FR2524809A1 - Underwater breathing equipment - has aqualung with heat exchanger to reduce losses - Google Patents

Underwater breathing equipment - has aqualung with heat exchanger to reduce losses Download PDF

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Publication number
FR2524809A1
FR2524809A1 FR8206166A FR8206166A FR2524809A1 FR 2524809 A1 FR2524809 A1 FR 2524809A1 FR 8206166 A FR8206166 A FR 8206166A FR 8206166 A FR8206166 A FR 8206166A FR 2524809 A1 FR2524809 A1 FR 2524809A1
Authority
FR
France
Prior art keywords
trap
thermal
circuit
gases
false lung
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8206166A
Other languages
French (fr)
Other versions
FR2524809B3 (en
Inventor
Yves Le Masson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MECA APPLIQUEES LAB
Original Assignee
MECA APPLIQUEES LAB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MECA APPLIQUEES LAB filed Critical MECA APPLIQUEES LAB
Priority to FR8206166A priority Critical patent/FR2524809B3/fr
Publication of FR2524809A1 publication Critical patent/FR2524809A1/en
Application granted granted Critical
Publication of FR2524809B3 publication Critical patent/FR2524809B3/fr
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63CLAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02Divers' equipment
    • B63C11/28Heating, e.g. of divers' suits, of breathing air
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00Component parts for respiratory or breathing apparatus
    • A62B9/003Means for influencing the temperature or humidity of the breathing gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63CLAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02Divers' equipment
    • B63C11/18Air supply
    • B63C11/22Air supply carried by diver
    • B63C11/24Air supply carried by diver in closed circulation

Abstract

<P> THE INVENTION CONCERNS A FALSE LUNG BREATHING CIRCUIT. </P> <P> THE CIRCUIT COMPRISES A THERMAL TRAP 7 AT THE INTAKE OF THE FALSE LUNG 3 TO TRAP A PART OF THE CALORIES OF EXPIRED GASES AND TO PROVIDE THESE CALORIES. INSPIRED GASES. </P> <P> THE INVENTION APPLIES IN PARTICULAR TO BREATHING CIRCUITS FOR SCUBA DIVING. </P>

Description

 The invention relates to respiratory circuits with false lungs used in particular in scuba diving.

 Scuba diving in deep water causes significant respiratory thermal losses of the order of a few tenths of a kilowatt, or for example of the order of 0.5 kW in water at 40C at a depth of 300 meters. These losses can endanger the life of the diver.

 The invention aims to reduce these losses.

 This is achieved, according to the invention, by arranging at the inlet of the false lung a thermal trap arranged at the inlet of the false lung to trap part of the calories of the gases exhaled during the expiratory phase and to supply these calories from gas inhaled into the false lung during the next inspiratory phase.

In the attached drawing
FIG. 7 is a schematic section of an example of a respiratory circuit according to the invention, and
- Figure 2 is a cross section of an example of a thermal trap.

 The respiratory circuit shown in FIG. 1 comprises a facial mask 1 (in a helmet 2) connected to a false lung 3 by a closed circuit comprising a conduit 4 for expired gases and a conduit 5 for inspired gases. The conduit 4 is connected to the false lung by means of an exothermic device for purifying the carbon dioxide from the exhaled gases, for example a cartridge 6 of soda lime. These provisions are known per se.

 The figure shows other optional details of the respiratory circuit which it is not useful to describe because they do not intervene for the understanding of the present invention.

 According to the invention, at the entrance to the false lung is disposed a thermal trap 7 which is located by its location on the path of the exhaled gases supplied to the false lung and, also, on that of the inspired gases taken from the false lung .

 Preferably, the conduits 4 and 5 are made of thermal insulating material.

 Thermal traps are known per se and used for example in the STERLING type thermal engine. A thermal trap essentially comprises materials licked by the gases and whose surfaces, conductivity and thermal capacity are capable of establishing a rapid thermal exchange between the gas and the materials of the trap.

 Figure 2 shows an example of a thermal trap.

 This trap is constituted by a stack of metal plates 8, alternating with corrugated gratings 9, in a housing 10.

 The temperature of the exhaled gases is approximately 330C before the purifier 6, approximately 450C at the outlet of the purifier (due to the exothermic reaction in the purifier) and approximately 100C at the entry into the false lung after crossing the trap 7.

 The false lung is a flexible pocket with a thin wall immersed in cold water: the temperature in the false lung is practically that of ambient water, around 40C for example.

 The gases inspired at this temperature are heated by passing through the thermal trap to a temperature of around 300C.

 The invention is not limited to the embodiment which has only been described by way of preferred example.

Claims (4)

1. Respiratory circuit with false lung, characterized in that it comprises a thermal trap disposed at the entrance of the false lung to trap part of the calories of the gases exhaled during the ia expiratory phase and to supply these calories to the gases inspired in the false lung during the next inspiratory phase.
2. Circuit according to claim 1 characterized in that it comprises, upstream of the thermal trap, a carbon dioxide gas purifier with exothermic reaction.
3. Circuit according to claim 1 or 2, characterized in that the thermal trap comprises a stack of metal plates alternating with corrugated grids.
4. Application of a respiratory circuit according to one of claims 1 to 3 to scuba diving.
FR8206166A 1982-04-08 1982-04-08 Expired FR2524809B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8206166A FR2524809B3 (en) 1982-04-08 1982-04-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8206166A FR2524809B3 (en) 1982-04-08 1982-04-08

Publications (2)

Publication Number Publication Date
FR2524809A1 true FR2524809A1 (en) 1983-10-14
FR2524809B3 FR2524809B3 (en) 1985-02-22

Family

ID=9272898

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8206166A Expired FR2524809B3 (en) 1982-04-08 1982-04-08

Country Status (1)

Country Link
FR (1) FR2524809B3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583706A1 (en) * 1985-06-25 1986-12-26 Lemasson Yves Improvements to artificial-lung breathing apparatuses for deep diving
WO2003097444A1 (en) 2002-05-22 2003-11-27 Bardot, Laurence Self-contained underwater breathing device with double gas stream circuit
GB2428011A (en) * 2005-07-05 2007-01-17 Clipper Data Ltd Cardon dioxide gas scrubber

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583706A1 (en) * 1985-06-25 1986-12-26 Lemasson Yves Improvements to artificial-lung breathing apparatuses for deep diving
WO2003097444A1 (en) 2002-05-22 2003-11-27 Bardot, Laurence Self-contained underwater breathing device with double gas stream circuit
FR2839944A1 (en) * 2002-05-22 2003-11-28 Olivier Bardot Self-contained underwater breathing device comprises breathing mouth, valves communicating with flexible lung, compressed gas tank with injection system into breathing circuit and exhaled gas filtering cartridges
GB2428011A (en) * 2005-07-05 2007-01-17 Clipper Data Ltd Cardon dioxide gas scrubber
GB2428011B (en) * 2005-07-05 2010-02-10 Clipper Data Ltd Cardon dioxide gas scrubber

Also Published As

Publication number Publication date
FR2524809B3 (en) 1985-02-22

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