 13 there is a chamber 6 with an inlet pipe 4. The chamber 6 is equipped with a device m of water removal 9. The outlet pipe 5 is connected with the cavity 2 through the Central channel 12.

Regenerative cartridge works as follows.

When the diver exhales, the gas mixture enters through the inlet pipe 4 into the chamber 6 (Figure 1, Figure 3). Due to the asymmetric shape of the chamber 6, the gas mixture circulates in the chamber 6 and passes at the wall of the chamber 14, which is made ribbed and made of a material with high thermal conductivity. Since this wall 14 is in contact with the aqueous medium, the gas mixture inside the chamber 6 is cooled and the moisture contained in the gas mixture condenses. Moisture released from the gas mixture, as well as trapped in the respiratory tract from the external environment, accumulates at the bottom of the chamber 6, from where it is removed by means of a water removal device 9. The liquid from the chamber 6 cannot enter the cavity 2 with the regenerating substance 3, because the channel 8 connecting the chamber 6 and the cavity 2 is located closer to the central axis of the cartridge and is formed by the molded nozzle 13 and the central channel 12. Through the channel 8, the gas mixture enters cavity 2, where its regeneration occurs. Next, the gas mixture enriched with oxygen enters the Central channel 12 and then through the outlet pipe 5 exits the cartridge.

Claims (6)

1. The regenerative cartridge of a diving breathing apparatus, comprising a housing with a cavity filled with a regenerating substance, an inlet pipe for the gas mixture exhaled by the diver to enter the cartridge, and an outlet pipe connected to the cavity outlet, characterized in that a chamber connected to one side is placed in front of the cavity with an inlet pipe, and on the other hand through a channel with the said cavity, the outer wall of the chamber is made of material with high thermal conductivity, while the said channel is located in Independent user-section chamber so that during operation of the cartridge from the chamber through the water channel from getting into the cavity with regenerating substance, and the chamber is provided with a water removal apparatus. 2. The regenerative cartridge according to claim 1, characterized in that the channel connecting the chamber to the cavity and the inlet pipe are arranged relative to each other with the possibility of passing the gas mixture exhaled by the diver in the chamber, mainly near the wall. 3. The regenerative cartridge according to claim 1, characterized in that the outer wall of said chamber is made of metal. 4. The regenerative cartridge according to claim 1, characterized in that the wall surface facing the environment of said chamber is made with a developed surface, in particular ribbed. 5. The regenerative cartridge according to claim 1, characterized in that the water removal device is made in the form of a drain valve. 6. The regenerative cartridge according to claim 1, characterized in that the water removal device is located in the lower part of the chamber.

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