US3803995A - Arrangement for maintaining a ventilated zone within a part of a room partitioned by an air curtain - Google Patents

Arrangement for maintaining a ventilated zone within a part of a room partitioned by an air curtain Download PDF

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Publication number
US3803995A
US3803995A US00175198A US17519871A US3803995A US 3803995 A US3803995 A US 3803995A US 00175198 A US00175198 A US 00175198A US 17519871 A US17519871 A US 17519871A US 3803995 A US3803995 A US 3803995A
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United States
Prior art keywords
air
room
air curtain
curtain
arrangement
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Expired - Lifetime
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US00175198A
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English (en)
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C Allander
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A61G13/108—Means providing sterile air at a surgical operation table or area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • F24F2009/007—Use of air currents for screening, e.g. air curtains using more than one jet or band in the air curtain

Definitions

  • ABSTRACT The invention relates to an arrangement for maintaining a ventilated zone within a part of a room, e.g. an operating room, partitioned by an air curtain or screen.
  • a device for supplying ventilating air inside the partioned part of the room there are outer air inlets provided in the part of the room outside of the air curtain, said outer inlets being designed to supply air to the room in replacement for the air sucked from outside said curtain into same.
  • the present invention relates to an arrangement for maintaining a ventilated zone within a part of a room partitioned by an air curtain or screen.
  • the problem on which the present invention is based is to provide an arrangement of the type mentioned in the introduction which not only preventsair flow and the transport of particles in through the air curtain to the ventilated zone, but also equally effectively prevents air flow in the opposite direction.
  • this problem is solved in an exceedingly effective manner whereby,in addition to having a device for supplying in a known way ventilating air within the partitioned part of the room, there are outer air inlets provided in the part of the room outside the air curtain. These outer air inlets are designed to convey air to the room in replacement for the air which is sucked from outside the air curtain into same.
  • the essential difference between the arrangement according to the present invention and previously known arrangements is that the latter arrangements merely controlled and determined the supply of air required to produce the air curtain (the curtain air) and the ventilating air supplied inside the air seal, whereas the arrangement according to the invention also controls and determines the air supply in the area outside the air curtain.
  • the air curtain partitions off only a ventilated zone within a part ofa room, e.g. a zone around an operating table, it has been shown to be particularly advantageous to design the air exhausting device with air exhaust openings in the floor instead of along the foot of the walls in the room.
  • the arrangement is then characterized by providing the room, preferably at the floor, with exhaust openings adapted to suck out an amount of air per unit of time which is at least equal to the amount of ventilating air supplied per unit of time, increased by the amounts of curtain air supplied and outer replacement air.
  • FIG. 1 shows a vertical section through a room equipped with an arrangnce that maintains a ventilated zone through partitioning by means of an air curtain.
  • FIG. 2 shows a horizontal section through the air supply means included in FIG. 1 on the line 11- thereof.
  • FIG. I shows a vertical section through a room 3 which is provided with anarrangement according to the invention.
  • the arrangement maintains a ventilated zone 1 within a part of the room 3 partitioned by an air curtain 2.
  • An operating table 7 is placed in the ventilated zone 1.
  • the air supply means are arranged on the ceiling in the room and consist of three main parts; an outer, rectangular, air channel or duct 8 for supplying outer replacement air and, within said channel, an inner air channel or duct 9 which is similarly shaped and congruent with the outer channel and is responsible for supplying curtain air.
  • a box-shaped device 4 for supplying ventilating air within the air curtain 2.
  • the bottoms of the channels 8 and 9 are provided with slotted air inlets and 10 respectively and the bottom of the box-shaped device or box 4 is provided with a plurality of openings 11 for the ventilating air. Furthermore, the channels 8,9 and the box 4 are each provided with one or more ducts 12,13 and 14 respectively which are connected to an air supply stream (not shown in detail on the drawing).
  • the operating table 7 is placed on the floor 15 which is provided with air exhaust openings 6. These openings 6 may consist of e.g. one row or several parallel rows of holes or slots which form a rectangular pattern in the floor 15. If there is an air curtain 2, as shown in FIG. 1, having essentially vertical sides, it is preferable to arrange the openings 6 directly under the slotted air inlets 10. However, if the air curtain diverges or converges towards the floor, the openings will be placed further out towards the rooms walls, or respectively nearer the operating table 7.
  • the invention is in no way restricted to an arrangement having rectangularly extending air ducts 8 and 9.
  • the ducts or channels may instead be shaped as the sides of a triangle, square or any other suitable polygon; they may also form a circle, an ellipse or have another closed shape.
  • the box 4 will have a shape which allows it to take up the space within the duct 9. It is clear here that the openings 6 are so placed in the floor 15 that, together with the air inlet 10 of the duct 9, they give the air curtain the desired shape.
  • the amount of ventilating air supplied in the part of the room inside of the air curtain will consequently be one-fourth Q, per side of the channel.
  • the ventilating air Q, supplied within the air curtain 2 may be assumed to be distributed evenly over the inside of the air curtain i.e. the air curtain, per side, will be supplied from within with one-fourth Q,..
  • a flow equilibrium will consequently occur between the amount of air coming in from within one-fourth Q, and the amount of air coming from without one-fourth Q which, according to the above, is equal to one-fourth 0,, .since Q, Q,,.
  • the amount of air for each side part of the air curtain and sucked out through the openings 6 shall be Qout 5 1 Q., 5 Q, A Q or, in other words, Q /2 Q, Q,.
  • Arrangement for maintaining a ventilated zone in a part of a room partitioned by an air curtain comprising in combination means establishing an air curtain in the room, a device for supplying ventilating air within said partitioned part, and outer air inlets in the part of the room outside of the air curtain, said outer inlets supplying air to said room to replace the air which is sucked from the outside of the air curtain into same, said means establishing an air curtain comprising air inlet means extending in a first closed horizontal path about the top of the room and spaced inwardly from the side walls of the room, and air exhaust openings beneath the last-named air inlet means and extending in a closed horizontal path about the floor of the room and spaced inwardly from the side walls of the room, said outer air inlets extending in a second closed path symmetrically about said first closed path.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Surgery (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
US00175198A 1970-09-04 1971-08-26 Arrangement for maintaining a ventilated zone within a part of a room partitioned by an air curtain Expired - Lifetime US3803995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE12068/70A SE345318B (nl) 1970-09-04 1970-09-04

Publications (1)

Publication Number Publication Date
US3803995A true US3803995A (en) 1974-04-16

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US00175198A Expired - Lifetime US3803995A (en) 1970-09-04 1971-08-26 Arrangement for maintaining a ventilated zone within a part of a room partitioned by an air curtain

Country Status (7)

Country Link
US (1) US3803995A (nl)
AU (1) AU461576B2 (nl)
CA (1) CA942572A (nl)
DE (1) DE2142795A1 (nl)
FR (1) FR2107262A5 (nl)
GB (1) GB1363903A (nl)
SE (1) SE345318B (nl)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009647A (en) * 1974-04-26 1977-03-01 Howorth Air Engineering Limited Clean air zone for surgical purposes
US4094232A (en) * 1975-04-16 1978-06-13 Howorth Air Engineering Limited Clean air zone
US4137831A (en) * 1976-05-08 1979-02-06 Howorth Air Engineering Limited Clean air zone
US4140105A (en) * 1973-12-04 1979-02-20 Zinon Duvlis Gas curtain for shielding person on an operating table
US4253384A (en) * 1977-04-18 1981-03-03 Schmidt Reuter Ingenieurgesellschaft Mbh & Co. Kg Ventilating and air conditioning arrangement
DE3240842A1 (de) * 1982-11-05 1984-05-10 Rheinhold & Mahla GmbH, 8000 München Verfahren und vorrichtung zum einleiten grosser mengen zuluft in die raumluft
US4606259A (en) * 1984-08-07 1986-08-19 Flakt Aktiebolag Air curtain
US5512017A (en) * 1994-11-23 1996-04-30 Durr Industries, Inc. Paint spray booth and supply plenum arrangement
US6210267B1 (en) 1998-02-27 2001-04-03 Gaming Edge Products, L.L.C. Apparatus and method for use of an air rail
US6565035B1 (en) 1999-11-11 2003-05-20 The Boeing Company Apparatus and method for forming an air curtain for use with an aircraft
US6626971B1 (en) * 1998-09-15 2003-09-30 Siemens Axiva Gmbh & Co. Kg Method and device for protecting persons and/or products from air-borne particles
US20040242955A1 (en) * 2003-03-26 2004-12-02 Jochim Koch Hoodless incubator
US20100120349A1 (en) * 2008-10-31 2010-05-13 Airsonett Ab Surgical theater ventilating devices and methods
US20100291859A1 (en) * 2007-05-03 2010-11-18 Dan Allan Robert Kristensson Ventilating device for providing a zone of clean air.
CN102463230A (zh) * 2010-11-10 2012-05-23 鸿富锦精密工业（深圳）有限公司 集装箱数据中心及其除尘装置
US11408170B2 (en) * 2019-02-06 2022-08-09 Flexible OR Solutions LLC Universal pre-fabricated operating room ceiling system
US12016802B2 (en) 2019-10-22 2024-06-25 Aerobiotix. Llc Air treatment system for operating or patient rooms

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE397925B (sv) * 1974-09-19 1977-11-28 Svenska Flaektfabriken Ab Fergsprutbox och sett att ventilera densamma
US3998142A (en) * 1975-07-03 1976-12-21 Sterilaire Medical, Inc. Air circulating system for ultra clean areas
DE2609030C3 (de) * 1976-03-05 1984-05-24 Fläkt AB, 13134 Nacka Vorrichtung zum Führen von aus einer luftdurchlässigen perforierten Fläche austretenden Luftströmen
FR2968384B1 (fr) * 2010-12-01 2013-12-27 Robert Guetron Dispositif de separation fluidique de 2 regions
WO2013128083A1 (fr) * 2012-02-28 2013-09-06 Robert Guetron Dispositif de séparation fluidique de deux régions

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2794325A (en) * 1956-03-13 1957-06-04 Gen Motors Corp Refrigerated display case
US3143952A (en) * 1960-08-24 1964-08-11 Dualjet Corp Method and apparatus for conditioning gas
US3207056A (en) * 1963-02-05 1965-09-21 Dravo Corp Apparatus for shielding door openings by means of air
US3380369A (en) * 1965-02-23 1968-04-30 Allander Claes Gustaf System for ventilating clean rooms
US3528258A (en) * 1968-10-08 1970-09-15 Emhart Corp Refrigerated display case
US3625133A (en) * 1969-01-13 1971-12-07 Sanko Air Plant Air-curtaining apparatus for forming an internal-isolated zone

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2794325A (en) * 1956-03-13 1957-06-04 Gen Motors Corp Refrigerated display case
US3143952A (en) * 1960-08-24 1964-08-11 Dualjet Corp Method and apparatus for conditioning gas
US3207056A (en) * 1963-02-05 1965-09-21 Dravo Corp Apparatus for shielding door openings by means of air
US3380369A (en) * 1965-02-23 1968-04-30 Allander Claes Gustaf System for ventilating clean rooms
US3528258A (en) * 1968-10-08 1970-09-15 Emhart Corp Refrigerated display case
US3625133A (en) * 1969-01-13 1971-12-07 Sanko Air Plant Air-curtaining apparatus for forming an internal-isolated zone

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Abel & Allander, Some Aspects On Ventilating Clean Rooms. *
Olander et al., Study Concerning the Possibilities of Obtaining Dual Isolation Using Thin Air Curtains, May, 1971. *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140105A (en) * 1973-12-04 1979-02-20 Zinon Duvlis Gas curtain for shielding person on an operating table
US4009647A (en) * 1974-04-26 1977-03-01 Howorth Air Engineering Limited Clean air zone for surgical purposes
US4094232A (en) * 1975-04-16 1978-06-13 Howorth Air Engineering Limited Clean air zone
US4137831A (en) * 1976-05-08 1979-02-06 Howorth Air Engineering Limited Clean air zone
US4253384A (en) * 1977-04-18 1981-03-03 Schmidt Reuter Ingenieurgesellschaft Mbh & Co. Kg Ventilating and air conditioning arrangement
DE3240842A1 (de) * 1982-11-05 1984-05-10 Rheinhold & Mahla GmbH, 8000 München Verfahren und vorrichtung zum einleiten grosser mengen zuluft in die raumluft
US4606259A (en) * 1984-08-07 1986-08-19 Flakt Aktiebolag Air curtain
US5512017A (en) * 1994-11-23 1996-04-30 Durr Industries, Inc. Paint spray booth and supply plenum arrangement
US6210267B1 (en) 1998-02-27 2001-04-03 Gaming Edge Products, L.L.C. Apparatus and method for use of an air rail
US6626971B1 (en) * 1998-09-15 2003-09-30 Siemens Axiva Gmbh & Co. Kg Method and device for protecting persons and/or products from air-borne particles
US6565035B1 (en) 1999-11-11 2003-05-20 The Boeing Company Apparatus and method for forming an air curtain for use with an aircraft
US20040242955A1 (en) * 2003-03-26 2004-12-02 Jochim Koch Hoodless incubator
US6926664B2 (en) * 2003-03-26 2005-08-09 Dräger Medical AG & Co. KGaA Hoodless incubator
US20100291859A1 (en) * 2007-05-03 2010-11-18 Dan Allan Robert Kristensson Ventilating device for providing a zone of clean air.
US8308536B2 (en) * 2007-05-03 2012-11-13 Airsonett Operating Room Innovation Ab Ventilating device for providing a zone of clean air
US20100120349A1 (en) * 2008-10-31 2010-05-13 Airsonett Ab Surgical theater ventilating devices and methods
US20110294411A1 (en) * 2008-10-31 2011-12-01 Dan Kristensson Surgical Theatre Ventilating Devices and Methods
CN102463230A (zh) * 2010-11-10 2012-05-23 鸿富锦精密工业（深圳）有限公司 集装箱数据中心及其除尘装置
US11408170B2 (en) * 2019-02-06 2022-08-09 Flexible OR Solutions LLC Universal pre-fabricated operating room ceiling system
US12016802B2 (en) 2019-10-22 2024-06-25 Aerobiotix. Llc Air treatment system for operating or patient rooms

Also Published As

Publication number Publication date
AU461576B2 (en) 1975-05-29
AU3285471A (en) 1973-03-08
FR2107262A5 (nl) 1972-05-05
GB1363903A (en) 1974-08-21
CA942572A (en) 1974-02-26
DE2142795A1 (de) 1972-03-09
SE345318B (nl) 1972-05-23

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