EP0535550A1 - Sortie d'air - Google Patents

Sortie d'air Download PDF

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Publication number
EP0535550A1
EP0535550A1 EP92116445A EP92116445A EP0535550A1 EP 0535550 A1 EP0535550 A1 EP 0535550A1 EP 92116445 A EP92116445 A EP 92116445A EP 92116445 A EP92116445 A EP 92116445A EP 0535550 A1 EP0535550 A1 EP 0535550A1
Authority
EP
European Patent Office
Prior art keywords
air outlet
air
opening
outlet opening
sealing
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
EP92116445A
Other languages
German (de)
English (en)
Other versions
EP0535550B1 (fr
Inventor
Gerd-Eugen Dr.-Ing. Schaal
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.)
LTG Lufttechnische GmbH
Original Assignee
LTG Lufttechnische GmbH
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 LTG Lufttechnische GmbH filed Critical LTG Lufttechnische GmbH
Publication of EP0535550A1 publication Critical patent/EP0535550A1/fr
Application granted granted Critical
Publication of EP0535550B1 publication Critical patent/EP0535550B1/fr
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
    • 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
    • F24F13/072—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser of elongated shape, e.g. between ceiling panels

Definitions

  • the invention relates to an air outlet, in particular a slot outlet or a swirl outlet, with a housing which preferably accommodates at least one air guide element provided with an air outlet opening in an adjustable manner.
  • Air outlets are at the end of an often long way of air treatment; they are ultimately responsible for the direction and momentum of the air flow into a room or the like.
  • Air outlets of this type are preferably provided with end shutters in order to be able to install them optically in wall or ceiling openings.
  • soiling occurs very frequently on the wall or ceiling and also on the air outlet itself (in particular on the end panels).
  • This pollution is formed by mostly clearly defined streaks of dirt that come from entrained room air.
  • the air flow emerging from the air outlet leads to a lateral inflow of room air, with the particles contained therein (for example tobacco smoke) on the ceiling or wall Store directly in the area of the air outlet or at the air outlet itself.
  • This induced room air flow flows laterally towards the air outlet and is then entrained in the immediate vicinity of the air outlet opening by the conditioned and therefore clean supply air flow emerging from the air outlet opening.
  • the above-mentioned dirt streaks usually form in a contamination area of approximately 8 to 15 cm.
  • the object of the invention is therefore to create an air outlet which avoids the soiling mentioned.
  • the air outlet opening is assigned at least one sealing air outlet opening through which a part of the supply air supplied to the air outlet flows such that the sealing air flow exiting there passes to the housing and / or the adjacent air outlet installation wall or ceiling area, preferably after Coanda effect.
  • This sealing air flow forms an air curtain consisting of supplied primary air, which due to its abutment on the housing itself (in particular on the installation opening end cover) or the adjoining installation wall or ceiling area, thereby preventing room air from the side, especially by induction, which is provided with dirt particles contact with the areas covered by the air curtain, so that no pollution can occur.
  • the sealing air flow thus forms a kind of separating air wedge in the side area next to the air outlet opening of the air outlet. If slot outlets are used, a slot-shaped sealing air outlet opening is provided on both sides of the main air stream emerging from the air outlet opening, so that the aforementioned dirt streaks cannot form on both sides of the slot outlet and the adjacent wall or ceiling areas.
  • the air outlet opening for the main air flow is surrounded by an annular sealing air outlet opening, so that the sealing air flow emerges around the swirl outlet and prevents the deposition of dirt and room air particles. Due to the sealing air curtain mentioned, optimal flow conditions result, so that the use of the air outlet according to the invention brings about an acoustic improvement.
  • the sizes of the air outlet opening and the sealing air outlet opening are dimensioned such that approximately 80% to 90% of the supplied air exits from the air outlet opening and approximately 20% to 10% emerges from the sealing air outlet opening. It is particularly preferred if the air outlet opening and the sealing air outlet opening are assigned to one another in such a way that there is a stable jet separation between the main air stream emerging from the air outlet opening and the sealing air stream. This means, that there is always a separation between the sealing air flow and the main air flow, that is to say there is little or no turbulence among one another, even when the supply air flows are of different sizes.
  • the sizes of air outlet opening and sealing air outlet opening in particular the gap sizes of air outlet opening and sealing air outlet opening in a slot outlet, and the volume flows of main air flow and sealing air flow are coordinated with one another in such a way that stable jet separation is ensured.
  • two profile strips forming the housing are preferably provided, which receive adjustable air guide rollers between them forming air guide element, both profile strips being provided with a slot-shaped sealing air outlet opening and the air guide element provided with air outlet opening being located between the two sealing air outlet openings.
  • the housing has at least one installation opening cover web / end web (end panel), at least one inner wall web being at a distance from this, forming the slot-shaped sealing air outlet opening.
  • the sealing air outlet opening is thus formed between the installation opening cover web and the inner wall web.
  • both profile strips are each provided with an inner wall web, which clamps the air guide rollers record between them.
  • the profile strips are preferably acted upon by spring clips in such a way that they hold the air guide rollers in a clamped manner between them.
  • the slot-shaped sealing air outlet opening (s) are designed without interruption in the longitudinal direction. This results in a continuous sealing air curtain, which prevents the flow of polluted room air even in partial sections.
  • the air guide element in a design as a slot outlet with two profile strips forming the housing, it is provided that the air guide element is received in a clamping manner between these profile strips, the air guide element preferably being formed by air guide rollers.
  • the air guiding element has both the air outlet opening and at least one sealing air outlet opening.
  • the sealing air outlet opening is arranged next to the air outlet opening in such a way that the sealing air flow exiting there contacts the housing and / or the adjoining air outlet installation wall or ceiling area, preferably according to the Coanda effect.
  • the air guide rollers have the air outlet opening and also at least one sealing air outlet opening.
  • the air guiding element can also be used two sealing air outlet openings may be provided which have the air outlet opening between them.
  • the sealing air outlet opening which is designed as an annular slot, is located adjacent to the end ring, and the annular slot has one or more Air outlet openings for the main air flow encloses a ring.
  • the ring slot for the sealing air curtain thus forms an outer outlet area, which runs around the swirl outlet and prevents contaminated room air from flowing in from there.
  • This ring slot must not be confused with conventional air outlet slots for the usual ventilation of the room, since its primary task is not the supply of room air for ventilation of the room or the like, but prevents the above-mentioned pollution.
  • the other air outlet openings which do not serve the sealing air curtain, but rather the delivery of the main air flow, are preferably ring-shaped and / or circular in the aforementioned swirl outlet.
  • the air-guiding element has a base plate or a base plate section which preferably belongs to the housing and one on the base plate or the base plate section attached air guiding element is formed, wherein the air guiding element divides at least one base plate opening into the air outlet opening for the main air flow and the sealing air outlet opening.
  • This subdivision which can be carried out with simple means, leads to the base plate opening forming two regions, the main air stream emerging from one and the sealing air stream emerging from the other.
  • the air guide element preferably has an air guide wall which divides the base plate opening in the manner described above.
  • the air baffle can be inclined to the level of the base plate. This leads to a corresponding air outlet direction, so that there is no 90 ° angle, but an acute angle between the plane of the base plate and the directions of sealing air flow and / or main air flow.
  • the air guide wall passes through the base plate opening and overlaps an edge region of the base plate opening, the sealing air channel being formed between the overlapping section of the air guide wall and the overlapped edge region of the base plate opening.
  • the air guide wall thus extends - viewed in the direction of air flow - through the base plate opening and overlaps an edge region of the base plate opening, so that a channel for the sealing air takes place there.
  • the direction of the channel lies essentially parallel to the plane of the base plate, so that a Coanda effect is preferably achieved on an adjacent air outlet installation wall or ceiling area.
  • the air guide element For simple fastening of the air guide element, it can have a receiving slot which is at a distance from the air guide wall and into which the edge region of the base plate opening engages to form a plug-in seat.
  • the air guide element is fed to the edge region of the base plate opening for fastening such that the edge region enters the receiving slot. This leads to a plug or clamp fit. Due to the distance of the receiving slot from the air guide wall, the sealing air channel is formed between the air guide wall and the associated base plate section.
  • a plurality of base plate openings provided with air guiding elements are preferably provided on the base plate. Their number, arrangement and also the arrangement, direction and inclination of the respective air guide wall of each air guide element is predetermined by the desired air flow direction.
  • a radial arrangement of a plurality of base plate openings is provided, to which air guide elements of air guide elements which are inclined in such a way are assigned that the total air flow receives a swirl (vortex).
  • Figure 1 shows an air outlet 1, which is designed as a slot outlet 2. It has a housing 3, which is formed by two profile strips 4. The two profile strips 4 are held together by means of spring clips 5 (shown in broken lines in FIG. 1) in such a way that they clamply hold an air guide element 7 provided with an air outlet opening 6 between them.
  • the air-guiding element 7 is formed from a plurality of air-guiding rollers 8 lying in rows in a row.
  • each profile strip 4 has a back web 9 which merges into a central web 10, which is integrally connected to a side web 11.
  • the lower end of the central web 10 goes in an installation opening cover web 12 (or installation opening end web) via.
  • the inner wall 13 of the central web 10 is spaced apart from an inner wall web 14, which is curved concavely to the center of rotation 15 of the air guide roller 8 and runs approximately parallel to the outer contour 17 in the root region 16 of the installation opening cover web 12.
  • the distance between the inner wall web 14 and the central web 10 is maintained by thin-walled spacer webs 18, these spacer webs 18 being provided at uniform intervals — seen over the length of the slot outlet 1.
  • profile strip 4, spacer web 18 and inner wall web 14 are formed in one piece.
  • suitable means ensuring that the parts are held against one another without displacement.
  • a sealing air channel 19 is formed there, which ends in a sealing air outlet opening 20.
  • Each air guide roller 8 has a circular cross section with recesses 21, which interact with corresponding knobs 22 of the inner wall webs 14.
  • the air guide roller 8 has spaced disks 33 which are connected to one another via longitudinal webs 23 and 24, respectively.
  • the longitudinal web 23 is an oval hollow web educated; the longitudinal web 24 is approximately diametrically opposite the longitudinal web 23 and forms a peripheral wall section 25. Between the longitudinal webs 23 and 24, an air passage channel 26 is formed, which opens into an air outlet opening 27.
  • the air outlet 1 For the operation of the air outlet 1, it is installed in a corresponding installation opening in a ceiling or in a wall of a room to be ventilated, the outer sides of the two installation opening cover webs 12 passing approximately flush into the installation wall.
  • a supply air flow 30 supplied to the air outlet 1 enters the air passage 26 for the most part (80% to 90%) and exits the air outlet opening 27 in the direction dependent on the air guide roller position for room ventilation (main air flow 28).
  • the remaining portion (20% to 10% of the supply air quantity) passes through the sealing air channels 19 and emerges from the sealing air outlet openings 20 in such a way that the sealing air streams 29 thus formed adhere to the housing 3, that is to say to the installation opening cover webs 12 and also to the adjacent installation wall - or create ceiling areas. This is preferably done according to the Coanda effect.
  • the sealing air flows 29 prevent ambient air flowing in laterally (for example by induction) from depositing dirt streaks on the built-in wall or ceiling areas and on the housing 3.
  • FIG. 2 shows a further exemplary embodiment of an air outlet 1, which is designed as a swirl outlet 40. It has a tubular housing 3, which merges into an installation opening cover web 12, which is designed as an end ring 41.
  • a sealing air outlet opening 20, which is designed as an annular slot 42, is located adjacent to the end ring 41.
  • the ring slot 42 is formed by an annular inner wall web 14 together with the tubular housing 3.
  • an annular air guiding element 7 is provided, which leads to the formation of an annular air outlet opening 43 and a circular air outlet opening 44.
  • An air guiding element 45 with swirl blades 46 can be provided in the interior of the housing 3, which give the air flow the desired swirl.
  • FIG. 3 shows a further embodiment of an air outlet, which essentially corresponds to the embodiment of FIG. 1. Reference is therefore made to the details of the description of the exemplary embodiment in FIG. 1.
  • the housing 3 there is formed by profiled strips which receive the air-guiding element 7 by clamping directly between them. No inner wall webs 14 and spacer webs 18 are therefore provided.
  • the air guide element 7 has not only the air outlet opening 27, but also a sealing air outlet opening 20.
  • the sealing air outlet opening 20 is located next to the air outlet opening 27 and is separated by means of a web 51.
  • the air guide element 7 is preferably formed by a plurality of air guide rollers 8 arranged in a row.
  • the web 51 separates the air passage duct 26 from the sealing air duct 19 formed on the air guide element 7.
  • the sealing air flow 29 emerging from the sealing air outlet opening 20 ensures that no contamination can occur on the housing of the air outlet and / or on the adjacent air outlet installation wall or ceiling areas.
  • the air guide not only has a sealing air outlet opening 20, but two sealing air outlet openings 20, between which the air outlet opening 27 is arranged.
  • FIGS. 4-6 each show a top view of various exemplary embodiments of air outlets 1 which are designed as swirl outlets 40. They each have a preferably box-shaped housing which has a base plate 60. The base plate 60 is penetrated by base plate openings 61, each of which is assigned an air guide element 62. Due to the fact that the individual base plate openings 61 form a radial arrangement in each exemplary embodiment of FIGS. 4-6 and the air guiding elements 62 produce an oblique air outlet, a swirl air flow is formed. For this purpose, the air is supplied to the interior of the box-shaped housing and then emerges from the base plate openings 61 under the influence of the air guide elements 62. In conjunction with the associated base plate openings 61, the air guide elements 62 cause the respective air flow to be divided into a main air flow and a sealing air flow.
  • FIG. 7 shows a plan view of an air guide element in the direction of arrow 63 of FIG. 8.
  • FIG. 8 shows a sectional view through the air guide element 62 along the line VIII-VIII in FIG. 7.
  • the air guiding element 62 has an air guiding wall 64 which has a curved region 65, a flat region 66 and an angled region 67. This creates a kind of tub.
  • transverse webs 68 are spaced apart from one another in parallel.
  • the air guide wall 64 and the transverse webs 68 preferably consist of plate-shaped material, in particular sheet metal.
  • the crossbars 68 can be attached to the air guide wall 64 by means of soldering.
  • the air guide element 62 shown in FIG. 7 has four transverse webs 68. However, it is also possible to provide only cross webs 68 on the end face, as only two cross webs 68, or else a larger number. If one considers the exemplary embodiments in FIGS. 4-6, there are various variants, i. that is, air guiding elements 62 with a different number of crossbars 68 can be seen.
  • FIG. 8 shows that there is a receiving slot 69 in each of the transverse webs 68 at a distance, in particular a uniform distance, from the angled region 67 of the air guide wall 64.
  • the width of the receiving slot 69 corresponds to the thickness of the base plate 60.
  • the air guide element 62 can be attached to the base plate 60 by a simple plug-in fastening. For this purpose, it is fed to the base plate opening 61 in such a way that an edge region 70 of the base plate opening 61 enters the receiving slot 69. This can preferably create a press fit.
  • a sealing air channel 19 is formed between the edge area 70 of the base plate 60 and the angled area 67 of the air guide wall 64.
  • This has a sealing air outlet opening 20 at its end.
  • the base plate opening 61 is thus divided into two areas by the air guide wall 64 of the air guide element 62, namely into the sealing air outlet opening 20 and into the remaining part, which forms an air outlet opening 27 for the main air flow.
  • the sealing air flow is identified in FIG. 9 with the reference number 29 and the main air flow with the reference number 28.
  • the receiving slot 69 does not extend as far as the flat region 66 of the air guide wall 64, but keeps a distance from it. Furthermore, the receiving slot 69 or the angled region 67 forms an angle with the flat region 66, in particular an obtuse angle, as a result of which the sealing air flow 29 is influenced in its direction. It emerges in such a way that it lies against the base plate 60 of the housing, preferably according to the Coanda effect. As in the exemplary embodiment shown, the angled region 67 of the air guide wall 64 can also contribute to this.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Air-Flow Control Members (AREA)
EP92116445A 1991-10-02 1992-09-25 Sortie d'air Expired - Lifetime EP0535550B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4132797 1991-10-02
DE4132797A DE4132797C2 (de) 1991-10-02 1991-10-02 Luftauslaß

Publications (2)

Publication Number Publication Date
EP0535550A1 true EP0535550A1 (fr) 1993-04-07
EP0535550B1 EP0535550B1 (fr) 1998-05-06

Family

ID=6441979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92116445A Expired - Lifetime EP0535550B1 (fr) 1991-10-02 1992-09-25 Sortie d'air

Country Status (3)

Country Link
EP (1) EP0535550B1 (fr)
AT (1) ATE165909T1 (fr)
DE (2) DE4132797C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710803A1 (fr) * 1994-10-22 1996-05-08 Howorth Airtech Limited Système d'air propre
GB2500672A (en) * 2012-03-29 2013-10-02 Howorth Air Technology Ltd Clean air apparatus
WO2022070070A1 (fr) * 2020-09-29 2022-04-07 Grada International Nv Diffuseur à tourbillon amélioré

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9310711U1 (de) * 1993-07-17 1993-09-02 Ltg Lufttechnische Gmbh, 70435 Stuttgart Luftauslaß
DE20010135U1 (de) 2000-06-06 2000-08-24 LTG Aktiengesellschaft, 70435 Stuttgart Rohrluftauslass
DE102008030111A1 (de) 2008-06-27 2009-12-31 Pluggit International B.V. Luftauslass
DE102012006339A1 (de) 2012-03-28 2012-11-08 Daimler Ag Luftauslass, insbesondere für einen Kraftwagen
DE102012018640A1 (de) 2012-09-11 2014-04-03 Ltg Aktiengesellschaft Luftauslass sowie Verfahren zur Herstellung des Luftauslasses
DE202012009059U1 (de) 2012-09-11 2012-10-24 Ltg Aktiengesellschaft Luftauslass
AT514377B1 (de) * 2013-05-16 2018-06-15 Siemens Ag Oesterreich Luftauslaß
DE102015116242B3 (de) 2015-09-25 2016-09-22 Dr. Schneider Kunststoffwerke Gmbh Luftausströmer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2216501B1 (de) * 1972-03-29 1973-09-27 Gebrueder Sulzer Ag, Winterthur (Schweiz) Luftaustrittsorgan
DE2804670B1 (de) * 1978-02-03 1979-06-13 Klaus Daniels Luftauslass

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8907750U1 (de) * 1989-06-24 1990-07-26 Kessler & Luch Gmbh, 6300 Giessen Luftauslaß für Lüftungsanlagen
DE9100290U1 (de) * 1991-01-11 1991-04-04 Ltg Lufttechnische Gmbh, 7000 Stuttgart Luftauslaß zum Einblasen von Zuluft in einen Raum

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2216501B1 (de) * 1972-03-29 1973-09-27 Gebrueder Sulzer Ag, Winterthur (Schweiz) Luftaustrittsorgan
DE2804670B1 (de) * 1978-02-03 1979-06-13 Klaus Daniels Luftauslass

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710803A1 (fr) * 1994-10-22 1996-05-08 Howorth Airtech Limited Système d'air propre
US6110244A (en) * 1994-10-22 2000-08-29 Howorth Airtech Limited Clean air system
GB2500672A (en) * 2012-03-29 2013-10-02 Howorth Air Technology Ltd Clean air apparatus
GB2500672B (en) * 2012-03-29 2016-08-24 Howorth Air Tech Ltd 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
WO2022070070A1 (fr) * 2020-09-29 2022-04-07 Grada International Nv Diffuseur à tourbillon amélioré
BE1028647B1 (nl) * 2020-09-29 2022-04-25 Grada Int Nv Verbeterd wervelrooster

Also Published As

Publication number Publication date
DE59209316D1 (de) 1998-06-10
DE4132797C2 (de) 1999-10-07
EP0535550B1 (fr) 1998-05-06
DE4132797A1 (de) 1993-04-08
ATE165909T1 (de) 1998-05-15

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