DK161348B

DK161348B - Air distributor

Info

Publication number: DK161348B
Application number: DK024786A
Authority: DK
Inventors: Juhani Laine; Tapio Paananen
Original assignee: Rc Linja Ky
Priority date: 1985-01-28
Filing date: 1986-01-17
Publication date: 1991-06-24
Also published as: NO157393B; DK24786D0; NO860296L; FI850360A0; SE8600353D0; FI70320C; NO157393C; SE457475B; DK24786A; SE8600353L; FI70320B; FI850360A

Description

DK 161548BDK 161548B

Denne opfindelse vedrører en luftfordeler, som er beregnet til at sluttes til et luftskiftesystem og til at fungere 5 som en tryksænkningsindretning med et perforeret indløbsrør, som omgives af et luftfordelingskammer med luftåbninger til lokalet, som skal ventileres.This invention relates to an air distributor which is intended to be connected to an air change system and to act as a pressure lowering device with a perforated inlet pipe surrounded by an air distribution chamber with air openings for the room to be ventilated.

Indledning af luft til et rum bør for at undgå træk så vidt 10 muligt ske jævnt, også når indløbsluften er afkølet på maskinel måde, og indløbsluftindretningen på grund af rummets højde eller mellemloftets konstruktion skal monteres såkaldt frit mindst 300 mm fra en sammenhængende loftsflade, og hvor "Coanda"-effekten ikke virker i forbindelse med 15 indblæsningen. "Coanda"-effekten indebærer, at den indkommende luftstrøm udbreder sig jævnt langs inderloftets flade.In order to avoid drag as far as possible, air to a room should be even, even when the inlet air is cooled in a mechanical manner and the inlet air device due to the height of the room or the middle air structure must be mounted so-called freely at least 300 mm from a continuous ceiling surface, and where the "Coanda" effect does not work in connection with the blow-in. The "Coanda" effect means that the incoming air flow spreads evenly along the interior air surface.

Desuden er det et aktuelt energisparekrav, at den indkom-20 mende luftmængde ikke må overstige det, som rummets varme-belastning til enhver tid kræver.In addition, it is a current energy-saving requirement that the incoming air volume must not exceed what the room's heat load requires at all times.

For at løse de ovennævnte problemer er der opfundet en luftfordeler, som ikke behøver bæreflade fra mellemloftet, 25 og hvor indblæsningshastigheden kan være meget lav. Det er kendetegnende for en luftfordeler ifølge opfindelsen , at det perforerede indløbsrør er forlænget gennem luftfordelingskammeret således, at hullerne ved rørets kappe peger til siden, og at rørets ende er tilsluttet til i og for sig 30 kendte trykmålingskamre. Ved opfindelsens hjælp får man luftstrømmen, som udblæses, fra rørets hul, til at fungere som en bærestråle for den fra indløbsluftindretningens luftfordelingskammer med lav hastighed udstrømmende luftstrøm .To solve the aforementioned problems, an air distributor has been invented which does not need a carrier surface from the intermediate ceiling, and the supply air flow rate can be very low. It is characteristic of an air distributor according to the invention that the perforated inlet pipe is extended through the air distribution chamber so that the holes at the casing of the pipe point to the side and that the end of the pipe is connected to known pressure measuring chambers per se. By means of the invention, the air flow which is blown out of the pipe hole is made to act as a support beam for the air flow chamber of the inlet air device with a low velocity flowing air.

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DK 161348 BDK 161348 B

22

Det er kendetegnende for en fordelagtig udførelsesform af opfindelsen, at antallet af huller, som fører til luftfordelingskammeret, eller deres overflade er ca. to gange så stor som antallet af huller eller deres overflade udenfor 5 luftfordelingskammeret. Prøver har vist, at man med en sådan indretning får både en passende luftstrømning fra luftfordelingskammeret og en tilstrækkelig høj strømningshastighed for bærestrålerne.It is characteristic of an advantageous embodiment of the invention that the number of holes leading to the air distribution chamber or their surface is approx. twice the number of holes or their surface outside the air distribution chamber. Tests have shown that such a device provides both an adequate air flow from the air distribution chamber and a sufficiently high flow rate for the carrier jets.

10 Det er kendetegnende for en anden fordelagtig udførelsesform af opfindelsen, at luftfordelingskammerets luftåbningers antal og størrelse er indrettet således, at luftens udstrømningshastighed på ydersiden er ca. halvdelen af hastigheden af den luft, som strømmer ud fra rørets huller.It is characteristic of another advantageous embodiment of the invention that the number and size of the air distribution chamber's air openings are arranged such that the air flow velocity on the outside is approx. half the velocity of the air flowing out of the pipe holes.

15 Således fås både en passende indløbsluftmængde og bærestråle.Thus, both a suitable inlet air quantity and carrier jet are obtained.

Opfindelsen beskrives i det følgende ved hjælp af et eksempel ved at henvise til vedlagte tegning, som viser luftfor-20 deleren delvis i tværsnit.The invention will now be described by way of example with reference to the accompanying drawings, which show the air distributor partially in cross section.

Luftfordeleren er beregnet til at sluttes til et luftskif-tekanalsystem 1, og til at fungere som en tryksænkningsindretning med et perforeret indløbsrør 2, som omgives af et 25 luftfordelingskammer 3 med luftåbninger 4 til lokalet, som skal ventileres. Det perforerede indløbsrør 2 er forlænget gennem luftfordelingskammeret 3 således, at hullerne 5 ved rørets kappe peger mod siden. Rørets 2 ende er tilsluttet til f.eks. i og for sig kendte trykmålingskamre 6, 7, med 30 hvilke trykket, som råder inden i og uden for røret 2, stadig er under måling. Antallet af huller 8, som fører til luftfordelingskammeret 3, eller deres overflade er ca. to gange større end antallet af huller 5 eller deres overflade udenfor luftfordelingskammeret. Luftfordelingskammerets 3 35 luftåbningers 4 antal og størrelse er sådan, at luftens ud-The air distributor is intended to be connected to an air change duct system 1 and to act as a pressure lowering device with a perforated inlet pipe 2 surrounded by an air distribution chamber 3 with air openings 4 for the room to be ventilated. The perforated inlet pipe 2 is extended through the air distribution chamber 3 so that the holes 5 at the casing of the pipe point to the side. The end of the tube 2 is connected to e.g. known pressure measurement chambers 6, 7, 30, with which the pressure prevailing inside and outside the tube 2 is still under measurement. The number of holes 8 leading to the air distribution chamber 3 or their surface is approx. twice greater than the number of holes 5 or their surface outside the air distribution chamber. The number and size of air distribution chamber 3 35 openings 4 are such that

DK 161348 BDK 161348 B

3 strømningshastighed vx på ydersiden er ca. halvdelen af hastigheden v2 for den luft, som strømmer ud fra rørets huller 5.3 flow velocity vx on the outside is approx. half the velocity v2 of the air flowing out of the holes 5 of the pipe.

Claims

An air distributor intended to be connected to an air change duct system (1) and to act as a pressure lowering device with a perforated inlet pipe (2) surrounded by an air distribution chamber (3) with air openings (4) to the room, which is to be ventilated, characterized in that the perforated inlet pipe (2) is extended through the air distribution chamber so that the holes (5) at the cap of the pipe 10 point to the side and that the end of the pipe (2) is connected to e.g. pressure measurement chambers known per se.

Air distributor according to claim 1, characterized in that the number of holes (8) leading to the air distribution chamber (3) or their surface is approx. twice as large as the number of holes (5) or their surface outside the air distribution chamber.

Air distributor according to claim 1 or 2, characterized in that the number and size of the air openings (4) of the air distribution chamber (3) are arranged so that the air flow velocity (vx) on the outside is approx. half the velocity (v2) of the air flowing out of the holes (5).