EP0406593B1 - Air outlet cabinet of trapezoidal cross section - Google Patents
Air outlet cabinet of trapezoidal cross section Download PDFInfo
- Publication number
- EP0406593B1 EP0406593B1 EP90111181A EP90111181A EP0406593B1 EP 0406593 B1 EP0406593 B1 EP 0406593B1 EP 90111181 A EP90111181 A EP 90111181A EP 90111181 A EP90111181 A EP 90111181A EP 0406593 B1 EP0406593 B1 EP 0406593B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- air outlet
- perforated
- sections
- section
- 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
Links
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000001965 increasing effect Effects 0.000 abstract description 3
- 230000035515 penetration Effects 0.000 abstract description 2
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000003570 air Substances 0.000 description 37
- 239000000428 dust Substances 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
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
- F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
-
- 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
Definitions
- the invention relates to a trapezoidal air outlet box consisting of a cover with a connecting piece, a perforated bottom divided into three sections with a section horizontally arranged at a distance from the connecting piece and two sections which adjoin it laterally and rise to the outside.
- Such a device known for generating a displacement flow from DE 36 43 175 A1 has nozzles arranged in rows as outlet openings over the surface of the air outlet box bottom, the center distance of which from one another corresponds to at least three to twelve times the outlet diameter of the nozzles. This device is intended to ensure that a substantially lower air volume flow is sufficient to obtain a stable displacement flow.
- the air outlets previously preferred in such companies are designed in such a way that they generate highly inductive air jets with a long throw. This creates room air rollers that ensure an even temperature and moisture distribution in the room. Due to the increase in performance of the production machines, especially in textile companies, the dust development is so great that the technology of the air rollers, i. H. the highly inductive air jets lead to unpleasant dust concentration, since the dust particles are distributed throughout the production hall.
- the invention has for its object to improve the known displacement outlet so that even less dust particles are mixed and distributed with the room air and an even better displacement towards the room floor is achieved, so that the dust concentration in the occupied area decreases further and in particular by the Air flow an upward movement of the dust particles is suppressed.
- the air flow from a large number of small perforations is naturally low in turbulence, the turbulence decreasing with a smaller diameter.
- An air outlet speed in the range of 0.2 to 2 m / sec can thus be achieved via the perforations.
- Low-turbulence air jets are unstable at such a low exit speed and tend to fall off quickly.
- the air outlet box is completed according to the invention by swirl outlets built into it.
- the air jets from the swirl outlets are highly turbulent per se, but in the air outlet box according to the invention they induce the supply air which emerges from the adjacent perforations and leave the ambient air largely unaffected.
- the swirl outlets therefore have the task of increasing the stability of the air jet which emerges as a result of the larger jet pulse.
- the three sections forming the bottom and the longitudinal side walls of the air outlet box are formed from perforated plates, the holes of which have a diameter of 2 to 15 mm, preferably 3 to 8 mm, the hole spacing being chosen such that the free passage cross-section is 15 to 50%, preferably 20 to 30%, of the perforated plate area.
- swirl outlets are each arranged in a row at a uniform distance over the longitudinal extent of the box.
- an embodiment of the invention provides that preferably two baffles are arranged in the interior of the box, each of which can be pivoted about an axis parallel to the longitudinal central axis of the box.
- the air outlet according to the invention can either be mounted directly under the ceiling or suspended at a distance from it.
- the air outlet box is covered on the ceiling side by a cover 2 provided with a connecting piece 1.
- a bottom 3 is composed of a horizontal section 4 and two sections 5 adjoining it laterally and rising to the outside. Side walls 6 connect the cover 2 to the bottom 3.
- the three sections 4 and 5 forming the base 3 and the vertically oriented longitudinal side walls 6 are perforated and formed from perforated sheets.
- swirl outlets 7 are installed, which are arranged at regular intervals distributed over the longitudinal axis of the air outlet box.
- baffles 8 are mounted so as to be pivotable about a rotational axis parallel to the longitudinal center axis of the air outlet box.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Duct Arrangements (AREA)
- Air-Flow Control Members (AREA)
- Connection Or Junction Boxes (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
- Devices For Use In Laboratory Experiments (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Die Erfindung betrifft einen trapezförmigen Luftauslaßkasten aus einem Deckel mit einem Anschlußstutzen, einem in drei Abschnitte unterteilten perforierten Boden mit einem dem Anschlußstutzen in einem Abstand gegenüberliegend horizontal angeordneten Abschnitt und zwei sich daran seitlich anschließenden, nach außen ansteigenden Abschnitten.The invention relates to a trapezoidal air outlet box consisting of a cover with a connecting piece, a perforated bottom divided into three sections with a section horizontally arranged at a distance from the connecting piece and two sections which adjoin it laterally and rise to the outside.
Eine derartige zur Erzeugung einer Verdrängungsströmung aus der DE 36 43 175 A1 bekannte Vorrichtung besitzt als Austrittsöffnungen über die Fläche des Luftauslaßkastenbodens in Reihen angeordnete Düsen, deren Mittelabstand voneinander mindestens dem drei- bis zwölffachen Austrittsdurchmesser der Düsen entspricht. Mit dieser Vorrichtung soll erreicht werden, daß ein wesentlich geringerer Luftvolumenstrom ausreicht, um eine stabile Verdrängungsströmung zu erhalten.Such a device known for generating a displacement flow from DE 36 43 175 A1 has nozzles arranged in rows as outlet openings over the surface of the air outlet box bottom, the center distance of which from one another corresponds to at least three to twelve times the outlet diameter of the nozzles. This device is intended to ensure that a substantially lower air volume flow is sufficient to obtain a stable displacement flow.
Für Produktionsstätten mit intensiver Staubentwicklung, wie zum Beispiel in Baumwollspinnereien, ist es vorteilhaft, Luftauslässe einzusetzen, die eine turbulenzarme Strahlcharakteristik aufweisen. Auf diese Weise soll die Staubaufwirbelung im Raum reduziert werden. Wird die Zuluft oberhalb der Maschinen turbulenzarm ausgeblasen und die Abluft in Bodennähe abgesaugt, so verdrängen die turbulenzarmen Luftstrahlen die Staubpartikel zum Boden und entlasten die Raumluft vor erhöhter Staubkonzentration.For production facilities with intensive dust development, such as in cotton spinning mills, it is advantageous to use air outlets that have a low-turbulence jet characteristic. In this way, the dust in the room should be reduced. If the supply air above the machines is blown out with low turbulence and the exhaust air is extracted near the floor, the low-turbulence air jets displace the dust particles to the floor and relieve the room air from increased dust concentration.
Die bisher in solchen Betrieben bevorzugten Luftauslässe sind so ausgelegt, daß sie hochinduktive Luftstrahlen mit großer Wurfweite erzeugen. Dadurch entstehen Raumluftwalzen, die eine gleichmäßige Temperatur- und Feuchtigkeitsverteilung im Raum sicherstellen. Durch die Leistungserhöhung der Produktionsmaschinen ist vor allem in Textilbetrieben die Staubentwicklung so groß, daß die Technik der Raumluftwalzen, d. h. die hochinduktiven Luftstrahlen, zu unangenehmer Staubkonzentration führen, da die Staubpartikel in der gesamten Produktionshalle verteilt werden.The air outlets previously preferred in such companies are designed in such a way that they generate highly inductive air jets with a long throw. This creates room air rollers that ensure an even temperature and moisture distribution in the room. Due to the increase in performance of the production machines, especially in textile companies, the dust development is so great that the technology of the air rollers, i. H. the highly inductive air jets lead to unpleasant dust concentration, since the dust particles are distributed throughout the production hall.
Der Erfindung liegt die Aufgabe zugrunde, den vorbekannten Verdrängungsauslaß so zu verbessern, daß noch weniger Staubpartikel mit der Raumluft vermischt und verteilt werden und eine noch bessere Verdrängung in Richtung zum Raumboden hin erzielt wird, so daß die Staubkonzentration im Aufenthaltsbereich weiter abnimmt und insbesondere durch die Luftströmung eine Auftriebsbewegung der Staubpartikel unterdrückt wird.The invention has for its object to improve the known displacement outlet so that even less dust particles are mixed and distributed with the room air and an even better displacement towards the room floor is achieved, so that the dust concentration in the occupied area decreases further and in particular by the Air flow an upward movement of the dust particles is suppressed.
Zur Lösung dieser Aufgabe wird von einem Luftauslaßkasten der im Oberbegriff des Anspruchs 1 genannten gattungsgemäßen Art ausgegangen, welcher erfindungsgemäß die im kennzeichnenden Teil desselben angegebenen Merkmale aufweist.To solve this problem, an air outlet box of the generic type mentioned in the preamble of
Die erfindungsgemäße Kombination, die Luftaustrittsquerschnitte durch Perforationen und Drallauslässe zu bilden, ergibt folgenden überraschenden Vorteil:The combination according to the invention, the air outlet cross sections through perforations and Forming swirl outlets gives the following surprising advantage:
Die Luftströmung aus einer Vielzahl im Durchmesser kleiner Perforationen ist naturgemäß turbulenzarm, wobei die Turbulenz mit kleinerem Durchmesser abnimmt. Es läßt sich somit über die Perforationen eine Luftaustrittsgeschwindigkeit im Bereich von 0,2 bis 2 m/sec erzielen. Turbulenzarme Luftstrahlen sind bei einer derartig geringen Austrittsgeschwindigkeit instabil und neigen dazu schnell abzufallen. Um dies zu verhindern und die Eindringtiefe der Luftstrahlen zu erhöhen, ist der Luftauslaßkasten erfindungsgemäß durch darin eingebaute Drallauslässe vervollständigt. Die Luftstrahlen aus den Drallauslässen sind zwar an sich hochturbulent jedoch induzieren sie beim erfindungsgemäßen Luftauslaßkasten die Zuluft, welche aus den benachbarten Perforationen austritt, und lassen die Raumluft weitgehend unbeeinflußt. Den Drallauslässen kommt somit die Aufgabe zu, durch den größeren Strahlimpuls die Stabilität des insgesamt austretenden Luftstrahles zu erhöhen.The air flow from a large number of small perforations is naturally low in turbulence, the turbulence decreasing with a smaller diameter. An air outlet speed in the range of 0.2 to 2 m / sec can thus be achieved via the perforations. Low-turbulence air jets are unstable at such a low exit speed and tend to fall off quickly. In order to prevent this and to increase the depth of penetration of the air jets, the air outlet box is completed according to the invention by swirl outlets built into it. The air jets from the swirl outlets are highly turbulent per se, but in the air outlet box according to the invention they induce the supply air which emerges from the adjacent perforations and leave the ambient air largely unaffected. The swirl outlets therefore have the task of increasing the stability of the air jet which emerges as a result of the larger jet pulse.
Gemäß einer besonders vorteilhaften Ausgestaltung der Erfindung sind die drei den Boden bildenden Abschnitte und die Längsseitenwände des Luftauslaßkastens aus Lochblechen gebildet, deren Löcher einen Durchmesser von 2 bis 15 mm, vorzugsweise 3 bis 8 mm, aufweisen, wobei der Lochabstand so gewählt ist, daß der freie Durchtrittsquerschnitt 15 bis 50 %, vorzugsweise 20 bis 30 %, der Lochblechfläche beträgt.According to a particularly advantageous embodiment of the invention, the three sections forming the bottom and the longitudinal side walls of the air outlet box are formed from perforated plates, the holes of which have a diameter of 2 to 15 mm, preferably 3 to 8 mm, the hole spacing being chosen such that the free passage cross-section is 15 to 50%, preferably 20 to 30%, of the perforated plate area.
Vorzugsweise sind in gleichmäßigem Abstand über die Längserstreckung des Kastens mehrere Drallauslässe jeweils in Reihe angeordnet.Preferably, several swirl outlets are each arranged in a row at a uniform distance over the longitudinal extent of the box.
Schließlich sieht eine Ausgestaltung der Erfindung noch vor, daß im Innern des Kastens vorzugsweise zwei Leitbleche angeordnet sind, die um jeweils eine zur Längsmittelachse des Kastens parallele Achse verschwenkbar sind.Finally, an embodiment of the invention provides that preferably two baffles are arranged in the interior of the box, each of which can be pivoted about an axis parallel to the longitudinal central axis of the box.
Durch die Betätigung der sich über die gesamte Länge des Luftauslaßkastens erstreckenden Leitbleche läßt sich der Anteil des Luftvolumenstromes, der senkrecht nach unten geblasen wird, verändern.By actuating the guide plates which extend over the entire length of the air outlet box, the proportion of the air volume flow which is blown vertically downward can be changed.
Der erfindungsgemäße Luftauslaß kann entweder direkt unter der Decke oder aber auch in einem Abstand dazu abgehängt montiert werden.The air outlet according to the invention can either be mounted directly under the ceiling or suspended at a distance from it.
In der Zeichnung ist ein Ausführungsbeispiel des erfindungsgemäßen Luftauslaßkastens schematisch dargestellt. Es zeigen:
- Fig. 1
- einen Querschnitt durch den Luftauslaßkasten
und - Fig. 2
- einen Luftauslaßkasten gemäß Fig. 1 in verkleinertem Maßstab mit durch Pfeile veranschaulichter Strahlcharakteristik.
- Fig. 1
- a cross section through the air outlet box
and - Fig. 2
- an air outlet box according to FIG. 1 on a reduced scale with the jet characteristic illustrated by arrows.
Der Luftauslaßkasten ist deckenseitig durch einen mit einem Anschlußstutzen 1 versehenen Deckel 2 abgedeckt. Ein Boden 3 ist aus einem horizontalen Abschnitt 4 und zwei sich seitlich daran anschließenden, nach außen ansteigenden Abschnitten 5 zusammengesetzt. Seitenwände 6 verbinden den Deckel 2 mit dem Boden 3.The air outlet box is covered on the ceiling side by a
Die drei den Boden 3 bildenden Abschnitte 4 und 5 sowie die vertikal ausgerichteten Längsseitenwände 6 sind perforiert und aus Lochblechen gebildet. Im Abschnitt 4 des Bodens 3 sind ebenso wie in den Längsseitenwänden 6 Drallauslässe 7 eingebaut, welche in gleichmäßigen Abständen über die Längsachse des Luftauslaßkastens verteilt angeordnet sind.The three sections 4 and 5 forming the
Im Innern des Luftauslaßkastens sind zwei Leitbleche 8 um jeweils eine zur Längsmittelachse des Luftauslaßkastens parallele Drehachse verschwenkbar gelagert.In the interior of the air outlet box, two baffles 8 are mounted so as to be pivotable about a rotational axis parallel to the longitudinal center axis of the air outlet box.
Claims (4)
- A trapezoidal air outlet box comprising a cover with a connection piece (1), a perforated base (3) subdivided into three sections (4, 5) with one horizontally disposed section (4) opposite and at a distance from the connection piece and two sections (5) attached laterally to the section (4) and rising towards the outside, characterised in that, in addition to the three sections (4, 5) forming the base (3), two vertically aligned longitudinal sidewalls (6) which join the cover (2) and the base (3) to each other are also perforated, and that at least the central, horizontally disposed section (4) of the three sections (4, 5) forming the base (3) and the two longitudinal side walls (6) are each provided with at least one spin outlet (7).
- An air outlet box according to claim 1, characterised in that the three sections (4, 5) forming the base (3) and the longitudinal sidewalls (6) are constructed from perforated plates, the holes in which have a diameter of 2 to 15 mm, preferably 3 to 8 mm, wherein the hole spacing is selected so that the free passage cross-section is 15 to 50 %, preferably 20 to 30 %, of the areas of the perforated plates.
- An air outlet box according to claims 1 or 2, characterised in that a plurality of spin outlets (7), in a row each time, are disposed at a uniform spacing over the longitudinal extent of the box.
- An air outlet box according to at least one of claims 1 to 3, characterised in that preferably two guide plates (8) are provided inside the box, and can each pivot about an axis of rotation parallel to the longitudinal centre line of the box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90111181T ATE90150T1 (en) | 1989-07-03 | 1990-06-13 | TRAPEZOIDAL AIR OUTLET BOX. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3921813A DE3921813C2 (en) | 1989-07-03 | 1989-07-03 | Trapezoidal air outlet |
| DE3921813 | 1989-07-03 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0406593A2 EP0406593A2 (en) | 1991-01-09 |
| EP0406593A3 EP0406593A3 (en) | 1992-01-02 |
| EP0406593B1 true EP0406593B1 (en) | 1993-06-02 |
Family
ID=6384183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90111181A Expired - Lifetime EP0406593B1 (en) | 1989-07-03 | 1990-06-13 | Air outlet cabinet of trapezoidal cross section |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5054379A (en) |
| EP (1) | EP0406593B1 (en) |
| AT (1) | ATE90150T1 (en) |
| DD (1) | DD296345A5 (en) |
| DE (2) | DE3921813C2 (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK12792D0 (en) * | 1992-02-03 | 1992-02-03 | Ke Safematic As | VENTILATION |
| CA2071680C (en) * | 1992-06-19 | 1998-05-05 | Walter D. Klassen | Radial flow diffuser |
| DE4416841C2 (en) * | 1994-05-13 | 1997-10-23 | Mueller Erwin Gmbh & Co | Air outlet, especially ceiling air outlet |
| US6059655A (en) * | 1996-01-24 | 2000-05-09 | Chemfab Corporation | Fabric air diffuser, method for diffusing air, and method for attenuating noise associated with flowing air |
| US6139426A (en) | 1996-01-24 | 2000-10-31 | Chemfab Corporation | Molded polymer air diffusing screen |
| US5725427A (en) * | 1996-01-24 | 1998-03-10 | Chemfab Corporation | Fabric air diffuser, method for diffusing air, and method for attenuating noise associated with flowing air |
| US6425821B1 (en) | 1996-01-24 | 2002-07-30 | Chemfab Corporation | Pore-containing web for diffusing fluids |
| US5807171A (en) * | 1996-06-17 | 1998-09-15 | E.H. Price Limited | Air diffuser apparatus |
| US5938525A (en) * | 1997-07-23 | 1999-08-17 | Tompkins Industries, Inc | Air diffuser, and mold and method for its production |
| FR2785040B1 (en) * | 1998-10-22 | 2001-01-19 | U N I R Ultra Propre Nutrition | DEVICE AND METHOD FOR THE CLOSELY PROTECTION OF PRODUCTS OR OBJECTS SENSITIVE TO AMBIENT AIR VEHICLE CONTAMINANTS |
| DE19921404C1 (en) * | 1999-05-08 | 2000-07-27 | Fritz Juergen Eidmann | Air outlet is used for wall installation and has air through-passage housing with perforated plate acting as air outlet in which are at least two swirl outlets |
| US6361432B1 (en) | 1999-08-17 | 2002-03-26 | Tomkins Industries, Inc. | Air diffuser with air flow regulator |
| US6251007B1 (en) * | 2000-02-05 | 2001-06-26 | Randall L. Smith | Transition inlet diffuser |
| SE526035C2 (en) * | 2002-09-04 | 2005-06-21 | Johnson Medical Dev Pte Ltd | Ventilation system, device and method |
| US7641125B2 (en) * | 2005-04-29 | 2010-01-05 | E.H. Price Ltd. | Variable air volume ceiling diffuser |
| US8911286B1 (en) * | 2010-01-05 | 2014-12-16 | Michael Lee Savigny | Concentric air diffuser with an angled supply air face |
| US20120282117A1 (en) * | 2010-01-06 | 2012-11-08 | Masaya Takahashi | Air blowing fan, circulator, micro-particle diffusion device, and air circulation method |
| FR2956899B1 (en) * | 2010-02-26 | 2015-04-03 | Thomas Faure | AIR CONDITIONING APPARATUS, ITS CONTROL METHOD, AND STRUCTURE COMPRISING SUCH AN APPARATUS |
| NZ631243A (en) * | 2014-09-08 | 2015-11-27 | Fusion Hvac Pty Ltd | Diffuser module |
| ES2897465T3 (en) * | 2015-05-12 | 2022-03-01 | Halton Oy | Controlled dilution flow in critical environments |
| CA3085629A1 (en) * | 2017-12-18 | 2019-06-27 | Bombardier Inc. | Overhead flow distribution assembly for aircraft cabin |
| DE102018112959B4 (en) * | 2018-05-30 | 2020-06-18 | Krantz Gmbh | Displacement air outlet |
| RU189502U1 (en) * | 2019-02-20 | 2019-05-24 | Юрий Васильевич Мальгин | AIR DISTRIBUTOR PANEL |
| EP4269900A1 (en) | 2022-04-28 | 2023-11-01 | Air'technologies | Diffuser conduit for diffusing air conditioning |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB591207A (en) * | 1945-05-02 | 1947-08-11 | Paul Brandt | An improved diffuser adapted to deliver a rotating or whirling current of air or gas |
| US2859681A (en) * | 1956-03-28 | 1958-11-11 | Joel R Rachlin | Air-flow ceiling arrangements |
| US3419714A (en) * | 1965-12-01 | 1968-12-31 | Sylvania Electric Prod | Air handling troffer |
| US3327607A (en) * | 1966-01-14 | 1967-06-27 | Wehr Corp | Air pattern control arrangement |
| CH509549A (en) * | 1968-07-01 | 1971-06-30 | Ltg Lufttechnische Gmbh | Air outlet device for air conditioning or ventilation systems |
| US3938430A (en) * | 1972-05-18 | 1976-02-17 | Koppang Ronald N | Air vents |
| DE2609030C3 (en) * | 1976-03-05 | 1984-05-24 | Fläkt AB, 13134 Nacka | Device for guiding air flows emerging from an air-permeable perforated surface |
| US4207864A (en) * | 1978-06-08 | 1980-06-17 | General Electric Company | Damper |
| SU932135A1 (en) * | 1980-11-24 | 1982-05-30 | Предприятие П/Я Г-4488 | Air distributor |
| US4372196A (en) * | 1981-03-30 | 1983-02-08 | Henderson Donald L | Insulating and draft preventing automatic shutter for attic and other exhaust type fans |
| GB2120778A (en) * | 1982-05-20 | 1983-12-07 | Howorth Air Eng Ltd | Outlet device for an air conditioning system |
| JPS62297656A (en) * | 1986-06-17 | 1987-12-24 | Nec Kyushu Ltd | Blow-off port for turbulent flow type air-conditioning system |
| DE3643175A1 (en) * | 1986-12-18 | 1988-06-30 | Krantz H Gmbh & Co | DEVICE FOR GENERATING A DISPLACEMENT FLOW |
| DE3822283A1 (en) * | 1988-07-01 | 1990-01-04 | Schako Metallwarenfabrik | SPIRAL OUTLET |
-
1989
- 1989-07-03 DE DE3921813A patent/DE3921813C2/en not_active Expired - Fee Related
-
1990
- 1990-06-12 US US07/537,043 patent/US5054379A/en not_active Expired - Fee Related
- 1990-06-13 AT AT90111181T patent/ATE90150T1/en not_active IP Right Cessation
- 1990-06-13 DE DE9090111181T patent/DE59001601D1/en not_active Expired - Fee Related
- 1990-06-13 EP EP90111181A patent/EP0406593B1/en not_active Expired - Lifetime
- 1990-07-02 DD DD90342426A patent/DD296345A5/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US5054379A (en) | 1991-10-08 |
| EP0406593A3 (en) | 1992-01-02 |
| DE3921813A1 (en) | 1991-01-17 |
| DE59001601D1 (en) | 1993-07-08 |
| DE3921813C2 (en) | 1995-03-30 |
| EP0406593A2 (en) | 1991-01-09 |
| DD296345A5 (en) | 1991-11-28 |
| ATE90150T1 (en) | 1993-06-15 |
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