FI95170C

FI95170C - Suspended ceiling structure and method for air flow in connection with a suspended ceiling structure

Info

Publication number: FI95170C
Application number: FI914315A
Authority: FI
Inventors: Pekka Kylloenen
Original assignee: Halton Oy
Priority date: 1991-09-13
Filing date: 1991-09-13
Publication date: 1995-12-27
Also published as: FI95170B; EP0531674A3; EP0531674B1; DE69219540T2; FI914315A; DE69219540D1; JPH05215372A; EP0531674A2; FI914315A0

Description

9517095170

Alakattorakenne ja menetelmä ilman virtauttamiseksi alakattorakenteen yhteydessäSuspended ceiling structure and method for air flow in connection with a suspended ceiling structure

Undertakkonstruktion och förfarande för att ästadkomma en luftström i förbindelse med undertakkonstruktionen 5Undertakings and structures for the construction and operation of the structures 5

Keksinnön kohteena on alakattorakenne ja menetelmä ilman virtauttamiseksi alakattorakenteen yhteydessä.The invention relates to a suspended ceiling structure and a method for flowing air in connection with a suspended ceiling structure.

10 Hakijan aiemmasta FI-kuulutusjulkaisusta 84 096 tunnetaan alakattorakenne, jossa rakenteessa sieppausilmasuihkun avulla estetään ruoanlaittokohteissa syntyneitä epäpuhtauksia kerääntymästä alakattorakenteen yhteyteen ja johdetaan mainitut epäpuhtaudet kattomodulin poistoilmayksikköön. Rakenteessa alakattorakenne käsittää sellaisen alakattorakenteeseen liittyvän tuloilmayksikön, jonka kanava-aukon kautta 15 tuotetaan kantoilma- ja sieppausilmasuihku kohti poistoilmayksikön rasvasuodattimia.10 A suspended ceiling structure is known from the applicant's previous FI publication 84 096, in which a capture air jet prevents contaminants generated in cooking sites from accumulating in connection with the suspended ceiling structure and directs said contaminants to the exhaust air unit of the roof module. In the structure, the suspended ceiling structure comprises a supply air unit associated with the suspended ceiling structure, through the duct opening 15 of which a carrier air and a capture air jet is produced towards the grease filters of the exhaust air unit.

Tässä hakemuksessa on pyritty parantamaan edellä mainittua sieppausilmasuihkun kohdentamista poistoilmayksikköön. Keksinnössä on oivallettu käyttää sellaista kantoilmasuihkua, joka on virtautettu aivan alakattorakenteen kattomodulin tasopinnan 20 myötäisesti kohti poistoilmayksikköä. Näin ollen keksinnössä on oivallettu käyttää ns. Coanda-efektiä, jossa kattomodulipinnan yhteyteen tuotettu ilmasuihku virtaa kattomodulin pintaan tarttuneena tiiviisti pinnan myötäisesti kohti poistoilmayksikköä ja virtauttaa mukanaan alapuolisista ruoanlaittovälineistä syntyneitä epäpuhtauksia ja/tai ylilämpöis-tä ilmaa. Keksinnön mukaisesti käytetään sellaista sieppausilmasuihkun tuottavaa 25 laitetta, josta ilma vapautetaan kattopinnan tasolta ja virtautetaan sen jälkeen kattopinnan tason suuntaisesti. Keksinnön mukaisesti voidaan poistoilmayksikköä kohti suunnatun kantoilmasuihkun nopeutta ja sen heittokuvion muotoa säätää säätölaitteella.This application seeks to improve the above-mentioned targeting of the capture air jet to the exhaust air unit. The invention has realized the use of a carrier air jet which flows directly along the plane 20 of the roof module of the suspended ceiling structure towards the exhaust air unit. Thus, the invention has realized the use of so-called Coanda effect, in which an air jet produced in connection with the surface of the roof module flows, adhering to the surface of the roof module, tightly along the surface towards the exhaust air unit and enters with it impurities and / or superheated air from the cooking utensils below. According to the invention, a device for producing a capture air jet is used, from which air is released from the level of the ceiling surface and then flows parallel to the level of the ceiling surface. According to the invention, the speed of the carrier air jet directed towards the exhaust air unit and the shape of its discharge pattern can be adjusted by a control device.

Keksinnön mukainen säätölaite käsittää ilmakammion, jota rajaavat kaarevat ilmakam-30 mioon rajoittuvat pinnat. Ilmakammioon ilma tuodaan edullisesti tuloilmalaitteen ilmakammiosta, josta tuloilmakammiosta ilma virtautetaan myös erillisen reikäpinnan kautta huonetilaan.The control device according to the invention comprises an air chamber bounded by curved surfaces adjoining the air chamber. The air is preferably introduced into the air chamber from the air chamber of the supply air device, from which air the air also flows into the room through a separate perforated surface.

95170 295170 2

Ilma virtautetaan säätölaitteen ilmakammiosta ulos kaarevan ilmanohjauspinnan ja säätökappaleen kaarevan ilmanohjauspinnan välistä siten, että kammiolevyn kaareva pinta ohjaa ilman virtaamaan välittömästi kattomodulin kattopinnan tasolta kattopinnan tason suuntaisesti kohti poistoilmayksikköä. Keksinnön mukaisesti muodostuu ilmakam-5 miossa liikutettava säätökappale nokkaosasta, jonka kärki on sovitettu liikkumaan kammiota rajoittavan kammiolevyn kaarevan sisäpinnan myötäisesti. Nokkaosan kärkeen liittyy kaareva ilman virtauspinta. Säätökappale on sovitettu olemaan käsin pyöritettävissä pyörityslaakerien varassa laakerin ja ilmakammion keskipisteen O ympäri. Säätökappale on sovitettu sijaitsemaan siten pyörityslaakerin vastakappaleessa, 10 että se sijaitsee pyörityslaakerin keskipisteen O sekä pyörityslaakerin kammiolevyyn rajoittuvan pinnan välisellä alueella säätökappaleen nokkaosan sivutessa kammiolevyn kaarevaa sisäpuolista ilmanohjauspintaa.Air flows out of the air chamber of the control device between the curved air guide surface and the curved air guide surface of the control body so that the curved surface of the chamber plate directs air to flow immediately from the ceiling surface of the roof module parallel to the ceiling surface towards the exhaust air unit. According to the invention, the adjustable body movable in the air chamber 5 consists of a cam part, the tip of which is adapted to move along the curved inner surface of the chamber plate delimiting the chamber. A curved air flow surface is associated with the tip of the cam portion. The adjusting piece is adapted to be manually rotatable on rotating bearings around the center O of the bearing and the air chamber. The adjusting body is adapted to be located in the counterpart of the rotating bearing 10 so as to be located in the area between the center O of the rotating bearing and the surface adjoining the rotating bearing chamber plate, the cam portion of the adjusting body flanking the curved inner air guide surface.

Keksinnön mukaiselle alakattorakenteelle on pääasiallisesti tunnusomaista, että alakatto-15 rakenne käsittää sellaisen tuloilmayksikön, jonka kotelorungon sisälle sieppausil-masuihkun ilmavirtauksen purkuaukon tuntumaan säätölaite on sovitettu, jolloin säätölaitteen avulla voidaan säätää poistoilmayksikön kantoilmasuihkun nopeus ja sen heittokuvion muoto siten, että kantoilmasuihku yltää aina tehollisena poistoilmayksikön rasvasuodatti m ille.The suspended ceiling structure according to the invention is mainly characterized in that the suspended ceiling structure 15 comprises a supply air unit inside the housing body of which the control air m ille.

2020

Keksinnön mukaiselle menetelmälle ilman virtauttamiseksi alakattorakenteen yhteydessä on pääasiallisesti tunnusomaista, että menetelmässä säädetään poistoilmayksikköä kohti suunnatun kantoilmasuihkun nopeutta ja sen heittokuvion muotoa säätölaitteella.The method according to the invention for flowing air in connection with a suspended ceiling structure is mainly characterized in that the method controls the speed of the carrier air jet directed towards the exhaust air unit and the shape of its discharge pattern by means of a control device.

25 Keksintöä selostetaan seuraavassa viittaamalla kuvioissa esitettyihin keksinnön eräisiin edullisiin suoritusmuotoihin, joihin keksintöä ei ole tarkoitus kuitenkaan yksinomaan rajoittaa.The invention will now be described with reference to some preferred embodiments of the invention shown in the figures, to which, however, the invention is not intended to be exclusively limited.

Kuviossa IA on esitetty yleiskuvanto keksinnön mukaisesta menetelmästä ja laiterat-30 kaisusta.Figure 1A shows an overview of the method and apparatus according to the invention.

3 951703,95170

Kuviossa IB on esitetty säätölaite sivukuvantona ja poikkileikkauskuvantona.Fig. 1B shows the adjusting device in a side view and a cross-sectional view.

Kuviossa 2 on esitetty säätölaite aksonometrisena esityksenä ennen osien kokoonpanoa.Figure 2 shows the adjusting device in an axonometric representation before assembling the parts.

5 Kuviossa 3A on esitetty säätölaite koottuna ja eräässä säädön suoritusmuodossa kuviossa 3B on esitetty kuvion 3A suoritusmuotoon liittyvä kantoilmasuihkukuvio.Fig. 3A shows the control device assembled, and in one embodiment of the control, Fig. 3B shows a carrier air jet pattern related to the embodiment of Fig. 3A.

Kuviossa 4A on esitetty säätölaitteen säätökappaleen toinen säätöasento.Fig. 4A shows a second adjusting position of the adjusting piece of the adjusting device.

10 Kuviossa 4B on esitetty kuvion 4A säätökappaleen asentoon liittyvä kantoilmasuihkun virtauskuvio.Fig. 4B shows a flow pattern of the carrier air jet associated with the position of the control member of Fig. 4A.

Kuviossa IA esitetysti tuodaan raitista tuloilmaa Lj huonetilaan H tuloilmalaitteen 11 kautta. Tuloilmakanavasta 12 ilma virtautetaan tuloilmayksikön 11 tuloilmakammioon 15 13, jota rajaa kotelorunko 14. Ilma virtautetaan tuloilmakammiosta 13 kanava-aukon 15 kautta kantoilmasuihkuna Lla kohti poistoilmalaitteen 18 rasvasuodattimia 21.As shown in Fig. 1A, fresh supply air Lj is introduced into the room H via the supply air device 11. From the supply air duct 12, air flows into the supply air chamber 15 13 of the supply air unit 11, which is delimited by the housing body 14. Air flows from the supply air chamber 13 through the duct opening 15 as a carrier air jet Lla towards the grease filters 21 of the exhaust air device 18.

Poistoilmayksikkö 18 käsittää poistoilmakammion 19, jota rajaa poistoilmakammion kotelo 23. Kotelo 23 käsittää poistoilmavirtaukselle L2 aukon 20, joka avautuu 20 kotelorakenteen sisäiseen poistoilmakammioon 19. Aukon 20 yhteydessä sijaitsee rasvasuodatin 21. Poistoilma-aukko 20 sijaitsee kotelon 23 viistolla pinnalla 24. Ilmavirtaus johdetaan edelleen kuviossa esitetysti kotelomaisen poistoilmakammion poistoilmakanavaan 22. Ilmavirtaus johdetaan edelleen poistoilmakanavan 22 kautta ulos rakenteen yhteydestä.The exhaust air unit 18 comprises an exhaust air chamber 19 defined by the exhaust air chamber housing 23. The housing 23 comprises an opening 20 for the exhaust air flow L2 which opens into the internal exhaust air chamber 19 of the housing structure 20. In connection with the opening 20 there is a grease filter 21. The exhaust air opening 20 is located on the inclined surface 24. as shown in the exhaust air duct 22 of the housing-like exhaust air chamber. The air flow is further led out of the connection of the structure through the exhaust air duct 22.

2525

Kuviossa IA esitetysti on sekä tuloilmayksikkö 11 että poistoilmayksikkö 18 tuettu varsinaiseen kattorakenteeseen C. Tuloilmayksikön 11 ja poistoilmayksikön 18 välisellä alueella L sijaitsee varsinaisen kattorakenteen C alapuolella alakattolevy 25. Alakattolevy 25 lepää tuloilmayksikön 11 ja poistoilmayksikön 18 varassa. Alakattolevyn 25 päälle 30 on sovitettu laitteet muille teknisille varustuksille, kuten esim. sähkövienneille. Ilman virtaus kantoilmasuihkuna Lla tapahtuu alakattolevyn 25 tuntumassa. Sieppausilmasuih- 95170 4 kun Lla avulla suunnataan keittiön ruoanlaittovälineistä ylös nousseet epäpuhtaudet suoraan suodattimiin 21. Sieppausilmasuihkun Lla avulla estetään siten epäpuhtauksien kasaantuminen tuloilmayksikön 11 ja poistoilmayksikön 18 välisellä alueella alakattole-vyn 25 tuntumaan.As shown in Fig. 1A, both the supply air unit 11 and the exhaust air unit 18 are supported on the actual roof structure C. In the area L between the supply air unit 11 and the exhaust air unit 18 there is a suspended ceiling plate 25 below the actual roof structure C. The suspended ceiling 25 rests on the supply air unit 11 and the exhaust air unit 18 On top of the suspended ceiling plate 25, devices are arranged for other technical equipment, such as, for example, electrical exports. The flow of air as a carrier air jet Lla takes place near the suspended ceiling plate 25. The trapping air jet 95170 4 when the contaminants raised from the kitchen cooking utensils are directed directly to the filters 21 by means of the trapping air The trapping air jet Lla thus prevents the accumulation of contaminants in the area between the supply air unit 11 and the exhaust air unit 18 near the suspended ceiling 25.

55

Kuviossa IA esitetysti virtautetaan ilmaa huonetilaan H tuloilmayksikön 11 toisen kanava-aukon 16 kautta suoraan alaspäin nuolella Llb esitetysti. Reikälevyn 17 avulla saadaan riittävän alhainen virtausnopeus ilmavirtaukselle Llb. Näin estetään vedon tunne keittiötilassa H työskentelevän keittiöhenkilökunnan oleskeluvyöhykkeellä. 10 Keittiötilasta H poistetaan poistoilmalaitteen 18 poistoilmakanavien 22 kautta poistoilma-virtaus nuolella L2 esitetysti, joka virtaus muodostuu kantoilmasuihkusta Lla sekä sen mukaansa vetämästä epäpuhtaasta ilmavirtauksesta L3.As shown in Fig. 1A, air flows into the room H through the second duct opening 16 of the supply air unit 11 directly downwards as shown by the arrow L1b. The perforated plate 17 provides a sufficiently low flow rate for the air flow L1b. This prevents the feeling of traction in the living area of the kitchen staff working in kitchen space H. From the kitchen space H, the exhaust air flow through the exhaust air ducts 22 of the exhaust air device 18 is removed as indicated by the arrow L2, which flow consists of the carrier air jet L1a and the impure air flow L3 drawn by it.

Keksinnön mukainen rakenne on modulimainen käsittäen useita eri vakioleveyksiä 15 alakattolevylle 25. Näin ollen voidaan kunkin tilan tarpeiden mukaan muodostaa erilainen alakattorakennejäijestys. Näin ollen tuloilmayksiköiden ja poistoilmayksiköi-den välinen etäisyys on voitu valita halutuksi ja tilan vaatimusten mukaan.The structure according to the invention is modular, comprising several different constant widths 15 for the suspended ceiling plate 25. Thus, according to the needs of each space, a different arrangement of suspended ceiling structures can be formed. Thus, the distance between the supply air units and the exhaust air units can be selected as desired and according to the requirements of the space.

Kuviossa IB esitetysti käsittää laitteisto säätölaitteen 26, jonka avulla voidaan säätää 20 sieppausilmasuihkua Lla. Säätölaite 26 on sovitettu tuloilmayksikön 11 tuloilmakammi-on 13 yhteyteen siten, että ilma virtaa tuloilmakammiosta 13 säätölaitteen 26 ilmakam-mioon E. Ilmakammion E rajaavat kaarevat kammiolevyt 27a ja 27b. Ilmakammioon E on sovitettu säätökappale 28. Se on sovitettu kääntymään ilmakammiossa E haluttuun asemaan niin, että se saadaan eri peittoasemiin raon D suhteen. Säätökappaletta 28 25 liikutetaan laakerivälinein 29 (kuvio 2). Säätökappale 28 on liitetty laakerivälineeseen 29 siten, että säätökappale 28 sijaitsee ilmanjakokammiossa E epäkeskeisesti kammion keskipisteeseen O nähden. Säätökappale 28 sijaitsee siten kammion keskipisteen O sekä kaarevan kammiota E rajaavan kammiolevyn 27a,27b sisäpinnan F välisellä alueella. Säätökappaleen 28 nokkaosa 30 sijaitsee kammiolevyn 27a,27b sisäpinnan F tuntumas-30 sa.As shown in Fig. 1B, the apparatus comprises a control device 26 by means of which 20 capture air jets 11a can be controlled. The control device 26 is arranged in connection with the supply air chamber 13 of the supply air unit 11 so that air flows from the supply air chamber 13 to the air chamber E of the control device 26. The air chamber E is bounded by curved chamber plates 27a and 27b. A control piece 28 is arranged in the air chamber E. It is arranged to turn in the air chamber E to the desired position so that it is brought to different covering positions with respect to the gap D. The adjusting piece 28 25 is moved by bearing means 29 (Fig. 2). The adjusting body 28 is connected to the bearing means 29 so that the adjusting body 28 is located in the air distribution chamber E eccentrically with respect to the center O of the chamber. The adjusting body 28 is thus located in the area between the center O of the chamber and the inner surface F of the curved chamber plate 27a, 27b delimiting the chamber E. The cam portion 30 of the adjusting member 28 is located in the feel of the inner surface F of the chamber plate 27a, 27b.

5 951705,95170

Nokkaosaan 30 liittyy kaareva ilmavirtauksen ohjauspinta 31, jolloin ilmavirtaus kammiosta E ulos tapahtuu säätökappaleen 28 ilmavirran kaarevan ohjauspinnan 31 sekä kammiolevyn 27a kaarevan sisäpinnan myötäisesti.The cam portion 30 is associated with a curved airflow guide surface 31, whereby the airflow out of the chamber E occurs along the curved airflow guide surface 31 of the control body 28 and the curved inner surface of the chamber plate 27a.

5 Kammiolevyn 27a ja kammiolevyn 27b välillä on ulosvirtausrako D, joka sijaitsee alakattolevyn 25 tasossa T. Ilma poistuu kammiosta E kammiolevyn 27a rakoon D rajoittuvan pintaosan 27a’ myötäisesti ja virtaa siten alakattolevyn 25 pintatasaon 25’ tuntumaan ja edelleen alakattolevyn 25 tason T suuntaisesti.Between the chamber plate 27a and the chamber plate 27b there is an outflow gap D located in the plane T of the suspended ceiling plate 25. Air exits the chamber E along the surface portion 27a 'bordering the chamber D of the chamber plate 27a and thus flows near the surface plane 25' of the suspended ceiling plate 25 and further along the plane T of the suspended ceiling plate 25.

10 Kuviossa 2 on esitetty säätölaite 26 osittaiskuvantona, aksonometrisena esityksenä ja ennen säätölaitteeseen 26 liittyvien osien kokoonpanoa. Säätölaite 26 käsittää päätykappaleen 32, jossa laakerivälineiden 29 vastalaakeriosa 29a sijaitsee. Vastalaa-keriosa 29a muodostuu osan 32 pintatasosta S ulkonevasta laipasta 33, joka on edullisesti ympyrälaippa. Laipan 33 sivupinnan G ympärille asetetaan laakerivälineiden 29 15 vastalaakeriosa 29b. Vastalaakeriosa 29b on kierrettävissä pinnan G ohjaamana keskipisteen O ympäri haluttuun kulma-asemaan. Laakerin keskiö sijaitsee pisteessä O (kuvio IB). Vastalaakeriosa 29b käsittää pintatasosta S’ ulkonevan laippaosan 34, joka on edullisesti myös ympyrälaippa. Laippaosan 34 ympärille asetetaan säätökappale 28 päädystään. Ympyrälaippa 34 käsittää ohjauskolot P,,P2,P3, joihin säätökappaleen 20 28 ohjausnystyrät P1’,P2’,P3’ asettuvat ja pitävät siten säätökappaleen 28 tarkassa asemassa laakerivälineiden 29 vastalaakeriosan 29b suhteen.Figure 2 shows the control device 26 in a partial view, in an axonometric view and before the assembly of the parts associated with the control device 26. The adjusting device 26 comprises an end piece 32 in which the counter-bearing part 29a of the bearing means 29 is located. The counter-coil part 29a consists of a flange 33 projecting from the surface plane S of the part 32, which is preferably a circular flange. A counter-bearing part 29b of the bearing means 29 15 is placed around the side surface G of the flange 33. The counter bearing part 29b is rotatable, guided by the surface G, around the center O to the desired angular position. The center of the bearing is located at point O (Fig. IB). The counter-bearing part 29b comprises a flange part 34 projecting from the surface plane S ', which is preferably also a circular flange. An adjusting piece 28 is placed around the flange part 34 at its end. The circular flange 34 comprises guide cavities P1, P2, P3 in which the guide knobs P1 ', P2', P3 'of the adjusting member 20 28 are positioned and thus hold the adjusting member 28 in a precise position with respect to the counter bearing portion 29b of the bearing means 29.

Kuviossa esitetysti käsittää säätölaite 26 lisäksi kaarevat kammiolevyt 27a,27b, jotka ovat ruuvein R kiinnitettävissä laakerivälineiden 29 vastakappaleosan 29a runkolevyyn 25 35.As shown in the figure, the adjusting device 26 further comprises curved chamber plates 27a, 27b, which can be fastened with screws R to the body plate 25 35 of the counterpart part 29a of the bearing means 29.

. Kuviossa 2 on esitetty ainoastaan säätölaitteen 26 toinen pääty. Säätölaitteen 26 toinen pääty on laakeroitu vastaavin välinein ja säätökappale 28 on kiinnitetty vastaavin välinein laakerivälineisiin 29 kuin toinenkin pääty.. Figure 2 shows only the other end of the control device 26. One end of the adjusting device 26 is mounted by corresponding means and the adjusting body 28 is fixed to the bearing means 29 by similar means as the other end.

30 95170 6 Näin ollen sieppausilmasuihkua Lla säädettäessä säätökappale 28 kiinnittyessään laakerivälineiden 29 laakeriosuuteen 29b on kierrettävissä mainittuja laakerivälineitä kiertämällä (nuoli N) haluttuun asemaan kammiolevyjen 27a,27b välisessä ilmakam-miossa E.Thus, when adjusting the capture air jet 11a, the adjusting member 28, while engaging the bearing portion 29b of the bearing means 29, can be rotated by rotating said bearing means (arrow N) to the desired position in the air chamber E between the chamber plates 27a, 27b.

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Kuviossa 3A on esitetty säätökappale 28 ohuen sieppausilmasuihkun Lla toteuttavassa asemassa. Ilma tulee nuolilla M esitetysti tulokammioon E kammiolevyjen 27a,27b väliseen tilaan ja virtaa edelleen säätökappaleen 28 ja kammiolevyn 27a välistä raosta D’ kammiolevyn 27a päätypinnan 27a’ ohjaamana alakattolevyn 25 pintatasolle 25’ ja 10 virtaa alakattolevyn 25 tason T suuntaisesti kohti poistoilmayksikköä.Fig. 3A shows the adjusting body 28 in the position implementing the thin capture air jet 11a. Air enters the inlet chamber E as indicated by the arrows M in the space between the chamber plates 27a, 27b and further flows from the gap D 'between the control piece 28 and the chamber plate 27a under the end face 27a' of the chamber plate 27a to the surface 25 'of the suspended ceiling 25.

Kuviossa 3B on esitetty kuvion 3A säätökappaleen 28 asentoa vastaava sieppausilmasuihkun Lla virtauskuvio. Säätölaitteella 26 on aikaansaatu on ohut ilmavirtaus aivan alakattorakenteen 25 pintatason 25’ tuntumaan.Fig. 3B shows a flow pattern of the capture air jet Lla corresponding to the position of the control body 28 of Fig. 3A. The control device 26 provides a thin air flow just in the vicinity of the surface plane 25 'of the suspended ceiling structure 25.

1515

Kuviossa 4A on esitetty säätökappaleen 28 toinen säätöasento, jossa säätökappaletta 28 on käännetty kuviossa esitetysti myötäpäivään ja jossa virtausrako D’ säätökappaleen 28 ilman ohjauspinnan ja kammiolevyn 27a sisäpinnan välistä on suurempi kuin kuvion 4A säätöasennossa. Kuviossa 4B esitetysti tuotetaan paksumpi ilmavirtaussuihku 20 kohti poistoilmalaitteen 18 rasvasuodattimia 21.Fig. 4A shows a second adjusting position of the adjusting member 28, in which the adjusting member 28 is rotated clockwise as shown in the figure, and in which the flow gap D 'between the air guide surface of the adjusting member 28 and the inner surface of the chamber plate 27a is larger than in the adjusting position of Fig. 4A. As shown in Figure 4B, a thicker air flow jet 20 is produced towards the grease filters 21 of the exhaust air device 18.

Keksinnön mukaisessa menetelmässä ilma virtautetaan ensin kammiolevyjen 27a,27b väliseen tilaan E ja mainitusta tilasta E säätökappaleen 28 ilman kaarevan ohjauspinnan 31 sekä kammiolevyn 27a tai 27b sisäpinnan F välisestä virtaustiestä D’ raon D kautta 25 alakattolevyn 25 pintatason 25’ tuntumaan ja edelleen alakattolevyn 25 tason T suuntaisesti kohti poistoilmalaitetta 18. Ilma virtaa siten jouhevasti säätökappaleen 28 kaarevan ohjauspinnan 31 ja kammiolevyn 27a tai 27b kaarevan ilman ohjauspinnan F välisessä virtaustiessä D’. Ilma suunnataan kammiolevyn 27a kaarevan päätyosan 27a’ kautta rakoon D ja edelleen alakattolevyn 25 pintatason 25’ tuntumaan. Raon D virtausaukko 30 sijaitsee tasoltaan S olennaisesti alakattolevyn 25 tason T suuntaisesti. Keksinnön mukaisessa menetelmässä säädetään kantoilmasuihkun Lla virtausta säätämällä il IK t K lii I i H» : i 7 95170 säätökappaleen 28 kaarevan ohjauspinnan 31 sekä kammiolevyn 27a tai 27b välistä etäisyyttä pyörittämällä säätökappaletta 28.In the method according to the invention, air first flows into the space E between the chamber plates 27a, 27b and from said space E between the air curved guide surface 31 and the inner surface F of the control plate 28 and the inner surface F of the chamber plate 27a or 27b through the gap D 25 to the surface 25 'of the suspended ceiling 25 parallel to the exhaust air device 18. The air thus flows smoothly in the flow path D 'between the curved guide surface 31 of the control body 28 and the curved air guide surface F of the chamber plate 27a or 27b. Air is directed through the curved end portion 27a 'of the chamber plate 27a to the slot D and further to the surface plane 25' of the suspended ceiling plate 25. The flow opening 30 of the gap D is located in a plane S substantially parallel to the plane T of the suspended ceiling plate 25. In the method according to the invention, the flow of the carrier air jet Lla is adjusted by adjusting the distance between the curved guide surface 31 of the control body 28 and the chamber plate 27a or 27b by rotating the control body 28.

Claims

1. Ceiling structure (10), which is specially designed for storerooms in large kitchens and is formed of modular units comprising at least one entrance air unit (11) and an exit air unit (18) and a ceiling plate (25) at the area between them and which ceiling structure is designed below. the actual ceiling structure (C) of the room, leaving a free space (E) between the ceiling structure (10) and the room's actual ceiling (C), and the ceiling structure (10) comprising an inlet air duct (12) for the current (Lj) of fresh air introduced into the room, which duct 10 is connected to the casing body (14) which limits the entrance air chamber of the entrance air unit (11), from which the entrance air unit (11) opens at least one flow opening for the air flow entering the room and which substructure comprises an exit air unit (18) comprising a case-shaped body (23) which confines within it an outlet air chamber (19), wherein an opening is opened to the exit air chamber (19) from the room space to the outlet air stream (L 2), which opening comprises grease filter (21) in connection therewith, and wherein the exit air chamber (19) is arranged to be located in the substructure construction above the tools located in the room, and which ceiling structure (10) comprises a ceiling plate (25) to be mounted in a modular form, wherein at least one ceiling plate 20 (25) is arranged at the area between the input air unit (11) and the exit air unit (18), and ceiling structure (10) comprises means producing a take-up air jet (Lla), wherein the air jet can be caused to flow in the direction of the plane (T) of the ceiling plate (25) towards the outlet air opening (20) for the outlet air stream (L2). Lla) draws impure air and / or excess heat or excess moisture (L3) that has risen from the room's 11a against the exit air unit (18), thereby preventing the impurities and / or excess heat and / or excess humidity from being stored at the area between the input air unit (11) and the exit air unit (18) in contact with the ceiling plate (25) of the ceiling structure, characterized in that the roof structure (10) 30 includes such an input air unit (11) inside whose case body (14) the control device (26) is arranged in contact with the outlet opening (D) for the air flow of the take-up air jet (Lla), whereby the control device can be controlled the velocity of the carrier air stream of the outlet air unit and the shape of its discharge pattern in such a way that the carrier air stream always effectively reaches the grease filters (21) of the outlet air unit (18). 5

2. A ceiling structure according to claim 1, characterized in that the ceiling structure (10) comprises such means producing a take-up air jet (Lla), that the outlet opening (D) for its air flow is in contact with the surface plane (25 ') of the ceiling plate (25). ) and that the means producing the receiving air jet (Lla) comprise an air control surface (27a ') which directs the air jet in such a way that it flows in the direction of the plane (T) of the ceiling plate (25) towards the outlet air chamber (19). of the outlet air device (18) and the surface portion (27a ') directing the airflow is connected to a curved chamber disk (27a) which, together with the control piece (28) of the control device (26), limits a flow gap between them therefrom air flows in contact with the ceiling plate (25).

3. A roof structure according to claim 1 or 2, characterized in that there is a control device (26) by means of which the yoke on the control piece (28) of the control device can be controlled in an air chamber (E) which is limited by curved chamber plates (27a). , 27b), to which the air is first flowed and from there the air is flowed further from the location between the control piece (28) and the curved chamber disk (27a) or (27b) in contact with the surface plane (T) of the ceiling plate (25). .

A roof structure according to any preceding claim, characterized in that the control piece (28) at its end comprises bearing means (29) supported by which the control piece (28) can be pivoted in different control positions for producing the desired air flow profile (Lla) via the gap. (D) under the ceiling plate (25).

5. A roof structure according to any of the preceding claims, characterized in that the control piece (28) is arranged in the air space (E) which is limited by the chamber discs (27a, 27b) by the air chamber (E) in such a way that the control piece (28) is located at the region between the center point (0) of the chamber (E) and the inner surface (F) of the chamber disk (27a, 27b) and in such a way that the beak portion (30) of the control piece (28) is in contact with the the inner surface (F) of the chamber plate (27a or 27b).

A ceiling structure according to any of the preceding claims, characterized in that the beak portion (30) of the control device (26) comprises a curved control surface (31) for the air flow, the control surface (31) of the control piece (28) together with the curved inner surface of the lower floor. the chamber plate (27a or 27b) between them forms a flow path (D ') for air, through which one liters of air flow from the gap (D) in contact with the surface plane (25') of the ceiling plate (25) and flow in the direction of the plane (T) of the ceiling plate (25 ').

Ceiling structure according to any of the preceding claims, characterized in that the control device (26) comprises an end piece (32) where the bearing part (29a) 15 of the bearing members (29) is located, the bearing part (29a) consisting of a circular flange (33) which projecting from the surface plane (S) of the portion (32), mounting the bearing portion (29b) of the bearing members (29) around the side surface (G) of the circular flange (33), the bearing portion (24b) being disposed about the side surface (G) of the flange (33).

8. Ceiling structure according to the preceding claim, characterized in that the bearing member (29b) can be rotated in the desired angular position about the center point (O) of the chamber and the bearing and guided by the side surface (G) of the flange (33), wherein the control piece (28) which is attached to the counter bearing part (29b) obtain the desired control positions.

9. Ceiling structure according to the preceding claim, characterized in that the bearing part (29b) comprises a flange part (34) which protrudes from the surface plane (S), which is advantageously a circular flange and wherein the control piece (28) is mounted from the end around the flange part (34). .

Ceiling structure according to any of the preceding claims, characterized in that the chamber discs (21a, 21b) open from both ends, whereby the control device (26) is located in the input air unit (11) on both ends. in such a way that the air chamber (E) of the control device opens to the entrance air chamber (13) of the input air unit (11), producing through the entrance air unit (11) both a take-up air jet (Lla) and a normal fresh air entrance (Llb) of fresh air. participating via a hälytä.

11. A method for letting air flow in communication with a ceiling structure (10), said ceiling structure (10) comprising an entrance air unit (11) and an outlet air unit (18) and a ceiling plate (25) between them and which units (11,18). 10 are mounted below the actual ceiling (C) of the room space (H), leaving a free space between the ceiling structure (10) and the actual ceiling (C) of the room space and which ceiling structure (10) is supported against the actual roof ( C) of the room space and in which method air is allowed to flow through the entrance air unit (11) to the room space (H) in such a way that it is directed from the entrance air unit (11) at a relatively high speed in the direction of the ceiling plane (T) of the ceiling. the disc (25), allowing the air to flow into contact with the surface plane confined to the space by the ceiling plate (25) from a flow gap (D), whose pane is located substantially in the direction of the disc plane (T ) in the ceiling plate (25) and in which method the air is directed directed by the inner surface (F) of a curved chamber plate (25a or 25b) to flow out of the gap (D) in such a manner as to provide a direction for air flow. but in accordance with the disc plane (T) of the ceiling plate (25) already at the stage where the air is removed via the gap (D), characterized in that in the process the speed of the carrier air jet directed towards the outlet air unit and the shape of its throw pattern is controlled by a control device ( 26). 25

Method according to the preceding claim, characterized in that air is allowed to flow through a gap (D) between the curved air control surface (31) of the control piece (28) and the curved inner surface (F) of the chamber disk (27a or 27b) to the room space. (HRS). 30 95170 16

Method according to the preceding claims 11 or 12, characterized in that the flow of the carrier air stream is controlled by controlling the distance between the inner surface of the chamber plate (27a, 27b) and the control surface (31) for the air of the control piece (28). 5

Method according to any of the preceding claims 11-13, characterized in that the distance between the inner surface (F) of the chamber plate (27a or 27b) and the control piece (28) is changed by turning the control piece (28) with the support of the bearing members.

Method according to any of the preceding claims 11-14, characterized in that the air is first flowed (pii M) into the space (E) between the chamber discs (27a, 27b) and from the space (E) via the gap (D). ) in contact with the inner surface of the ceiling plate (25) and flow in the direction of the plane (T) of the ceiling plate (25) towards the exit. Il i IBil DIB I I I M