SE512255C2 - Apparatus for eliminating vortexing in corners in laminar air flow spaces and use of the apparatus - Google Patents

Apparatus for eliminating vortexing in corners in laminar air flow spaces and use of the apparatus

Info

Publication number
SE512255C2
SE512255C2 SE9102038A SE9102038A SE512255C2 SE 512255 C2 SE512255 C2 SE 512255C2 SE 9102038 A SE9102038 A SE 9102038A SE 9102038 A SE9102038 A SE 9102038A SE 512255 C2 SE512255 C2 SE 512255C2
Authority
SE
Sweden
Prior art keywords
air
corners
laminar
ramp
suction
Prior art date
Application number
SE9102038A
Other languages
Swedish (sv)
Other versions
SE9102038D0 (en
SE9102038L (en
Inventor
Bertil Larsson
Original Assignee
Flaekt Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flaekt Ab filed Critical Flaekt Ab
Priority to SE9102038A priority Critical patent/SE512255C2/en
Publication of SE9102038D0 publication Critical patent/SE9102038D0/en
Priority to AU22912/92A priority patent/AU2291292A/en
Priority to PCT/SE1992/000480 priority patent/WO1993001455A1/en
Publication of SE9102038L publication Critical patent/SE9102038L/en
Publication of SE512255C2 publication Critical patent/SE512255C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
    • B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • F24F3/163—Clean air work stations, i.e. selected areas within a space which filtered air is passed

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lasers (AREA)
  • Ventilation (AREA)
  • Air-Flow Control Members (AREA)

Abstract

In a method of eliminating eddy current formation in the corners of spaces with laminar air flow the corners are covered by an inclined, perforated surface (38) through which air is exhausted or delivered. Apparatus for eliminating such eddy current formation includes an air exhaust or delivery baffle (36) with an inclined, perforated surface, arranged in corners where it is desired to eliminate eddy current formation.

Description

ill.. ill ..

I|I\ ll I mi 512 255 2 Syftet med föreliggande uppfinning är att anvisa en ge- nerellt användbar, enkel anordning för att eliminera vir- velbildning i hörn i utrymmen där man önskar laminär luft- strömning.The object of the present invention is to provide a generally usable, simple device for eliminating vortex formation in corners in spaces where laminar air flow is desired.

Dessa syften uppnås med en anordning enligt patenkravet Avsugnings- eller utblásningsrampen vid anordningen enligt uppfinningen kan vara utformad med plan eller krökt, perforerad yta. I förstnämnda fallet år optimal lutningsvinkel hos ytan 30° - 45° i förhållande till den laminära strömningsriktningen. Ge- nom att använda en krökt yta kan rengöring av rampen underlättas och ytterligare spridning av luft uppnås vid utblåsning av luft genom rampen.These objects are achieved with a device according to the patent claim. The suction or exhaust ramp of the device according to the invention can be designed with a flat or curved, perforated surface. In the former case, the optimal angle of inclination of the surface is 30 ° - 45 ° in relation to the laminar flow direction. By using a curved surface, cleaning of the ramp can be facilitated and further spread of air is achieved by blowing air through the ramp.

Vid anordningen enligt uppfinningen kan rampen användas för eliminering av virvelbildning genom såväl avsugning som utblàs- ning av luft.In the device according to the invention, the ramp can be used for eliminating vortex formation by both suction and exhaust of air.

Såsom exempel valda utföringsformer kommer nu att beskrivas närmare med hänvisning till figurerna 6 och 7.Exemplary embodiments will now be described in more detail with reference to Figures 6 and 7.

.I figurerna 1-5 illustreras, såsom beksrivits ovan, olika exempel på hur man tidiga-re sökt reducera virvelbildning i hörn i utrymmen där laminärt luftflöde önskas, figur 6 visar anordningen enligt uppfinningen använd för att eliminera virvel- bildning vid ett arbetsbord och figur 7 visar anordningen enligt uppfinningen använd för att eliminera virvelbildning vid luft- tillförsel genom taket till ett utrymme.Figures 1-5 illustrate, as described above, various examples of how one has previously sought to reduce vortex formation in corners in spaces where laminar airflow is desired, Figure 6 shows the device according to the invention used to eliminate vortex formation at a work table and Figure 7 shows the device according to the invention used to eliminate vortex formation during air supply through the roof to a space.

I figur 6 visas en laminärflödeskabin 30, som tillförs ett laminärt luftflöde genom kabinens tak 32.Figure 6 shows a laminar flow cabin 30, which is supplied with a laminar air flow through the roof 32 of the cabin.

Inuti kabinen 30 är ett arbetsbord 34 anordnat. Vid bordets 34 ovansida, runt tre av dess kanter är en avsugningsramp 36 med en snedstàlld, perforerad yta 38 anordnad. Hörnen mellan bords- skiva och kabinvägg kommer således att överbryggas av den perfo- rerade ytan 38 genom vilken luft avsugs från utrymmet ovanför arbetsbordet 34. Avsugningsrampen 36 är i sin tur ansluten till, ej visade, anordningar för bortledning av luften. Med denna av- sugningsramp 36 uppnår man effektiv eliminering av luftvirvlar vid arbetsbordets 34 ovansida.Inside the cabin 30 a work table 34 is arranged. At the upper side of the table 34, around three of its edges, a suction ramp 36 with an inclined, perforated surface 38 is arranged. The corners between the table top and the cabin wall will thus be bridged by the perforated surface 38 through which air is extracted from the space above the work table 34. The extraction ramp 36 is in turn connected to devices (not shown) for discharging the air. With this suction ramp 36, efficient elimination of air vortices at the top of the work table 34 is achieved.

I figur 7 visas anordningen enligt uppfinningen använd vid 512 255 3 ett tak genom vilket ett laminärt luftflöde tillförs utrymmet 40 under taket.Figure 7 shows the device according to the invention used at a roof through which a laminar air flow is supplied to the space 40 under the roof.

Genom taket tillförs luft lämpligen genom s k HEPA-filter 42. Hörnomràdet 44 är emellertid av byggnadstekniska skäl ej tillgängligt för lufttillförseln. Detta ger upphov till vir- velbildning i hörnet som stör den laminära luftströmningen i utrymmet 40k Denna virvelbildning kan elimineras med anordningen enligt uppfinningen genom att en luftutblàsningsramp installeras i hörnet mellan taket 42 och väggen 46, sä att rampens snedställ- da, perforerade yta 48 kommer att täcka hörnet. Luftutblásnings- rampen är så utformad och installerad att en viss del av den genom HEPA-filtren 42 utblásta luften leds in i rampen och ut- läses i utrymmet 40 genom den snedställda perforerade ytan 48, varvid man även från hörnomràdet fàr ett huvudsakligen laminärt luftflöde.Air is suitably supplied through the roof through a so-called HEPA filter 42. However, the corner area 44 is not available for the air supply for technical reasons. This gives rise to vortex formation in the corner which interferes with the laminar air flow in the space 40k. This vortex formation can be eliminated with the device according to the invention by installing an air blow-out ramp in the corner between the roof 42 and the wall 46, to cover the corner. The air blow-out ramp is designed and installed in such a way that a certain part of the air blown out by the HEPA filters 42 is led into the ramp and read out into the space 40 through the inclined perforated surface 48, whereby a mainly laminar air flow is obtained from the corner area.

Uppfinningen har beskrivits ovan i samband med tvä till- lämpningar, men tekniken enligt uppfinningen är sàsom nämnts ovan generellt användbar för att eliminera virvelbildning i hörn i utrymmen med laminärt flöde.The invention has been described above in connection with two applications, but the technique according to the invention is, as mentioned above, generally useful for eliminating vortex formation in corners in spaces with laminar flow.

Claims (5)

Mifliifiaflfiizaaaiaàz: 512 255 EatentkrayMi fl ii fi a flfi izaaaiaàz: 512 255 Eatentkray 1. Anordning för att eliminera virvelbildning i hörn i utrym- men med laminär luftströmning, kännetecknad av en avsugnings- eller utblàsningsramp med en mot den laminàra strömningsrikt- ningen snedställd perforerad yta, genom vilken luft avsuges eller utblàses, vilken ramp är anordnad i hörn, där man önskar eliminera virvelbildning sà att rampens snedställda, perforerade yta kommer att täcka nämnda hörn, och utformad så att vid ut- blàsning viss del av i utrymmet utblàst laminärt strömmande luft leds in i rampen och utblàses i utrymmet genom den snedställda perforerade ytan, varvid man även fràn hörnområdet får ett huvudsakligen laminärt luftflöde, och sä att vid avsugning luften sugs ut genom den nämnda hörn överbryggande avsugnings- rampen, varvid virvelbildning invid den till nämnda hörn an- gränsande ytan elimineras.Device for eliminating vortex formation in corners in the spaces with laminar air flow, characterized by a suction or blow-out ramp with a perforated surface inclined towards the laminar flow direction, through which air is extracted or blown out, which ramp is arranged in corners, where it is desired to eliminate vortex formation so that the sloping, perforated surface of the ramp will cover said corners, and designed so that when blowing out a certain part of the air blown out laminarly flowing air is led into the ramp and blown out into the space through the sloping perforated surface, a mainly laminar air flow is also obtained from the corner area, and so that during suction the air is sucked out through the said suction bridge over the said bridge, whereby vortex formation next to the surface adjacent to said corner is eliminated. 2. Anordning enligt patentkrav 1, kännetecknad av att den perforerade ytan är plan och lutar 30-45° i förhållande till den laminàra strömningsriktningen.Device according to claim 1, characterized in that the perforated surface is flat and inclined 30-45 ° in relation to the laminar flow direction. 3. Anordning enligt patentkrav 1, kännetecknad av att den perforerade ytan är krökt.Device according to claim 1, characterized in that the perforated surface is curved. 4. Användning av anordningen enligt patentkrav l för att eliminera virvelbildning vid arbetsbord eller -yta i laminär flödeskabin med lufttillförsel genom kabintaket, kännetecknad av att en avsugningsramp anordnas runt kanterna av bordet eller ytan vid dess ovansida för avsugning av luft.Use of the device according to claim 1 for eliminating vortex formation at work table or surface in laminar flow cabin with air supply through the cabin roof, characterized in that a suction ramp is arranged around the edges of the table or the surface at its upper side for suction air. 5. Användning av anordningen enligt patentkrav l för att eliminera virvelbildning invid hörnen vid taket till ett ut- rymme, som tillförs laminärt luftflöde genom taket, kännetecknad av att i hörnen anordnas en utblàsningsramp, genom vilken en del av den utblàsta, laminärt strömmande luften leds, varvid fàs ett huvudsakligen laminärt luftflöde även fràn hörnområdet.Use of the device according to claim 1 for eliminating vortex formation near the corners at the roof of a space which is supplied with laminar air flow through the roof, characterized in that a blow-out ramp is arranged in the corners, through which part of the blown-out, laminar flowing air is led , whereby a mainly laminar air flow is also obtained from the corner area.
SE9102038A 1991-07-01 1991-07-01 Apparatus for eliminating vortexing in corners in laminar air flow spaces and use of the apparatus SE512255C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9102038A SE512255C2 (en) 1991-07-01 1991-07-01 Apparatus for eliminating vortexing in corners in laminar air flow spaces and use of the apparatus
AU22912/92A AU2291292A (en) 1991-07-01 1992-06-26 Method and means for the elimination of eddies in corners of rooms with laminar air flow and use of said means
PCT/SE1992/000480 WO1993001455A1 (en) 1991-07-01 1992-06-26 Method and means for the elimination of eddies in corners of rooms with laminar air flow and use of said means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9102038A SE512255C2 (en) 1991-07-01 1991-07-01 Apparatus for eliminating vortexing in corners in laminar air flow spaces and use of the apparatus

Publications (3)

Publication Number Publication Date
SE9102038D0 SE9102038D0 (en) 1991-07-01
SE9102038L SE9102038L (en) 1993-01-02
SE512255C2 true SE512255C2 (en) 2000-02-21

Family

ID=20383211

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9102038A SE512255C2 (en) 1991-07-01 1991-07-01 Apparatus for eliminating vortexing in corners in laminar air flow spaces and use of the apparatus

Country Status (3)

Country Link
AU (1) AU2291292A (en)
SE (1) SE512255C2 (en)
WO (1) WO1993001455A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2239508A (en) * 1938-12-15 1941-04-22 Burgess Battery Co Air-distributing apparatus for ventilating systems
US4781108A (en) * 1985-04-26 1988-11-01 Mtd Medical Technology And Development Ltd. Method and means for supplying clean air to an operating room
DE68917871T2 (en) * 1988-06-10 1995-01-12 Halton Oy COLLECTIVE VENTILATION METHOD AND DEVICE OF A WORKPLACE.
GB8828127D0 (en) * 1988-12-02 1989-01-05 Howorth F H Apparatus for providing clean air zone
US5086692A (en) * 1990-04-12 1992-02-11 Welch Henry W Air handling system and method for an operating room

Also Published As

Publication number Publication date
SE9102038D0 (en) 1991-07-01
WO1993001455A1 (en) 1993-01-21
SE9102038L (en) 1993-01-02
AU2291292A (en) 1993-02-11

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