EP0900990A2 - Air curtain device pass - Google Patents

Air curtain device pass Download PDF

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Publication number
EP0900990A2
EP0900990A2 EP98114637A EP98114637A EP0900990A2 EP 0900990 A2 EP0900990 A2 EP 0900990A2 EP 98114637 A EP98114637 A EP 98114637A EP 98114637 A EP98114637 A EP 98114637A EP 0900990 A2 EP0900990 A2 EP 0900990A2
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EP
European Patent Office
Prior art keywords
air
flow
air flow
air curtain
rooms
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.)
Granted
Application number
EP98114637A
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German (de)
French (fr)
Other versions
EP0900990B1 (en
EP0900990A3 (en
Inventor
Hans Joachim Prof. M.Sc. Gerhardt
Eckehard Dr.-Ing. Fiedler
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.)
GERHARDT, HANS JOACHIM, PROF. DIPL.-ING.
Original Assignee
Ingenieurgemeinschaft Wsp Prof Dr-Ing Ckramer Prof Hj Gerhardt Msc
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Application filed by Ingenieurgemeinschaft Wsp Prof Dr-Ing Ckramer Prof Hj Gerhardt Msc filed Critical Ingenieurgemeinschaft Wsp Prof Dr-Ing Ckramer Prof Hj Gerhardt Msc
Publication of EP0900990A2 publication Critical patent/EP0900990A2/en
Publication of EP0900990A3 publication Critical patent/EP0900990A3/en
Application granted granted Critical
Publication of EP0900990B1 publication Critical patent/EP0900990B1/en
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    • 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 device for the contactless separation of two Spaces from each other by means of air curtains, which in the following also serve as passage or Gate air curtain system should be called.
  • Air curtains have been around Known for decades and are often used for the contactless sealing of the Access doors to e.g. B. department stores used. They generally consist of one flat jet flow, which results from a suitable flow guidance above the Door opening emerges. The properties of jet flows are described in the relevant Textbooks of fluid mechanics treated.
  • An effective separation two rooms - e.g. B. a department store interior from the atmosphere - arises when air of the core area of the air jet on that of the blow-out plane opposite side (bottom) hits.
  • the length of the core area is each after turbulence of the outflowing air four to six times the beam exit width.
  • the beam width should be chosen so that it is about 1/4 of the to be sealed Opening corresponds. This leads to very large jet widths with very large opening heights, e.g. B. very high gate openings.
  • the jet flow is composed of two partial jets.
  • the air curtain consists of two flat partial beams, which consist of a flow guide emerge above the door opening, which in the exit plane is divided in the longitudinal axis. In doing so, the one facing the respective area Jet supplied with air from this area. A touch of the two air flows with different temperature occurs only in the area of the parting line between the two partial beams. Air comes out of the partial jets at the same speed , there is only a slight mixing of the two partial beams.
  • the jet of air hitting the ground again divides approximately along its parting plane and flows into the respective area. Because of the Mixing the two partial beams along their parting plane is the core length of one such air jet consisting of at least two partial jets less than that Core length of a simple air jet. For the safe separation of different Areas of each other is the optimal beam width of the entire beam, consisting of z. B. two partial beams, about 1/3 the height of the to be sealed Opening.
  • the invention has for its object a device for non-contact To create two rooms that are separated by a very high door or Gate opening are interconnected. On the one hand, the performance of the Air curtain system and secondly the mixing of possibly under differently conditioned air of the two rooms can be minimized.
  • the advantages achieved with the invention are based on the formation of an air curtain, that separates the opening between two rooms without contact so that the jet width is as small as possible and that the air exchange between the atmospheres of the two rooms is minimized. This is the first time Non-contact separation of two rooms possible with low energy consumption, because the separation effect is not based on the volume flow of the air curtain, but on fluidic conditions.
  • the vertical section in FIG. 2 shows an advantageous embodiment of the Gate air curtain system according to the invention, in which the flow guide (3) in the Plane of the wall (5), which considered the separation between the two Areas (6) and (7) is divided.
  • the air flow (1) thus consists of the Partial beams (1a) and (1b), which enter areas (6) and (7), respectively from which the air drawn in by the fans (8) was taken.
  • the flow guides 4a and 4b are designed like the flow guide 3, but with a horizontally blown airflow in the case of Flow guide 4b and an air flow with a horizontal component in the case the flow guide 4a.
  • FIG. 3 For the situation shown in FIG. 3 there is the opening (2) to be sealed. in the immediate vicinity of a lateral boundary wall (9) which is vertical or runs approximately perpendicular to the sealing plane.
  • the airflow (1) is here generated by a flow guide (3), (4a) and (4b), only on the Wall 9 opposite the lateral boundary of the sealing level (2) Flow guidance (4a) and (4b) is provided.
  • the lateral edges of the Passage also used as a flow guide.
  • the one used is preferably sufficient Area to the ground.
  • At least one complete is particularly preferred Side area and the entire overhead area used as flow guidance.
  • the side edges are preferably perpendicular to the blow-out direction run, it is also a preferred embodiment if an air flow blown out with a horizontal component at an angle to the edge at which it emerges becomes.

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  • 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)
  • Ventilation (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)

Abstract

The air current emerges from flow guides (3)parallel to the dividing plane in an upper limit and at least one lateral limit of the through passage aperture. The air current is produced by axial fans (8) arranged in the flow guides. The air current comprises two part jets (1a,1b) being taken from the respective rooms (5,6).

Description

Die Erfindung betrifft eine Vorrichtung zur berührungsfreien Abtrennung zweier Räume von einander mittels Luftschleier, die im folgenden auch als Durchgangs- oder Torluftschleieranlage bezeichnet werden soll. Luftschleieranlagen sind seit Jahrzehnten bekannt und werden vielfach zur berührungslosen Abdichtung der Zugangstüren zu z. B. Kaufhäusern benutzt. Sie bestehen im allgemeinen aus einer ebenen Strahlströmung, welche aus einer geeigneten Strömungsführung oberhalb der Türöffnung austritt. Die Eigenschaften von Strahlströmungen werden in den einschlägigen Textbüchern der Strömungsmechanik behandelt. Eine effektive Abtrennung zweier Räume - z. B. eines Kaufhausinnenraumes von der Atmosphäre - ergibt sich, wenn Luft des Kernbereichs des Luftstrahles auf den der Ausblasebene gegenüberliegenden Seite (Boden) auftrifft. Die Länge des Kernbereiches beträgt je nach Turbulenz der ausströmenden Luft das vier- bis sechsfache der Strahlaustrittsbreite. Bei üblichen Luftschleieranlagen, bei denen zur Vermeidung hoher Druckverluste die aus der Strömungsführung austretende Luft vergleichsweise turbulent ist, sollte die Strahlbreite so gewählt werden, daß sie etwa 1/4 der abzudichtenden Öffnung entspricht. Dies führt zu sehr großen Strahlbreiten bei sehr großen Öffnungshöhen, z. B. sehr hohen Toröffnungen. The invention relates to a device for the contactless separation of two Spaces from each other by means of air curtains, which in the following also serve as passage or Gate air curtain system should be called. Air curtains have been around Known for decades and are often used for the contactless sealing of the Access doors to e.g. B. department stores used. They generally consist of one flat jet flow, which results from a suitable flow guidance above the Door opening emerges. The properties of jet flows are described in the relevant Textbooks of fluid mechanics treated. An effective separation two rooms - e.g. B. a department store interior from the atmosphere - arises when air of the core area of the air jet on that of the blow-out plane opposite side (bottom) hits. The length of the core area is each after turbulence of the outflowing air four to six times the beam exit width. With conventional air curtain systems, in order to avoid high pressure losses the air emerging from the flow is comparatively turbulent is, the beam width should be chosen so that it is about 1/4 of the to be sealed Opening corresponds. This leads to very large jet widths with very large opening heights, e.g. B. very high gate openings.

Falls die Temperaturen in den mittels Luftschleiern von einander abzutrennenden Räumen groß sind, erweisen sich Luftschleieranlagen vorteilhaft, bei welchen sich die Strahlströmung aus zwei Teilstrahlen zusammensetzt. Solche Systeme sind beispielsweise in den Patentschriften US 3211078 und US 3229609 beschrieben. Bei diesen Systemen besteht der Luftschleier aus zwei ebenen Teilstrahlen, welche aus einer Strömungsführung oberhalb der Türöffnung austreten, welche in der Austrittsebene in Längsachse geteilt ist. Dabei wird der dem jeweiligen Bereich zugewandte Strahl mit Luft aus diesem Bereich versorgt. Eine Berührung der beiden Luftströme mit unterschiedlicher Temperatur erfolgt nur im Bereich der Trennebene zwischen den beiden Teilstrahlen. Tritt die Luft aus den Teilstrahlen mit derselben Geschwindigkeit aus, so ergibt sich eine nur geringe Vermischung der beiden Teilstrahlen. Der auf den Boden auftreffende Luftstrahl teilt sich wiederum näherungsweise entlang seiner Trennebene und strömt in den jeweiligen Bereich ab. Wegen der Mischung der beiden Teilstrahlen entlang ihrer Trennebene ist die Kernlänge eines solchen Luftstrahles bestehend aus mindestens zwei Teilstrahlen geringer als die Kernlänge eines einfachen Luftstrahles. Zur sicheren Abtrennung unterschiedlicher Bereiche voneinander beträgt die optimale Strahlbreite des gesamten Strahles, bestehend aus z. B. zwei Teilstrahlen, etwa 1/3 der Höhe der abzudichtenden Öffnung.If the temperatures in those to be separated from each other by means of air curtains Rooms are large, air curtain systems have proven to be advantageous the jet flow is composed of two partial jets. Such systems are, for example in the patents US 3211078 and US 3229609. At In these systems, the air curtain consists of two flat partial beams, which consist of a flow guide emerge above the door opening, which in the exit plane is divided in the longitudinal axis. In doing so, the one facing the respective area Jet supplied with air from this area. A touch of the two air flows with different temperature occurs only in the area of the parting line between the two partial beams. Air comes out of the partial jets at the same speed , there is only a slight mixing of the two partial beams. The jet of air hitting the ground again divides approximately along its parting plane and flows into the respective area. Because of the Mixing the two partial beams along their parting plane is the core length of one such air jet consisting of at least two partial jets less than that Core length of a simple air jet. For the safe separation of different Areas of each other is the optimal beam width of the entire beam, consisting of z. B. two partial beams, about 1/3 the height of the to be sealed Opening.

Wendet man die oben beschriebenen Luftschleieranlagen zur berührungslosen Abdichtung sehr hoher Tür- oder Toröffnungen an, so ergibt sich ein wesentlicher Nachteil durch die erforderliche große Breite der Luftaustrittsebene. Geht man beispielsweise von einer Torhöhe H = 6 m aus, so betrüge die erforderliche Breite der Luftaustrittsebene (= Strahlbreite) s = 6/3 = 2 m. Verbunden mit dieser großen Strahlbreite ist ein großer Luftvolumenstrom und somit eine große erforderliche Antriebsleistung für die verwendeten Ventilatoren.Applying the air curtain systems described above for non-contact sealing very high door or gate openings, so there is an essential one Disadvantage due to the large width of the air outlet level. For example, if you go from a gate height H = 6 m, the required width would be Air outlet level (= jet width) s = 6/3 = 2 m. Linked to this big one Jet width is a large air volume flow and therefore a large required drive power for the fans used.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur berührungsfreien Abtrennung zweier Räume zu schaffen, welche durch eine sehr hohe Tür- bzw. Toröffnung miteinander verbunden sind. Dabei soll zum einen die Leistung der Luftschleieranlage und zum anderen die Vermischung der möglicherweise unter schiedlich konditionierten Luft der beiden Räume minimiert werden.The invention has for its object a device for non-contact To create two rooms that are separated by a very high door or Gate opening are interconnected. On the one hand, the performance of the Air curtain system and secondly the mixing of possibly under differently conditioned air of the two rooms can be minimized.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the characterizing part of the claim 1 specified features solved.

Zweckmäßige Ausführungsformen werden durch die Merkmale der Unteransprüche definiert.The features of the subclaims provide expedient embodiments Are defined.

Die mit der Erfindung erzielten Vorteile beruhen auf der Ausbildung eines Luftschleiers, der die Öffnung zwischen zwei Räumen berührungslos so abtrennt, daß die Strahlbreite möglichst gering ist und daß dennoch der Luftaustausch zwischen den Atmosphären der beiden Räume minimiert wird. Hierdurch wird erstmals eine berührungslose Trennung zweier Räume bei geringem Energieaufwand möglich, da die Abtrennwirkung nicht auf dem Volumenstrom des Luftschleiers, sondern auf strömungstechnischen Gegebenheiten beruht.The advantages achieved with the invention are based on the formation of an air curtain, that separates the opening between two rooms without contact so that the jet width is as small as possible and that the air exchange between the atmospheres of the two rooms is minimized. This is the first time Non-contact separation of two rooms possible with low energy consumption, because the separation effect is not based on the volume flow of the air curtain, but on fluidic conditions.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden, schematischen Zeichnungen näher erläutert. Es zeigen

Figur 1
eine Torluftschleieranlagen mit der abzudichtenden Öffnung dreisseitig zuströmender Luft in einer ersten Ausführung,
Figur 2
einen Vertikalschnitt in der Längsmittelachse der in Figur 1 dargestellten Anordnung und
Figur 3
eine zweite Ausführung einer Torluftschleieranlage, bei welcher eine Seite der abzudichtenden Öffnung unmittelbar von einer senkrecht zur Abdichtebene verlaufenden Wand begrenzt wird.
The invention is explained in more detail below on the basis of exemplary embodiments with reference to the accompanying schematic drawings. Show it
Figure 1
a gate air curtain system with the opening to be sealed, air flowing in on three sides in a first embodiment,
Figure 2
a vertical section in the longitudinal central axis of the arrangement shown in Figure 1 and
Figure 3
a second embodiment of a door air curtain system, in which one side of the opening to be sealed is directly delimited by a wall running perpendicular to the sealing plane.

Die aus Figur 1 ersichtliche, allgemein durch die Bezugszeichen (3), (4a) und (4b) angedeuteten Strömungsführungen erzeugen einen Luftstrom (1), welcher parallel zur Abdichtebene (2) und senkrecht oder näherungsweise senkrecht zur oberen Berandung entsprechend der Strömungsführung (3) und senkrecht oder näherungsweise senkrecht zu den seitlichen Berandungen entsprechend den Strömungsführungen (4a) und (4b) austritt.The one shown in Figure 1, generally by the reference numerals (3), (4a) and (4b) indicated flow guides generate an air flow (1) which is parallel to the sealing level (2) and perpendicular or approximately perpendicular to the upper one Boundary in accordance with the flow guide (3) and vertically or approximately perpendicular to the side edges according to the flow guides (4a) and (4b) emerges.

Der Vertikalschnitt in Figur 2 zeigt eine vorteilhafte Ausführung der erfindungsgemäßen Torluftschleieranlage, bei der die Strömungsführung (3) in der Ebene der Wand (5), welche die Abtrennung zwischen den beiden betrachteten Bereichen (6) und (7) darstellt, geteilt ist. Der Lufstrom (1) besteht also aus den Teilstrahlen (1a) und (1b), welche in die Bereiche (6) bzw. (7) eintreten, aus welchen die durch die Ventilatoren (8) angesaugte Luft jeweils entnommen wurde. Die Strömungsführungen 4a und 4b sind wie die Strömungsführung 3 ausgebildet, jedoch mit einem horizontal ausgeblasenen Luftstrom im Falle der Strömungsführung 4b und einem Luftstrom mit horizontaler Komponente im Falle der Strömungsführung 4a.The vertical section in FIG. 2 shows an advantageous embodiment of the Gate air curtain system according to the invention, in which the flow guide (3) in the Plane of the wall (5), which considered the separation between the two Areas (6) and (7) is divided. The air flow (1) thus consists of the Partial beams (1a) and (1b), which enter areas (6) and (7), respectively from which the air drawn in by the fans (8) was taken. The flow guides 4a and 4b are designed like the flow guide 3, but with a horizontally blown airflow in the case of Flow guide 4b and an air flow with a horizontal component in the case the flow guide 4a.

Für die in Figur 3 dargestellte Situation befindet sich die abzudichtende Öffnung (2) in unmittelbarer Nähe einer seitlichen Begrenzungswand (9), welche senkrecht oder näherungsweise senkrecht zur Abdichtebene verläuft. Der Luftstrom (1) wird hier durch eine Strömungsführung (3), (4a) und (4b) erzeugt, wobei lediglich an der der Wand 9 gegenüberliegenden seitlichen Begrenzung der Abdichtebene (2) eine Strömungsführung (4a) und (4b) vorgesehen ist.For the situation shown in FIG. 3 there is the opening (2) to be sealed. in the immediate vicinity of a lateral boundary wall (9) which is vertical or runs approximately perpendicular to the sealing plane. The airflow (1) is here generated by a flow guide (3), (4a) and (4b), only on the Wall 9 opposite the lateral boundary of the sealing level (2) Flow guidance (4a) and (4b) is provided.

Es wird somit ein Bereich von wenigstens einer der seitlichen Berandungen des Durchgangs als Strömungsführung mitverwendet. Vorzugsweise reicht der genutzte Bereich bis zum Boden. Besonders bevorzugt werden wenigstens ein kompletter Seitenbereich und der gesamte Überkopfbereich als Strömungsführung genutzt. Obgleich die seitlichen Berandungen vorzugsweise senkrecht zur Ausblasrichtung verlaufen, entspricht es ebenso einer bevorzugten Ausführung, wenn ein Luftstrom mit horizontaler Komponente schräg zur Berandung, bei der er austritt, ausgeblasen wird.There is thus a region of at least one of the lateral edges of the Passage also used as a flow guide. The one used is preferably sufficient Area to the ground. At least one complete is particularly preferred Side area and the entire overhead area used as flow guidance. Although the side edges are preferably perpendicular to the blow-out direction run, it is also a preferred embodiment if an air flow blown out with a horizontal component at an angle to the edge at which it emerges becomes.

Claims (4)

Durchgangsluftschleieranlage zur berührungsfreien Abtrennung zweier Räume (6) und (7) voneinander, dadurch gekennzeichnet, daß ein zur Trennung der beiden Räume (6) und (7) erforderlicher Luftstrom (1) aus einer oder mehreren in einer oberen Begrenzung und wenigstens einer seitlichen Begrenzung der Durchgangsöffnung (2) befindlichen Strömungsführung (3, 4a und 4b) parallel zur Abtrennebene austritt.Through air curtain system for the contact-free separation of two rooms (6) and (7) from one another, characterized in that an air flow (1) required for separating the two rooms (6) and (7) consists of one or more in an upper boundary and at least one lateral boundary the throughflow (2) located flow guide (3, 4a and 4b) emerges parallel to the separation plane. Durchgangsluftschleieranlage zur berührungsfreien Abtrennung zweier Räume (6) und (7) voneinander nach Anspruch 1, dadurch gekennzeichnet, daß der Luftstrom (1) durch Axialventilatoren (8) erzeugt wird, die in Strömungsführungen (3), (4a) und (4b) angeordnet sind, welche sich an der Begrenzung der abzudichtenden Öffnung befinden. Through air curtain system for the contact-free separation of two rooms (6) and (7) from one another according to claim 1, characterized in that the air flow (1) is generated by axial fans (8) which are arranged in flow guides (3), (4a) and (4b) which are located at the boundary of the opening to be sealed. Durchgangsluftschleieranlage gemäß den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß der Luftstrom (1) aus zwei Teilstrahlen (1a) und (1b) besteht, welche durch getrennte, aber benachbarte Strömungsführungen (3), bzw (4a) und (4b) gebildet sind, mittels derer der Luftstrom des Teilstrahls (1b) aus dem einen Raum (6) und der Luftstrom des Teilstrahls (1a) aus dem anderen Raum (5) entnommen wird.Through air curtain system according to claims 1 or 2, characterized in that the air flow (1) consists of two partial jets (1a) and (1b), which are formed by separate but adjacent flow guides (3), (4a) and (4b) , by means of which the air flow of the partial jet (1b) is taken from one room (6) and the air flow of the partial jet (1a) from the other room (5). Durchgangsluftschleieranlage zur berührungsfreien Abtrennung zweier Räume (6) und (7) voneinander nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Luftstrom (1) an der Oberseite und einer vertikalen und/oder schrägen Begrenzung der Öffnung (2) parallel zur Abdichtebene ausgeblasen wird und sich in der Nähe der vertikalen und/oder schrägen Begrenzung der Öffnung (2) eine Wand (9) senkrecht und/oder schräg zur Abdichtebene befindet, welche als Prallfläche für den Lufstrom (1) dient.Through air curtain system for the contact-free separation of two rooms (6) and (7) from one another according to one of claims 1 to 3, characterized in that the air flow (1) on the top and a vertical and / or oblique delimitation of the opening (2) parallel to the sealing plane is blown out and in the vicinity of the vertical and / or oblique boundary of the opening (2) there is a wall (9) perpendicular and / or obliquely to the sealing plane, which serves as an impact surface for the air flow (1).
EP98114637A 1997-09-03 1998-08-04 Air curtain device pass Expired - Lifetime EP0900990B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19738535 1997-09-03
DE19738535A DE19738535A1 (en) 1997-09-03 1997-09-03 Through air curtain system

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EP0900990A2 true EP0900990A2 (en) 1999-03-10
EP0900990A3 EP0900990A3 (en) 2000-07-19
EP0900990B1 EP0900990B1 (en) 2003-11-19

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020089572A1 (en) * 2018-11-01 2020-05-07 CPA Engineered Solutions Limited Air barrier
US20210095873A1 (en) * 2018-02-16 2021-04-01 Wirth Doors Limited An Active Airflow Inhibiting Apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19932708A1 (en) * 1999-07-16 2001-01-25 Lks Luft Und Klimaservice Chri Arrangement for generating air curtain on door to low temperature room has air inlet to fan in low temperature room, outlet nozzle arranged along boundary of door in low temperature room

Citations (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
US3229609A (en) 1964-01-15 1966-01-18 Nat Ind Equipment Co Multiple air screen for use with a doorway

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608468A (en) * 1969-08-15 1971-09-28 Cloise M Mcclurkin Adjustable air-curtain system
SE400632C (en) * 1975-11-06 1984-07-09 Jansson Bror Ingvar Erling DEVICE FOR PREVENTING THE FLOW OF AIR THROUGH AN OPENING BETWEEN TWO SPACES
DE29715816U1 (en) * 1997-09-03 1998-01-02 Gerhardt, Hans-Joachim, Prof. M.Sc. Dipl.-Ing., 52072 Aachen Through air curtain system

Patent Citations (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
US3229609A (en) 1964-01-15 1966-01-18 Nat Ind Equipment Co Multiple air screen for use with a doorway

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210095873A1 (en) * 2018-02-16 2021-04-01 Wirth Doors Limited An Active Airflow Inhibiting Apparatus
WO2020089572A1 (en) * 2018-11-01 2020-05-07 CPA Engineered Solutions Limited Air barrier

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Publication number Publication date
DE59810210D1 (en) 2003-12-24
DE19738535A1 (en) 1999-03-04
EP0900990B1 (en) 2003-11-19
EP0900990A3 (en) 2000-07-19

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