US3049984A - Air curtains - Google Patents

Air curtains Download PDF

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Publication number
US3049984A
US3049984A US850557A US85055759A US3049984A US 3049984 A US3049984 A US 3049984A US 850557 A US850557 A US 850557A US 85055759 A US85055759 A US 85055759A US 3049984 A US3049984 A US 3049984A
Authority
US
United States
Prior art keywords
vanes
air
vane
guiding
air curtain
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
US850557A
Other languages
English (en)
Inventor
Boysen Arne
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.)
Svenska Flaktfabriken AB
Original Assignee
Svenska Flaktfabriken AB
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
Priority to NL110220D priority Critical patent/NL110220C/xx
Priority to DEA33051A priority patent/DE1160997B/de
Priority to FR807459A priority patent/FR1237580A/fr
Priority to GB34821/59A priority patent/GB861672A/en
Priority to CH7941559A priority patent/CH380338A/de
Application filed by Svenska Flaktfabriken AB filed Critical Svenska Flaktfabriken AB
Priority to US850557A priority patent/US3049984A/en
Application granted granted Critical
Publication of US3049984A publication Critical patent/US3049984A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F13/075—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser having parallel rods or lamellae directing the outflow, e.g. the rods or lamellae being individually adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1406—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1413—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using more than one tilting member, e.g. with several pivoting blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1486—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by bearings, pivots or hinges
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
    • F24F2013/1446—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with gearings

Definitions

  • the present invention relates to a method to secure the shielding effect of an air curtain between two spaces at occurring variations in pressure difference between said spaces, and is characterized in that the introduced air forming said air curtain is regulated in such a way that said curtain is deflected from its normal position towards that space where a relative pressure increase occurs and that at the same time the air quantity-while maintaining the ow velocity constant-is caused to increase in direct proportion to the extent of deviation of said air curtain from its normal position.
  • the invention further relates to a device for the performance of said method, consisting of an air supply duct, provided with one or more distributing slots having a length corresponding to the intended extension of said curtain.
  • Said device is characterized in that each of said slots is bounded by two rotatably journalled, inter-connected guiding vanes having -two alternately functioning turning centers and being so shaped that the free slot between said guiding vanes always will increase in the same ratio as the guiding vanes are turned to give the air curtain an oblique ilow direction.
  • the device may suitably be provided with maneuvering means for an automatic adjustment of the guiding vanes, said means being inuenced by the air pressures on different sides of the air curtain.
  • the device may have means for maintaining the pressure in the air supply duct at a const-ant value.
  • FIG. ⁇ l is a cross section of a passageway embodying an air curtain in accordance with the present invention
  • FIG. 2 is an enlarged fragmentary cross section of an air supply duct having regulating means in accordance with the present invention
  • FIG. 3 is a sectional view taken on the line 3 3 of FIG. 2;
  • FIG. 4 is a sectional view taken on the line 4 4 of FIG. 3;
  • FIG. 5 is a longitudinal sectional view taken intermediate a pair of guiding vanes.
  • FIGS. 6, 7, and 8 are diagrammatic views of the guiding vanes as shown in FIG. 2, showing the operation thereof.
  • a groove 6c is arranged in the guiding vane 6 for a stub shaft 6a iixed to the fastening means, which shaft slides in said groove when the vane is turned to the right.
  • 13 designates a spring, one end of which is fastened to said shaft and the other end of which is fastened to the guiding vane 6 (see FIG. 4).
  • the purpose of said spring is to prevent the stub shaft from sliding in the groove 6c when the guiding vane is turned to the left.
  • the guiding vane 7 is provided with similar elements, which in the drawing are designated 7b, ⁇ 12, 10, 7c and 14.
  • 15 tand 16 designate two sprocket wheels arranged at the ends of the guiding vanes, which sprockets are actuated by a rack gear 17.
  • This gear is by means of a rod 18 connected to a control means 19 which at occurring changes of the pressures sensed by devices 20 ⁇ and 211 will displace said rod in one or the other direction and thereat will adjust the guiding vanes for obtaining a ⁇ changed ilow direction for the air curtain in accordance with the invention.
  • Means of any desired type may be provided for maintaining the pressure in the duct 4 at a constant value.
  • Such means are well known in the art but for illustrative purposes there is shown a flo-w control device 22 which is capable of sensing the pressure of air entering the duct 4 and acting to control the effect of the air supply means (not shown).
  • the air ow passage between the vanes increases when the vanes are deflected from their normal position in which the air curtain is directed vertically downward.
  • FIG. 7 in the normal position of the vanes, there is a clearance designated W1 between the vanes.
  • Deflection of the air curtain to the left for example by displacement of the rack 17 to the right (see FIG. 2), causes the vane 6 to pivot on the stud 6a, the stud 6b moving in the slot 11.
  • the vane 7, on the other hand pivots on its stud 7b, the slot 7c moving over the pivot stud 7a so that the vanes 6 and 7 assume the position 6" and 7" as shown.
  • the sprockets or gears for one of the vanes are shown as being located on the ends of the vanes. They may be secured to the ends of the vanes in any of the many Ways in which artisans employ for securing parts together.
  • the body of the vane 6 is made of wood, wood screws may be employed for securing the gears to the vane; if the vane is made of sheet metal (as is very common in this art) the gears may he secured by sheet metal screws or by bolts; if the vane is made of solid metal (and it need not be, for it may as well be made light), the gears may be secured to the vane body by machine screws. In any case it is possible to use glue, solder, welding, or other appropriate means as are now so commonly employed.
  • the stub shafts 6b are provided on the ends of the vane and at the center of the gears and of the arcuate portions of the vane.
  • the stub shafts are rigidly secured either directly to the vane or to the gears, depending on which may he more convenient.
  • FIG. 4 shows this arrangement very clearly and it is equally apparent in FIG. 3.
  • the shape and support of the guiding vanes as wel-l as the adjusting means may be varied in a number of ways.
  • a method of securing improved shielding effect of an air curtain moving in a path between two spaces at different pressures upon variations in the pressure difference between said spaces comprising the steps of introducing air at constant pressure in the form of an air curtain transversely between said spaces, deecting said curtain from its normal path toward that space wherein the relative pressure increases, and maintaining the flow velocity in said air curtain constant while increasing the quantity of fiow in direct proportion to the extent of deflection of said air curtain from its normal position.
  • Apparatus for securing an improved air shielding eiect of an air curtain moving in a path transversely of the length of a passageway between two spaces at different pressures upon variations in the pressure difference between said spaces comprising in combination, an air supply duct having an air supply opening of a length corresponding to the width of said passageway, said opening being located above the passageway, a pair of air guiding vanes mounted in said opening in spaced-apart relationship, said vanes being of the same length as said opening, means sealing said vanes with the sides of the opening, leaving the space between the vanes open for the passage of air to form an air curtain transversely of said passageway, each of said vanes having a vane-carried stub shaft secured to each vane at each end, a gear on each vane concentric with the vane-carried shaft, a iixed anchorage support in the opening at each end of the vanes, an arcuate slot in the iixed supports for each vanecarried stub sha
  • Apparatus yas set forth in claim 2 which further includes means for operating said vanes in accordance with the pressure differential of the two spaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
US850557A 1958-10-14 1959-11-03 Air curtains Expired - Lifetime US3049984A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL110220D NL110220C (ja) 1958-10-14
DEA33051A DE1160997B (de) 1958-10-14 1959-10-14 Verfahren und Vorrichtung zur Sicherung der Abschirmwirkung eines Luftvorhanges zwischen zwei Raeumen
FR807459A FR1237580A (fr) 1958-10-14 1959-10-14 Procédé perfectionné pour obtenir l'effet de protection d'un rideau d'air entre deux espaces lorsqu'il se produit des changements dans la différence de pression entre ces deux espaces
GB34821/59A GB861672A (en) 1958-10-14 1959-10-14 Method of and means for securing the shielding effect of an air current between two spaces on pressure differences occurring between said spaces
CH7941559A CH380338A (de) 1958-10-14 1959-10-14 Verfahren zur Sicherung der Abschirmwirkung eines Luftvorhanges zwischen zwei Räumen bei Auftreten einer Druckdifferenz zwischen diesen Räumen und Einrichtung zur Ausführung des Verfahrens
US850557A US3049984A (en) 1958-10-14 1959-11-03 Air curtains

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE954458 1958-10-14
US850557A US3049984A (en) 1958-10-14 1959-11-03 Air curtains

Publications (1)

Publication Number Publication Date
US3049984A true US3049984A (en) 1962-08-21

Family

ID=26654906

Family Applications (1)

Application Number Title Priority Date Filing Date
US850557A Expired - Lifetime US3049984A (en) 1958-10-14 1959-11-03 Air curtains

Country Status (6)

Country Link
US (1) US3049984A (ja)
CH (1) CH380338A (ja)
DE (1) DE1160997B (ja)
FR (1) FR1237580A (ja)
GB (1) GB861672A (ja)
NL (1) NL110220C (ja)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797373A (en) * 1972-07-19 1974-03-19 Npi Corp Air curtain
US4074620A (en) * 1975-11-06 1978-02-21 Bror Ingvar Erling Jansson Device for preventing the flow of air through an opening between two rooms or spaces
US4077228A (en) * 1976-08-16 1978-03-07 Emhart Industries, Inc. Refrigerated display case
EP0866286A3 (de) * 1997-03-17 2000-05-31 TTL Tür + Torluftschleier Lufttechnische Geräte GmbH Luftauslass für Luftstrahle mit grosser Reichweite
US6375562B1 (en) * 1999-07-12 2002-04-23 Dorma Gmbh + Co. Kg Sliding door
US20040242146A1 (en) * 2001-10-17 2004-12-02 Robert Falk Sliding door device
US20060160484A1 (en) * 2003-07-11 2006-07-20 Robert Falk Door with integrated identification system in the air curtain device
US20070298703A1 (en) * 2006-06-23 2007-12-27 Chih-Feng Chen Insect proof wind generating device
DE102008042803B4 (de) 2008-10-13 2012-06-21 LGB Lufttechnische Anlagen und Gerätebau GmbH Vorrichtung zur Führung eines Luftstromes
US20140342649A1 (en) * 2011-12-06 2014-11-20 A.R.I.A. Engineering S.R.L. Method and an apparatus for creating an outdoor still-air environment, or an environment with controlled wind
US20150072609A1 (en) * 2012-03-29 2015-03-12 Howorth Air Technology Limited Clean air apparatus
US20150241075A1 (en) * 2014-01-31 2015-08-27 Thermoscreens Limited Air-curtain device
EP3064851A1 (en) * 2015-03-04 2016-09-07 Airmaster A/S A system for supplying air to a room
US20220186971A1 (en) * 2020-12-14 2022-06-16 Lg Electronics Inc. Hygiene management device for entrance hall

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH568532A5 (ja) * 1973-06-06 1975-10-31 Luwa Ag
DE2609030C3 (de) * 1976-03-05 1984-05-24 Fläkt AB, 13134 Nacka Vorrichtung zum Führen von aus einer luftdurchlässigen perforierten Fläche austretenden Luftströmen
CH651648A5 (de) * 1981-03-06 1985-09-30 Hess & Cie Pilgersteg Gitterfoermige zuluftauslassvorrichtung fuer die belueftung oder beheizung eines raumes.
DE19720912A1 (de) * 1997-05-17 1998-11-19 Fea Filter Und Entstaubungsanl Luftdurchströmbarer Hohlkörper
DE10158214B4 (de) * 2001-11-28 2005-11-10 Thyssenkrupp Hiserv Gmbh Gebäude mit einer Absaugvorrichtung zum Absaugen von Gasen, insbesondere zur Entrauchung im Brandfall

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US983877A (en) * 1910-02-02 1911-02-14 Henry H Cummings Air-screen.
US2082335A (en) * 1934-06-28 1937-06-01 Tuttle & Bailey Inc Control register for air conditioning apparatus
US2149976A (en) * 1935-05-08 1939-03-07 James D Mcknight Ventilation control
US2863373A (en) * 1954-10-29 1958-12-09 Sifrag Spezialappbau & Ingenie Device for producing a room-closing air curtain
US2935925A (en) * 1957-04-22 1960-05-10 D Ooge Leonard Airseal closure device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT194570B (de) * 1953-11-03 1958-01-10 Sifrag Spezialappbau & Ingenie Einrichtung zur Erzeugung eines raumabschließenden Luftvorhanges
CH338009A (de) * 1956-01-26 1959-04-30 Sulzer Ag Verfahren zur Kompensierung von Änderungen des Fremdlufteinflusses auf die Schleierströmung in einer Luftschleieranlage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US983877A (en) * 1910-02-02 1911-02-14 Henry H Cummings Air-screen.
US2082335A (en) * 1934-06-28 1937-06-01 Tuttle & Bailey Inc Control register for air conditioning apparatus
US2149976A (en) * 1935-05-08 1939-03-07 James D Mcknight Ventilation control
US2863373A (en) * 1954-10-29 1958-12-09 Sifrag Spezialappbau & Ingenie Device for producing a room-closing air curtain
US2935925A (en) * 1957-04-22 1960-05-10 D Ooge Leonard Airseal closure device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797373A (en) * 1972-07-19 1974-03-19 Npi Corp Air curtain
US4074620A (en) * 1975-11-06 1978-02-21 Bror Ingvar Erling Jansson Device for preventing the flow of air through an opening between two rooms or spaces
US4077228A (en) * 1976-08-16 1978-03-07 Emhart Industries, Inc. Refrigerated display case
EP0866286A3 (de) * 1997-03-17 2000-05-31 TTL Tür + Torluftschleier Lufttechnische Geräte GmbH Luftauslass für Luftstrahle mit grosser Reichweite
US6375562B1 (en) * 1999-07-12 2002-04-23 Dorma Gmbh + Co. Kg Sliding door
US20040242146A1 (en) * 2001-10-17 2004-12-02 Robert Falk Sliding door device
US7040978B2 (en) * 2001-10-17 2006-05-09 Robert Falk Sliding door device
US20060160484A1 (en) * 2003-07-11 2006-07-20 Robert Falk Door with integrated identification system in the air curtain device
US20070298703A1 (en) * 2006-06-23 2007-12-27 Chih-Feng Chen Insect proof wind generating device
DE102008042803B4 (de) 2008-10-13 2012-06-21 LGB Lufttechnische Anlagen und Gerätebau GmbH Vorrichtung zur Führung eines Luftstromes
DE102008042803C5 (de) * 2008-10-13 2018-01-11 LGB Lufttechnische Anlagen und Gerätebau GmbH Vorrichtung zur Führung eines Luftstromes
US20140342649A1 (en) * 2011-12-06 2014-11-20 A.R.I.A. Engineering S.R.L. Method and an apparatus for creating an outdoor still-air environment, or an environment with controlled wind
US20150072609A1 (en) * 2012-03-29 2015-03-12 Howorth Air Technology Limited Clean air apparatus
US10962246B2 (en) * 2012-03-29 2021-03-30 Howorth Air Technology Limited Clean air apparatus and method for discharging clean air towards a target clean area in the form of an air curtain
US20150241075A1 (en) * 2014-01-31 2015-08-27 Thermoscreens Limited Air-curtain device
EP3064851A1 (en) * 2015-03-04 2016-09-07 Airmaster A/S A system for supplying air to a room
WO2016139310A1 (en) * 2015-03-04 2016-09-09 Airmaster A/S A system for supplying air to a room
US20220186971A1 (en) * 2020-12-14 2022-06-16 Lg Electronics Inc. Hygiene management device for entrance hall

Also Published As

Publication number Publication date
GB861672A (en) 1961-02-22
CH380338A (de) 1964-07-31
FR1237580A (fr) 1960-07-29
DE1160997B (de) 1964-01-09
NL110220C (ja) 1900-01-01

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