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EP0645588B1 - Multiple gas curtain - Google Patents

Multiple gas curtain Download PDF

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Publication number
EP0645588B1
EP0645588B1 EP94202691A EP94202691A EP0645588B1 EP 0645588 B1 EP0645588 B1 EP 0645588B1 EP 94202691 A EP94202691 A EP 94202691A EP 94202691 A EP94202691 A EP 94202691A EP 0645588 B1 EP0645588 B1 EP 0645588B1
Authority
EP
European Patent Office
Prior art keywords
gas
parallel
flows
deep
atmosphere
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
EP94202691A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0645588A1 (en
Inventor
Petrus Josephus Joannes Hubertus Ligtenberg
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.)
Fh Biddle Bv
Original Assignee
Fh Biddle Bv
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 Fh Biddle Bv filed Critical Fh Biddle Bv
Publication of EP0645588A1 publication Critical patent/EP0645588A1/en
Application granted granted Critical
Publication of EP0645588B1 publication Critical patent/EP0645588B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/023—Air curtain closures
    • 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

  • the invention relates to a method for keeping separated the gas atmospheres on either side of an opening according to the introductory part of claim 1.
  • the invention has for its object to provide a method as set forth above, in which the separation of the two atmospheres on either side of an opening is further effectively improved.
  • the step of claim 2 is applied herein.
  • the outer gas flows form "protective" gas flows for the inner gas flow or flows. Turbulence and intermixing occur at the interfaces between the outer gas flows and the adjacent gas atmospheres, although this has no adverse effect on the energy content and composition of the inner gas flow or flows. This remains or these remain practically undisturbed.
  • Claim 4 gives an exceptionally suitable application of the method according to the invention. It is hereby possible to keep a deep-freeze area with a temperature in the order of magnitude of -20°C effectively separated from the outside atmosphere with a temperature for instance of +20°C. Due to the low temperature the air in the deep-freeze area contains only very little moisture in the absolute sense. By forming the at least one intermediate gas flow from heated air extracted from the deep-freeze area, this intermediate gas flow thus acquires a very low relative humidity. This prevents moisture from condensing in the interface between the outer gas flow adjoining the outside atmosphere and the inner gas flow adjacent thereto, so that mist formation is prevented in effective manner.
  • the invention likewise relates to and provides a gas curtain device as characterized in claim 6.
  • Favourable embodiments of the gas curtain device according to the invention are characterized in the further sub-claims.
  • the figure shows the application of the method by means of a device 4 according to the method at the location of a passage opening 3 between a deep-freeze area 1 and an outside atmosphere 2.
  • the gas atmosphere in deep-freeze area 1 is representatively an air atmosphere of -20°C.
  • the water content of the air is, in view of the low temperature, extremely low.
  • the gas atmosphere in the outside area 2 is the usual outside air atmosphere. In view of the high temperature the air contains a considerably larger quantity of water per unit of volume.
  • a gas curtain is formed, in this case an air curtain, which is composed of a number of parallel gas flows 5, 6 and 7 extending adjacently of each other.
  • These three parallel gas flows 5-7 are formed by means of a gas curtain device 4 which comprises gas transporting means 12-14 which debouch on the underside into elongate gas blow-out members (not further shown).
  • the gas transporting means 12, 13 and 14 are dimensioned and adjusted such that the gas flows 5, 6 and 7 have substantially the same speed and direction.
  • the gas flow 5 which borders on deep-freeze area 1 is formed from air extracted directly from deep-freeze area 1.
  • Gas flow 7 bordering on the atmosphere of the outside area 2 is likewise formed by air extracted directly from the outside area 2.
  • the inner gas flow 6 is formed in this embodiment from air which is likewise drawn from deep-freeze area 1 via the suction aperture 16.
  • Incorporated in the gas transporting means 13 are gas conditioning means which are formed here by heating means. The cold dry air from the deep-freeze area is heated by these heating means to a temperature intermediate that of the deep-freeze area 1 and the outside area 2. The heated air in gas flow 6 has a very low relative humidity.
  • the parallel gas flows 5, 6 and 7 have substantially the same speed and direction. Only a small turbulence and mixing hereby occurs at the position of the interfaces 9 and 10 between respectively gas flows 5 and 6 and gas flows 6 and 7.
  • the middle gas flow 6 retains its energy and composition practically down to the underside of opening 3, whereby an effective separation is obtained.
  • middle gas flow 6 consists in the manner described of conditioned dry air, mist formation is prevented.
  • a fork-lift truck through the passage opening 3 there occurs a stronger mixing of the different gas flows at the position of the interfaces 9 and 10, although transport of air out of the outside area 2 to deep-freeze area 1 is minimal, so that the said mist formation does not occur.
  • the method and device according to the invention are also suitable for other applications.
  • the invention can likewise be appropriately used in the usual application of air curtains for keeping separated the indoor and outdoor atmosphere of a building, as applied in typical manner for store premises and the like. The heat loss due to escape of warm air to the outside is very small with the invention.
  • the method and device are not limited to use with air as gas in the gas flows.
  • Other gas atmospheres can suitably be kept separated.
  • An example of an application can be in a production process in which particular operations must take place in particular gas atmospheres.
  • the different gas atmospheres for the different operational steps can be kept well separated with the method and device according to the invention.
  • Gas can optionally be drawn off on the side of the opening toward which the gas flows are directed.
  • the middle gas flow or flows can then be drawn off so that no or only little gas which is otherwise conditioned can enter the adjoining gas atmospheres.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Treating Waste Gases (AREA)
EP94202691A 1993-09-27 1994-09-19 Multiple gas curtain Expired - Lifetime EP0645588B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9301661 1993-09-27
NL9301661A NL9301661A (nl) 1993-09-27 1993-09-27 Meervoudig gasgordijn.

Publications (2)

Publication Number Publication Date
EP0645588A1 EP0645588A1 (en) 1995-03-29
EP0645588B1 true EP0645588B1 (en) 1999-12-15

Family

ID=19862929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94202691A Expired - Lifetime EP0645588B1 (en) 1993-09-27 1994-09-19 Multiple gas curtain

Country Status (6)

Country Link
EP (1) EP0645588B1 (nl)
AT (1) ATE187814T1 (nl)
DE (1) DE69422115T2 (nl)
ES (1) ES2139708T3 (nl)
GR (1) GR3032835T3 (nl)
NL (1) NL9301661A (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100894301B1 (ko) 2007-11-09 2009-04-24 김성호 상하 다단으로 적층 가능한 에어커튼 유닛
EP2218976A2 (en) 2009-01-21 2010-08-18 Flowair, Glogowski i Brzezinski sp.j. Air curtain with an auxiliary stream

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29818548U1 (de) 1998-10-17 1999-02-25 LKS Luft- u. Klimaservice Christian Israel, 09125 Chemnitz Luftschleiereinrichtung mit Luftführungsfrontplatte
DE10029543B4 (de) * 2000-06-15 2006-02-09 Christiani Gmbh Luftschleiergerät
DE20200246U1 (de) 2002-01-09 2002-04-18 LKS Israel GmbH Klimatechnisches Engineering, 09125 Chemnitz Anordnung zur Erzeugung eines Luftschottes
FR2847968B1 (fr) * 2002-11-29 2006-01-13 Jean Louis Bouillet Dispositif de maitrise du degre hygrometrique d'un local notamment un chai abritant des barriques d'elevage du vin
EP1462731B1 (de) 2003-03-24 2006-09-13 LWT Luftwandtechnologie GmbH Luftwand mit doppeltem Luftstrom für Toröffnung
DE10320490A1 (de) * 2003-03-25 2004-10-14 Kampmann Gmbh Vorrichtung zur Erzeugung eines Luftschleiers
NL1024346C2 (nl) 2003-09-23 2005-03-24 H M C Kruijssen Beheer B V Inrichting voor het genereren van een luchtgordijn.
DE102004001765A1 (de) * 2004-01-12 2005-08-04 Jochen Schanze Luftschleieranlage
EP2205906B1 (en) 2007-10-16 2012-08-01 Handelsmaatschappij Willy Deweerdt Bvba Device for generating an air wall
BE1018575A3 (fr) * 2008-09-18 2011-04-05 Damseaux Philippe Rideau d'air a recuperation de calories.
NL1039603C2 (nl) * 2012-05-15 2013-02-12 Bendex Airco Koeltechniek Koelsysteem, gebruik en werkwijze voor het conditioneren van verswaren.
JP6141038B2 (ja) * 2013-02-05 2017-06-07 三菱電機株式会社 車両用空気調和装置
JP6191485B2 (ja) * 2014-02-03 2017-09-06 富士電機株式会社 冷蔵倉庫
KR102190094B1 (ko) * 2019-11-21 2020-12-11 이재규 냉동 및 냉장 창고용 도어 연동형 에어커튼장치
CN111578437B (zh) * 2020-06-04 2024-12-31 广州市鑫湖能源科技有限公司 一种平行缝隙式风帘隔离系统
CN112791326A (zh) * 2020-12-31 2021-05-14 中铁第四勘察设计院集团有限公司 地铁车站用防烟防火空气幕

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756038A (en) * 1972-04-07 1973-09-04 Emhart Corp Refrigerated display equipment

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211078A (en) * 1963-06-06 1965-10-12 Gunnar C F Asker Air curtain
FR2659782B1 (fr) * 1990-03-14 1992-06-12 Sgn Soc Gen Tech Nouvelle Procede et dispositif de separation dynamique de deux zones.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756038A (en) * 1972-04-07 1973-09-04 Emhart Corp Refrigerated display equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100894301B1 (ko) 2007-11-09 2009-04-24 김성호 상하 다단으로 적층 가능한 에어커튼 유닛
EP2218976A2 (en) 2009-01-21 2010-08-18 Flowair, Glogowski i Brzezinski sp.j. Air curtain with an auxiliary stream

Also Published As

Publication number Publication date
ATE187814T1 (de) 2000-01-15
GR3032835T3 (en) 2000-07-31
EP0645588A1 (en) 1995-03-29
ES2139708T3 (es) 2000-02-16
DE69422115T2 (de) 2000-04-13
DE69422115D1 (de) 2000-01-20
NL9301661A (nl) 1995-04-18

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