EP0182581A2 - Appareil respiratoire en circuit fermé - Google Patents

Appareil respiratoire en circuit fermé Download PDF

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Publication number
EP0182581A2
EP0182581A2 EP85308211A EP85308211A EP0182581A2 EP 0182581 A2 EP0182581 A2 EP 0182581A2 EP 85308211 A EP85308211 A EP 85308211A EP 85308211 A EP85308211 A EP 85308211A EP 0182581 A2 EP0182581 A2 EP 0182581A2
Authority
EP
European Patent Office
Prior art keywords
carbon dioxide
closed circuit
counterlung
absorbing medium
dioxide absorbing
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.)
Withdrawn
Application number
EP85308211A
Other languages
German (de)
English (en)
Other versions
EP0182581A3 (fr
Inventor
Brian John Richards
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.)
LIFE SUPPORT ENGINEERING Ltd
Original Assignee
LIFE SUPPORT ENGINEERING Ltd
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 LIFE SUPPORT ENGINEERING Ltd filed Critical LIFE SUPPORT ENGINEERING Ltd
Publication of EP0182581A2 publication Critical patent/EP0182581A2/fr
Publication of EP0182581A3 publication Critical patent/EP0182581A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/10—Respiratory apparatus with filter elements

Definitions

  • This invention relates to closed circuit breathing apparatus incorporating means for removing carbon dioxide exhaled by the user.
  • a closed circuit breathing apparatus incorporating a carbon dioxide absorbing medium characterized in that a chemical heat exchanger in the form of activated carbon is located in a position relative to the carbon dioxide absorbing medium to reduce the temperature and relative humidity of the exhaled purified air resulting from the exothermic reaction thereof.
  • the activated carbon in the form of granules may be contained in a housing immediately adjacent to a housing containing the carbon dioxide absorbing medium in the form of soda lime whilst in a unidirectional type of closed circuit breathing apparatus, a housing containing soda lime can be sandwiched between two housings each containing activated carbon.
  • the pendulum type breathing apparatus shown in Figure 1 comprises a mouthpiece 1 connected via a breathing tube 2 to a canister 3 having therein a chemical heat exchanger 4 in the form of an activated carbon granule pack and a pack of soda lime 5, the canister 3 being attached to a counterlung 7 having an oxygen intake valve 8 therein.
  • Metal screens 6 covered with a fine filter paper are positioned one between the packs 4 and 5 and one at each end thereof to prevent dust from entering the breathing tube and counterlung.
  • Both packs 4 and 5 are preferably replaceable within the canister 3 or alternatively the canister itself may be replaced by a new one having fresh activated carbon granule and soda lime packs 4 and 5 respectively.
  • the activated carbon is a poor conductor of heat a large amount of heat and moisture is stored therein thus resulting in inhaled temperature levels significantly lower than those referred to above, for example between 42° and 48°C at a relative humidity of 70% or less. Such levels of temperature and relative humidity are very much more acceptable to the user.
  • the activated carbon may be in granular form but other forms such as extrudate are also suitable.
  • the chemical heat exchanger can also be used in a closed circuit breathing apparatus of the unidirectional type as shown in Figure 2.
  • This apparatus comprises a mouthpiece 1 coupled by breathing tubes 2 and 9 having non-return valves 22 and 21 to a canister 3 and a counterlung 7 respectivaly.
  • the canister 3 has a soda lime pack 5 sandwiched between two activated carbon granule packs 4 and a tube 10 connecting the canister 3 to the counterlung 7 which has an oxygen inlet valve 11 therein.
  • the breath exhaled through the mouthpiece 1 via the non-return valve 22 passes into the canister containing the activated carbon packs 4 and soda lime pack 5 into the tube 10 and thence to the counterlung 7 into which oxygen is admitted through the inlet valve 11, the mixture then passing through the breathing tube 9, non-return valve 21 and into the mouthpiece 1 on inhalation. Again heat and moisture are trapped in the activated carbon granule packs 4 to reduce the temperature and relative humidity of the inhaled air to acceptable levels.
  • the apparatus of Figure 2 may also incorporate metal screens 6 between the soda lime pack 5 and the activated carbon granule packs 4 and also at the inlet and outlet of the canister 3.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP85308211A 1984-11-13 1985-11-12 Appareil respiratoire en circuit fermé Withdrawn EP0182581A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8428689 1984-11-13
GB848428689A GB8428689D0 (en) 1984-11-13 1984-11-13 Closed circuit breathing apparatus

Publications (2)

Publication Number Publication Date
EP0182581A2 true EP0182581A2 (fr) 1986-05-28
EP0182581A3 EP0182581A3 (fr) 1989-02-22

Family

ID=10569689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85308211A Withdrawn EP0182581A3 (fr) 1984-11-13 1985-11-12 Appareil respiratoire en circuit fermé

Country Status (3)

Country Link
EP (1) EP0182581A3 (fr)
GB (1) GB8428689D0 (fr)
ZA (1) ZA858507B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213387A (en) * 1987-12-08 1989-08-16 Sabre Safety Ltd Closed circuit breathing apparatus
EP0372859A3 (fr) * 1988-12-01 1992-03-11 Avstar Aerospace Corporation Système respiratoire
WO1995031367A1 (fr) * 1994-05-14 1995-11-23 Prism Life Support Systems Limited Appareil respiratoire
EP0818217A1 (fr) * 1996-07-11 1998-01-14 Commeinhes Remco Appareil respiratoire à fonctionnement en circuit fermé
US5794616A (en) * 1993-11-17 1998-08-18 Cochran Consulting, Inc. Use of multiple gas blends with a dive computer
US5899204A (en) * 1993-11-17 1999-05-04 Cochran Consulting, Inc. Dive computer with wrist activation
US6003513A (en) * 1996-01-12 1999-12-21 Cochran Consulting Rebreather having counterlung and a stepper-motor controlled variable flow rate valve
GB2458854B (en) * 2007-03-09 2012-01-04 Strata Products Worldwide Llc Apparatus, system and method for cleaning air
CN111420313A (zh) * 2020-05-15 2020-07-17 上海孚邦实业有限公司 一种闭路式呼吸器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1695812U (de) * 1952-07-23 1955-03-31 Draegerwerk Ag Sauerstoffatemschutzgeraet.
FR1378659A (fr) * 1963-12-31 1964-11-13 Appareil respiratoire avec écoulement de l'air en circuit fermé
NL125975C (fr) * 1964-06-27
DE1957176U (de) * 1965-07-14 1967-03-16 Draegerwerk Ag Atemschutzgeraet.
SE318986B (fr) * 1967-03-14 1969-12-22 Sodialox Sa

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213387A (en) * 1987-12-08 1989-08-16 Sabre Safety Ltd Closed circuit breathing apparatus
EP0372859A3 (fr) * 1988-12-01 1992-03-11 Avstar Aerospace Corporation Système respiratoire
US5899204A (en) * 1993-11-17 1999-05-04 Cochran Consulting, Inc. Dive computer with wrist activation
US5794616A (en) * 1993-11-17 1998-08-18 Cochran Consulting, Inc. Use of multiple gas blends with a dive computer
WO1995031367A1 (fr) * 1994-05-14 1995-11-23 Prism Life Support Systems Limited Appareil respiratoire
US6003513A (en) * 1996-01-12 1999-12-21 Cochran Consulting Rebreather having counterlung and a stepper-motor controlled variable flow rate valve
EP0818217A1 (fr) * 1996-07-11 1998-01-14 Commeinhes Remco Appareil respiratoire à fonctionnement en circuit fermé
FR2750869A1 (fr) * 1996-07-11 1998-01-16 Commeinhes Remco Appareil respiratoire a fonctionnement en circuit ferme
GB2458854B (en) * 2007-03-09 2012-01-04 Strata Products Worldwide Llc Apparatus, system and method for cleaning air
GB2482454A (en) * 2007-03-09 2012-02-01 Strata Products Worldwide Llc Soda lime cartridge for a carbon dioxide scrubber
GB2482454B (en) * 2007-03-09 2012-05-16 Strata Products Worldwide Llc Apparatus, system and method for cleaning air
US8506681B2 (en) 2007-03-09 2013-08-13 Strata Products Worldwide, Llc Apparatus, system and method for cleaning air
US9162176B2 (en) 2007-03-09 2015-10-20 Strata Products Worldwide, Llc Apparatus and method for affecting air
CN111420313A (zh) * 2020-05-15 2020-07-17 上海孚邦实业有限公司 一种闭路式呼吸器

Also Published As

Publication number Publication date
GB8428689D0 (en) 1984-12-19
EP0182581A3 (fr) 1989-02-22
ZA858507B (en) 1986-06-25

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Inventor name: RICHARDS, BRIAN JOHN