EP0582612B1 - Systeme de canalisation de l'air pour masque respiratoire de protection et masque respiratoire de protection pourvu d'un tel systeme - Google Patents

Systeme de canalisation de l'air pour masque respiratoire de protection et masque respiratoire de protection pourvu d'un tel systeme Download PDF

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Publication number
EP0582612B1
EP0582612B1 EP92909237A EP92909237A EP0582612B1 EP 0582612 B1 EP0582612 B1 EP 0582612B1 EP 92909237 A EP92909237 A EP 92909237A EP 92909237 A EP92909237 A EP 92909237A EP 0582612 B1 EP0582612 B1 EP 0582612B1
Authority
EP
European Patent Office
Prior art keywords
air
respirator
frame
section
exhalation
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.)
Expired - Lifetime
Application number
EP92909237A
Other languages
German (de)
English (en)
Other versions
EP0582612A1 (fr
Inventor
Hannu Inkinen
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.)
AIR-ACE Oy
Air Ace Oy
Original Assignee
AIR-ACE Oy
Air Ace Oy
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 AIR-ACE Oy, Air Ace Oy filed Critical AIR-ACE Oy
Publication of EP0582612A1 publication Critical patent/EP0582612A1/fr
Application granted granted Critical
Publication of EP0582612B1 publication Critical patent/EP0582612B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A62B9/003—Means for influencing the temperature or humidity of the breathing gas
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • A62B18/025—Halfmasks

Definitions

  • the invention relates to a protective respirator with an air guidance system, the respirator comprising a face sealing section made of a rubber type substance, inhalation and exhalation valves connected to a frame, the frame being connected to the sealing section, and a filter attached to the frame through which the air to be purified is breathed.
  • the invention relates further to a method to guide the air in a protective respirator with an air guidance system, the respirator comprising a face sealing section made of a rubber type substance, inhalation and exhalation valves connected to a frame, the frame being connected to the sealing section, and a filter attached on the frame through which the air to be purified is breathed, the method including the steps of guiding the air through the filter, through the inhalation valve into the face sealing section for breathing, and guiding the breathed air through the exhalation valve outside.
  • respirator is known from FI-B-69757, providing an enclosure between a frame and a face sealing section.
  • a gas mask particularly suitable for cold temperatures, is known from US-A-2,741,246.
  • the gas mask comprises a heat exchange sheet provided between a face sealing section and an outer layer of the mask.
  • Protective respirators have conventionally been used mainly in industrial work and agricultural work in order to protect the user against harmful dust and gases.
  • Protective respirators are being used increasingly in the home as well; e.g. in order to avoid pollen allergy.
  • the following is a description of some alternative solutions concerning the valve arrangement of protective respirators.
  • the exhalation valve of a filter bridge type of a half mask is located at an angle in the upper part of the mask's visor to enable the exhaled air to exit.
  • the exhalation valve and the inhalation valve have been located concentrically in the face section of the respirator's fore part. The exhalation air is conveyed directly into the surrounding air from the face section.
  • a common shortcoming in protective respirators is that the exhalation air leaves the respirator too close to the inhalation inlet. This leads to the risk that the carbon dioxide concentration of the air breathed in may rise to an excessive level. High carbon dioxide levels causes headache, fatigue, and even loss of consciousness in extreme cases. According to the authorities, a carbon dioxide concentration limit of ca. 1 % is still safe when breathing in.
  • a shortcoming in several currently available masks that reduces work safety and wearing comfort is that the user's spectacles and protective goggles tend to fog up because of the warm and moist exhalation air. This is generally due to the exhalation air having the possibility of being guided unobstructed from the exhalation valve directly onto the user's spectacles or goggles.
  • a protective respirator mentioned at the outset, in that an enclosure is provided between the frame and the face sealing section, into which the air that passes through the exhalation valve is guided.
  • the above object is further solved by the method to guide the air in a protective respirator, mentioned at the outset, wherein the method includes the further step of guiding the air coming from the exhalation valve into an enclosure between the frame and the face sealing section.
  • the foremost advantage of the invention may be seen in that the formation of condensated water on the sealing surfaces of the face section is markedly reduced. This is accompanied by the warming up of the inhalation air and the respirator is safe to use even in sub-zero temperatures. Further, the mixing up of exhalation air into the inhalation air is minimised.
  • the air leaked by the exhalation valve is noticeably cleaner than the air surrounding the respirator, because the unclean surrounding air is not in the immediate vicinity of the exhalation valve, the leaked air has, in the main, composed of air that has been filtered once and then exhaled.
  • air containing particles as impurities is cleaner between the frame and face sealing section than on the outer surface of the mask, because the exhaled air stays around the exhalation valve in between the user's breaths and the pressure of the exhaled air forces unclean air away through the valve opening.
  • Figure 1 is an exploded presentation of the protective respirator.
  • Figure 2 shows the protective respirator from above and partially as a sectional presentation.
  • Figure 3 shows a side view of the protective respirator and partly as a sectional view along the line C-C in fig. 2.
  • FIGS 4a and 4b show two different implementations of the heat exchange surfaces.
  • Figure 5 is an isometric assembly drawing of a respirator in accordance with the invention.
  • Fig. 1 is a schematic exploded presentation of a protective respirator in accordance with the invention.
  • the respirator is composed of a lattice section 1 protecting the filter, a filter 2, a frame section 3 made up of supporting ribbing with a hole for the inhalation air, a valve frame 4 onto which the inhalation and exhalation valves are mounted, and a face sealing section 7 that is connected to a valve frame 4 by means of the respirator's mounting straps, these straps not being shown in fig. 1.
  • the top of the respirator's frame section 3 houses an air guidance plate 8.
  • Fig. 2 shows the protective respirator as seen from above and partially as a sectional view of it.
  • the mounting straps 9 are indicated by dashed lines in the drawing.
  • Fig. 3 shows the assembled mask placed over the user's face:
  • the presentation is a side view partially as a sectional presentation along the line C-C shown in fig. 2.
  • the drawing shows how the warm exhalation air is guided through the exhalation valve 6 through the frame section 3 and into the air enclosure 11 of the face sealing section 7. Due to convectional force, the warm exhalation air rises upward in the air enclosure 11 until it meets the air guidance plate 8.
  • the air guidance plate 8 guides most of the warm air to the rear and up toward the ears of the person wearing the protective respirator.
  • the number 16 indicates a removable protective visor.
  • the warm exhalation air in the air enclosure maintains the temperature of the face sealing section's outside surface above the dewpoint temperature and thereby the formation of condensated water on the inner surfaces of the face sealing section is significantly reduced.
  • the warm exhalation air in the air enclosure also warms up the heat exchange surface 12 forming the rear surface of the frame section 3. Heat is transmitted by conduction from the heat exchange surface to the supporting ribbing 13. On being warmed up, the supporting ribbing releases heat into the filtered inhalation air flowing between the ribbing. Thus, the temperature of the inhalation air is not dangerously cold even for persons afflicted by asthma.
  • Figs. 4a and 4b shows another possible solution for the structure of the heat exchange surface 12.
  • the ribbing 13 is thus formed that the frame section 3 is essentially of the same thickness at the points of the ribs as it is next to the air transfer channels 10.
  • the said construction facilitates a more efficient exchange of heat because of the greater surface area and more even thickness of the frame section.
  • Fig. 5 shows a fastening stud 15 by means of which the lattice section 1 is fastened onto the frame section.
  • the pressure equalising apertures 14 can be executed, for example, into the section of the lattice 1 curving underneath the respirator. When this is done, the said pressure equalising apertures converge with the apertures made into the corresponding parts of the frame section 3 when the respirator is assembled.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Ventilation (AREA)
  • Outer Garments And Coats (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Confectionery (AREA)

Claims (11)

  1. Respirateur de protection avec un système de guidage de l'air, le respirateur comprenant :
    - une partie de recouvrement étanche du visage (7) constituée d'une matière de type caoutchouc;
    - des vannes d'inspiration et d'expiration (5, 6) reliées à une monture de vanne (4), la monture (4) étant reliée à la partie de recouvrement étanche (7); et
    - un filtre (2) fixé sur une partie de monture (3) à travers lequel l'air à purifier est respiré,
    caractérisé par une enceinte (11) entre la partie de monture (3) et la partie de recouvrement étanche du visage (7), dans laquelle l'air qui passe à travers la vanne d'expiration (6) est guidé.
  2. Respirateur selon la revendication 1, caractérisé en ce que la partie de dessus de la partie de monture (3) contient une plaque de guidage de l'air (8) qui s'adapte aux contours du visage de l'utilisateur et est essentiellement orientée à partir de la monture (3,4) en direction du visage de l'utilisateur du respirateur.
  3. Respirateur selon la revendication 1 ou 2, caractérisé en ce que l'air d'expiration est guidé de telle sorte qu'il réchauffe une surface d'échange de chaleur (12) de la partie de monture (3) et des nervures d'échanges de chaleur (13) sur cette dernière, à partir desquelles la chaleur est évacuée dans l'air d'inspiration.
  4. Respirateur selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'air d'expiration est guidé de telle sorte qu'il réchauffe la surface extérieure de la partie de recouvrement (7), maintenant sa température intérieure à une valeur supérieure au point de rosée et évitant ainsi la formation d'eau condensée à l'intérieur de la partie de recouvrement étanche du visage (7).
  5. Respirateur selon la revendication 3 ou 4, caractérisé en ce que des rainures ou des cavités suivant l'orientation des rainures d'échange de chaleur (13) sont ménagées dans les nervures.
  6. Respirateur selon les revendications 3 à 5, caractérisé en ce que l'air d'expiration est guidé de telle sorte qu'il sorte du respirateur sensiblement dans le sens d'une surface de filtre, la surface d'échange de chaleur (12) de la partie de monture (3) et la plaque de guidage (8) guidant l'écoulement de l'air d'expiration.
  7. Respirateur selon l'une quelconque des revendications 3 à 8, caractérisé en ce que la surface d'échange de chaleur (12) constituant l'autre paroi de l'enceinte (11) est reliée aux nervures d'échange de chaleur (13) formant une pièce contigüe.
  8. Respirateur selon la revendication 7, caractérisé en ce que le côté (12) de la surface d'échange de chaleur faisant face à l'enceinte (11) est constitué de rainures longitudinales et/ou de cavités s'ouvrant en direction de l'enceinte (11).
  9. Respirateur selon la revendication 8, caractérisé en ce que des ouvertures égalisant la pression (14) ont été ménagées dans la partie de monture (3) et un treillis (1) à l'extérieur et/ou au-dessous de la vanne d'expiration (6).
  10. Respirateur selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'une visière de protection amovible (16) est fixée à la partie de monture (3).
  11. Procédé pour guider l'air dans un respirateur de protection avec un système de guidage de l'air, le respirateur comprenant
    - une partie de recouvrement étanche du visage (7) constituée d'une matière de type caoutchouc;
    - des vannes d'aspiration et d'expiration (5,6) reliées à une monture de vanne (4), la monture (4) étant reliée à la partie de recouvrement (7) et
    - un filtre (2) fixé sur une partie de monture (3) à travers lequel l'air à purifier est respiré,
    le procédé comprenant les étapes consistant à guider l'air à travers le filtre (2), à travers la vanne d'inspiration (5) dans la partie de recouvrement étanche du visage (7) pour respirer et guider l'air respiré à travers l'extérieur de la vanne d'expiration (6), caractérisé par l'étape supplémentaire consistant à guider l'air provenant de la vanne d'expiration (6) dans une enceinte (11) entre la partie de monture (3) et la partie de recouvrement étanche du visage (7).
EP92909237A 1991-05-02 1992-04-30 Systeme de canalisation de l'air pour masque respiratoire de protection et masque respiratoire de protection pourvu d'un tel systeme Expired - Lifetime EP0582612B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI912138 1991-05-02
FI912138A FI87047C (fi) 1991-05-02 1991-05-02 Luftvaexlingssystem foer andningsskydd och andningsskydd
PCT/FI1992/000137 WO1992019322A1 (fr) 1991-05-02 1992-04-30 Systeme de canalisation de l'air pour masque respiratoire de protection et masque respiratoire de protection pourvu d'un tel systeme

Publications (2)

Publication Number Publication Date
EP0582612A1 EP0582612A1 (fr) 1994-02-16
EP0582612B1 true EP0582612B1 (fr) 1996-12-11

Family

ID=8532436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92909237A Expired - Lifetime EP0582612B1 (fr) 1991-05-02 1992-04-30 Systeme de canalisation de l'air pour masque respiratoire de protection et masque respiratoire de protection pourvu d'un tel systeme

Country Status (8)

Country Link
EP (1) EP0582612B1 (fr)
JP (1) JP3438073B2 (fr)
AT (1) ATE146089T1 (fr)
AU (1) AU1655992A (fr)
CA (1) CA2102296C (fr)
DE (1) DE69215868T2 (fr)
FI (1) FI87047C (fr)
WO (1) WO1992019322A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2825758B2 (ja) * 1994-06-03 1998-11-18 クリンテック株式会社 鼻部保温マスク
DE19534985C2 (de) * 1995-09-21 1998-02-12 Auergesellschaft Gmbh Atemschutzmaske
EP0776679B1 (fr) * 1995-12-01 2002-04-10 Ikari Corporation Masque pour le maintien de chaleur à la région nasale
US5924420A (en) * 1996-09-24 1999-07-20 Minnesota Mining And Manufacturing Company Full face respirator mask having integral connectors disposed in lens area
US6279570B1 (en) * 1999-03-02 2001-08-28 3M Innovative Properties Company Filter support, assembly and system
ES2157775B1 (es) * 1999-03-29 2002-02-16 Gonzalez Andres Sanchez Mascarilla recuperadora del calor corporal y templadora del aire a respirar.
GB0112958D0 (en) * 2001-05-29 2001-07-18 F X K Patents Ltd A pressure regulator
FI20011992A (fi) 2001-10-12 2003-04-13 Euromaski Oy Suojalaite
GB0411759D0 (en) * 2004-05-26 2004-06-30 Bu Innovations Ltd Safety mask
CN104366755B (zh) * 2014-11-04 2017-01-18 朱其厚 主动送风防护口罩
CN111315448B (zh) * 2017-09-01 2022-02-15 皇家飞利浦有限公司 呼吸面罩
EP3479876A1 (fr) * 2017-11-02 2019-05-08 Koninklijke Philips N.V. Masque respiratoire
CN207462475U (zh) * 2017-09-01 2018-06-08 皇家飞利浦有限公司 空气污染物的防护面罩

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741246A (en) * 1954-12-17 1956-04-10 George R Litchfield Gas masks
FI69757C (fi) * 1983-08-23 1986-05-26 Kauko Kullervo Haemaelaeinen Halvmask foersedd med en filterbrygga
EP0258508B1 (fr) * 1986-09-05 1991-03-27 Siebe North, Inc. Masque respiratoire à élément de filtrage interchangeable
WO1991018647A1 (fr) * 1990-06-04 1991-12-12 Air-Ace Oy Masque respiratoire

Also Published As

Publication number Publication date
EP0582612A1 (fr) 1994-02-16
WO1992019322A1 (fr) 1992-11-12
JPH06506845A (ja) 1994-08-04
FI87047B (fi) 1992-08-14
DE69215868D1 (de) 1997-01-23
FI912138A (fi) 1992-08-14
FI912138A0 (fi) 1991-05-02
CA2102296A1 (fr) 1992-11-03
ATE146089T1 (de) 1996-12-15
AU1655992A (en) 1992-12-21
CA2102296C (fr) 2004-08-10
FI87047C (fi) 1992-11-25
DE69215868T2 (de) 1997-07-10
JP3438073B2 (ja) 2003-08-18

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