SE446479B

SE446479B - SUPPLY AIR

Info

Publication number: SE446479B
Application number: SE8100012A
Authority: SE
Inventors: F Sodec; W Veldboer
Original assignee: Krantz H Gmbh & Co
Priority date: 1980-02-14
Filing date: 1981-01-02
Publication date: 1986-09-15
Also published as: NL8006253A; DK7381A; IT8119727A0; DE8003910U1; ES263219U; CH648923A5; DK154175C; SE8100012L; BE886544A; ES263219Y; DK154175B; IT1169201B; AT377844B; ATA555180A; NL188663C; IT8120787V0; NL188663B

Description

446 479 situationer vid vilka en lodrät kärnstråle skulle förorsaka kors- dragsfenomen i uppehållszonen. För kylbelastningssituationer redu- ceras därför proportionen luftstrålsvolym i kärnluftstrålen och detta desto kraftigare ju lägre utsläppsintensiteten är. 446 479 situations in which a vertical core beam would cause cross-drag phenomena in the residence zone. For cooling load situations, the proportion of air jet volume in the nuclear air jet is therefore reduced, and this the more strongly the lower the emission intensity.

Med tilluftsdonet enligt uppfinningen har man möjlighet att automatiskt reglera proportionen kärnström i beroende av temperatur- differensen mellan rumsluft och till-luft.With the supply air device according to the invention, it is possible to automatically regulate the proportion of core current in dependence on the temperature difference between room air and supply air.

I ritningen visas ett utföringsexempel av tilluftsdonet en- _ligt uppfinningen. Fig 1 visar tilluftsdonet i vertikalsektion och fig 2 till 4 visar tilluftsdonet med ventiltallriken placerad i olika lägen.The drawing shows an embodiment of the supply air device according to the invention. Fig. 1 shows the supply air device in vertical section and Figs. 2 to 4 show the supply air device with the valve disc placed in different positions.

Tilluftsdonet består väsentligen av ett ytterrör 1 som i sina inströms- och utströmsändar har avrundningar 2 resp 3 till förstoring av rördiametern. För den avsedda funktionen är avrundningen 2 inte obetingat nödvändig. I Ett innerör 4 är koncentriskt anordnat i ytterröret 1 och på innerörets yttre omkrets sitter åtta vridna skovlar 5 som radiellt sträcker sig över den ringfcrmiga arean mellan ytterröret 1 och inneröret 4. y Inneröret 4 är på utströmssidan försett med en nedre stryp- fläns 6 och har en avrundning 7 i rörets utströmsände till förstoring - av diametern.The supply air device essentially consists of an outer pipe 1 which at its inflow and outflow ends has roundings 2 and 3, respectively, for enlarging the pipe diameter. For the intended function, rounding 2 is not absolutely necessary. An inner tube 4 is concentrically arranged in the outer tube 1 and on the outer circumference of the inner tube are eight rotated vanes 5 which radially extend over the annular area between the outer tube 1 and the inner tube 4. y The inner tube 4 is provided on the outflow side with a lower throttle flange 6 and has a rounding 7 in the outflow end of the pipe to enlarge - the diameter.

I intagsområaet till inner-örat 4 är anordnad en ventiitailrik 8 som genom en inställningsmotor 9 kan införas i inneröret 4 i dess inströmsände. .In the intake area of the inner ear 4 a vent plate 8 is arranged which can be inserted into the inner tube 4 at its inflow end by means of a setting motor 9. .

En ringskiveformad hålplåt 10 sitter på inströmningssidan över den ringformiga arean mellan ytterröret 1 och inneröret 4 och utgör förutsättning för en tillräcklig stödströmsvolym. Givetvis kan hål- plâten även föras med en slidventil eller strypfläns som tillsluter ringarean så att om nödvändigt stödströmsvolymen skall kunna utökas till 100 % av till-luftsvolymen.An annular disc-shaped perforated plate 10 sits on the inflow side over the annular area between the outer tube 1 and the inner tube 4 and constitutes a prerequisite for a sufficient support flow volume. Of course, the perforated plate can also be moved with a slide valve or throttle flange which closes the ring area so that, if necessary, the support flow volume can be increased to 100% of the supply air volume.

Tilluftsdonet enligt uppfinningen kan antingen förbindas med en tilluftkanal eller med hjälp av en luftfördelningsdosa och exem- pelvis ett flexibelt rör anslutas till ett kanalsystem.The supply air device according to the invention can either be connected to a supply air duct or by means of an air distribution box and, for example, a flexible pipe connected to a duct system.

Alltefter anslutningssättet som väljes kommer luften in i donet från anslutningslådan eller direkt från tilluftkanalen. Är arean på inneröret 4 spärrad genom ventiltallriken 8 strömmar till- luften uteslutande över ringarean mellan ytterröret 1 och inneröret 4 och virvias medelst skoviàrna 5. ne därvid rrambragta iuftstrålaif-Depending on the connection method selected, the air enters the device from the connection box or directly from the supply air duct. If the area of the inner tube 4 is blocked by the valve plate 8, the supply air flows exclusively over the ring area between the outer tube 1 and the inner tube 4 and is swirled by means of the vanes 5.

Claims

446 479 na are highly inductive and distinctly turbulent. Rounding 3 achieves a Coanda effect and thus an extra radial rotation of the air jet. The horizontal radial jets thus produced cause a strong mixing of the ambient air and thereby a rapid equalization of the supply air temperature to the temperature of the room air. Depending on the position of the valve plate, a partial volume of air flow of varying size flows through the inner tube 4. In this way, a vertical support jet is formed which overlaps the air jet vortices from the ring area and increases the depth of jet penetration into the space. P a t e n t k r a v:

Supply air diffuser with an outer tube (1) and an inner tube (4) concentrically arranged therein, wherein vortex-forming vanes (5) extend radially through the ring zone between the outside of the inner tube (4) and the inside of the outer tube (1), characterized in that in that an adjustable (actuator 9) valve plate (8) is stored outside the inlet end (7) of the inner tube (4) and can be inserted into the inner tube (4) from this end (7), and has a substantially inner diameter of the inner tube (4) on the inlet side corresponding to the outer diameter, and that the outlet cross-sections of both pipes (1,4) are located on the end sides of the pipes and the outlet cross-section of the ring zone surrounds the outlet cross-section of the inner pipe (4). '

Supply air diffuser according to claim 1, characterized in that the inner pipe (4) has a rounding (7) which increases the diameter at the inlet end of the pipe, and that the outer pipe (1) has a rounding (3) which increases the diameter at the outlet end of the pipe.

Supply air diffuser according to claim 1 or 2, characterized in that a perforated plate (10) is arranged over the inlet side of the ring zone between the two pipes (1,4).