DK168774B1

DK168774B1 - Ventilation apparatus, in particular for stall ventilation

Info

Publication number: DK168774B1
Application number: DK50692A
Authority: DK
Inventors: Ole Knudsen
Original assignee: Dansk Staldindustri A S
Priority date: 1992-04-15
Filing date: 1992-04-15
Publication date: 1994-06-06
Also published as: DK50692D0; DK50692A

Description

DK 168774 B1DK 168774 B1

Opfindelsen angår et loftmonteret ventilationsapparat, navnlig til staldventilation, hvor luften blæses ind i rummet gennem en ringspalte, hvori er arrangeret mindst et sæt ledeplader anbragt parvist parallelle.The invention relates to a ceiling mounted ventilation apparatus, in particular for housing ventilation, in which the air is blown into the room through a ring gap, in which is arranged at least one set of baffles arranged in parallel in pairs.

5 Ventilationsapparater af denne art er blandt andet kendt fra DE-A 20 31 914 og DE-A 27 18 298. Den indblæste luft fra et sådant ventilationsapparat udbreder sig i et cirkulært mønster fra ringspalten og daler efterhånden ned og opblandes med rumluften. I en stald 10 såsom en svine- eller kyllingestald kan der sidde flere sådanne ventilationsapparater på række oppe under loftet med en kastelængde på den indblæste luft afpasset efter staldens bredde. Afhængig af bredden kan der naturligvis være monteret flere rækker ventilationsapparater. Pro-15 blemet ved disse apparater er imidlertid, at indblæs- ningsmønsteret er cirkulært, medens en stald typisk har et rektangulært grundplan, hvorved der ventilationsmæssigt opstår en række døde zoner i stalden med stillestående luft eller kun trægt luftskifte. For-at modvirke 20 dette er der blevet udviklet en type ventilationsapparater, hvor der i stedet for en ringspalte er en dysekrans, så luften i stedet for at udbrede sig som et cirkulært "tæppe" ud fra ventilationsapparatet sendes som enkeltstående luftstråler ud i rummet. Kastelængden 25 kan typisk indstilles individuelt i de enkelte dyser afpasset efter deres afstande til staldvæggene og naboapparater. Et eksempel på et sådant ventilationsapparat er omhandlet i DK-B 116 759.5 Ventilators of this kind are known, inter alia, from DE-A 20 31 914 and DE-A 27 18 298. The blown air from such a ventilator propagates in a circular pattern from the annular gap and gradually descends and is mixed with the room air. In a barn 10, such as a pig or chicken barn, several such ventilators may sit in a row up under the ceiling with a throwing length of the blown air adapted to the width of the barn. Of course, depending on the width, several rows of ventilators may be fitted. The problem with these appliances, however, is that the supply pattern is circular, while a stable typically has a rectangular floor plan, whereby a number of dead zones arise in the stable with stagnant air or only sluggish air change. In order to counteract this, a type of ventilation apparatus has been developed, where instead of a ring gap there is a nozzle ring, so that the air instead of spreading as a circular "blanket" from the ventilation apparatus is sent out as single air jets into the room. The throw length 25 can typically be adjusted individually in the individual nozzles adapted to their distances to the barn walls and neighboring appliances. An example of such a ventilation apparatus is disclosed in DK-B 116 759.

Det er på denne baggrund opfindelsens formål at 30 angive et ventilationsapparat af den førstnævnte art, som ved en ganske enkel udformning er i stand til at udvirke en luftspredning som et tæppe med én i det mindste tilnærmelsesvis rektangulær form.It is, therefore, the object of the invention to provide a ventilation apparatus of the former type which, in a very simple design, is capable of effecting an air diffusion as a blanket of at least approximately rectangular shape.

Dette opnås ifølge opfindelsen ved, at vinkelrummet 35 mellem de parvise ledeplader er underopdelt med radiært anbragte ledeplader. Lufthastigheden i et sæt ledeplader DK 168774 B1 2 er forholdsvis større end lufthastigheden mellem to på hinanden følgende sæt, idet vinkelrummet mellem disse udvider sig udefter med en lavere lufthastighed til følge. Med en passende arrangering af de parvise lede-5 plader, antallet heraf samt underopdeling af vinkelrum met mellem disse med radiært anbragte ledeplader viser det sig overraskende, at man kan opnå et rektangulært indblæsningsmønster.This is achieved according to the invention in that the angular space 35 between the paired baffles is subdivided with radially arranged baffles. The airspeed in a set of baffles DK 168774 B1 2 is relatively greater than the airspeed between two successive sets, the angular space between them extending outwards with a lower airspeed. With a suitable arrangement of the paired guide plates, the number thereof and the subdivision of the angular space between these with radially arranged guide plates, it is surprising that a rectangular blow-in pattern can be obtained.

Det viser sig tillige fordelagtigt at udforme ven-10 tilationsapparatet således, at afstanden ved inderkredsen mellem to parallelt anbragte ledeplader svarer til den frie afstand mellem de hosliggende ledeplader af to på hinanden følgende sæt parallelle plader. Det viser sig at give en overraskende jævn fordeling af luften 15 langs ringspalten.It is also advantageous to design the ventilation apparatus such that the distance at the inner circle between two parallel baffles corresponds to the free distance between the adjacent baffles of two successive sets of parallel plates. It turns out to provide a surprisingly even distribution of air 15 along the annular gap.

En særlig enkel udformning af ventilationsapparatet omfatter fire sæt parallelle ledeplader anbragt med en indbyrdes afstand på 9Oo, og ved samme pladeafstand opnås et kvadratisk indblæsningsmønster. -20 Det er indlysende, at ventilationsapparatet kan udformes, så der samtidig med indblæsning af frisk luft, sker en opblanding med recirkuleret rumluft. I så henseende har en særlig enkel udformning en øverste ringspalte i forbindelse med et friskluftindtag samt en under-25 liggende ringspalte for recirkulering af rumluft, begge forsynet med mindst et sæt fortrinsvis identiske ledeplader. Den recirkulerede rumluft ligger her nederst, som det er at foretrække og bærer den indsugede udeluft oppe, så den dels føres længere ind i rummet, og der 30 dels sker en optimal opblanding med rumluften.A particularly simple design of the ventilation apparatus comprises four sets of parallel baffles spaced apart at 90 DEG, and at the same plate spacing a square supply pattern is obtained. -20 It is obvious that the ventilation apparatus can be designed so that while recirculating fresh air, a mixture of recirculated room air occurs. In this regard, a particularly simple design has a top annular gap in connection with a fresh air intake and an underlying annular recess for room air recirculation, both provided with at least one set of preferably identical baffles. The recirculated room air is located here at the bottom, which is preferable and carries the suctioned outdoor air up, so that it is partly fed further into the room, and an optimal mixing with the room air takes place.

Ventilationsapparatet kan i givet fald tillige forsynes med en central placeret udsugning på i og forsig kendt måde.If necessary, the ventilation apparatus may also be provided with a centrally located suction in a manner well known in the art.

Opfindelsen angår tillige en stald med et i det 35 væsentlige rektangulære grundplan og udstyret med mindst ét ventilationsapparat ifølge det foregående og anbragt DK 168774 B1 3 således i rummet, at sæt af de parallelle ledeplader peger ud mod hvert af rummets hjørner.The invention also relates to a stable with a substantially rectangular floor plan and equipped with at least one ventilation apparatus according to the preceding one and arranged in the room such that sets of the parallel baffles point out towards each of the corners of the room.

I det følgende skal opfindelsen forklares nærmere under henvisning til medfølgende tegning, hvor 5 fig. 1 viser en udførelsesform for et ventilationsapparat ifølge opfindelsen i aksialsnit, og fig. 2 viser den øverste luftfordelerplade set direkte fra oven og med en markering af luftindblæs-10 ningsmønsteret.In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which: FIG. 1 shows an embodiment of a ventilation apparatus according to the invention in axial section, and fig. 2 shows the top air distributor plate seen directly from above and with a marking of the air supply pattern.

Ventilationsapparatet omfatter en rørformet luftkanal 2 beregnet til montering i taget for indtag af friskluft. Den øverste del af kanalen med afdækning er 15 ikke vist. Tegningen viser i øvrigt kun de dele af appa-ratet, der er nødvendige for forståelse af opfindelsen.The ventilation apparatus comprises a tubular air duct 2 intended for mounting in the roof for intake of fresh air. The top of the channel with cover is 15 not shown. Furthermore, the drawing shows only those parts of the apparatus necessary for understanding the invention.

I luftkanalen er der monteret en elmotor 4 med et skovlsæt 6 for indtrækning af friskluft. For enden af luftkanalen 2 er der monteret en karm 8 med en krave, der 20 sammen med en øverste luftfordelerplade 10 danner en ringspalte 12, hvorigennem luften som et lufttæppe indblæses i rummet.In the air duct, an electric motor 4 with a bucket set 6 is provided for drawing fresh air. At the end of the air duct 2 there is mounted a frame 8 with a collar, which 20 together with a top air distributor plate 10 forms a ring slot 12, through which the air is blown into the room as an air blanket.

Fordelerpladen har en forhøjning 16 på midten, der ved siderne flader ud i en vandret kant, der sammen med 25 kanten af kraven 8 danner en vandret ringspalteåbning.The distributor plate has an elevation 16 in the center, which flanks at the sides into a horizontal edge, which together with the 25 edge of the collar 8 forms a horizontal ring gap opening.

På siden af fordelerelementets forhøjning 16 er der et antal lodrette ledeplader anbragt i et bestemt mønster, som det fremgår af fig. 2. Ledepladernes yderkant har form efter indersiden af kraven 8, så de kan sidde op i 30 denne, så der stadigvæk er fri luftpassage mellem ledepladerne. Fordelerpladen 10 er ophængt i luftkanalen 2 på en sådan måde, at den kan hæves og sænkes til varied-ring af ringspaltens højde og dermed regulering af mængden af den indblæste luft.On the side of elevation member elevation 16 there are a plurality of vertical baffles arranged in a particular pattern, as shown in FIG. 2. The outer edge of the guide plates is shaped after the inside of the collar 8, so that they can sit up therein, so that there is still free air passage between the guide plates. The distributor plate 10 is suspended in the air duct 2 in such a way that it can be raised and lowered to vary the height of the annular gap and thus regulate the amount of the blown air.

35 Som det fremgår af fig. 2 er ledepladerne arrange ret efter et bestemt mønster. Der er fire par 18 paral- DK 168774 B1 4 leile ledeplader anbragt over for hinanden på to vinkelrette diametre, vinkelrummene mellem de parallelle ledeplader er underopdelt med radiært anbragte ledeplader 20. Fordelingen er i øvrigt således, at den frie afstand 5 ved inderkredsen mellem to på hinanden følgende sæt parallelle ledeplader svarer til afstanden mellem to parallelle plader altså D = 3 x d. Lufthastigheden mellem to parallelle plader er større end lufthastigheden i det udad divergerende vinkelrum mellem to på hinanden 10 følgende sæt parallelle ledeplader. Praktiske forsøg viser, at man ret overraskende med denne udformning opnår et praktisk taget kvadratisk indblæsningsmønster som ét sammenhængende lufttæppe med en jævn fordeling af luften hele vejen rundt.35 As can be seen from FIG. 2, the baffles are arranged according to a particular pattern. There are four pairs of 18 parallel baffles placed opposite each other on two perpendicular diameters, the angular spaces between the parallel baffles are subdivided by radially arranged baffles 20. The distribution is furthermore such that the free distance 5 at the inner circle between two successive sets of parallel baffles correspond to the distance between two parallel baffles thus D = 3 x d. The air velocity between two parallel baffles is greater than the air velocity in the outwardly divergent angular space between two consecutive sets of parallel baffles. Practical experiments show that, quite surprisingly, this design achieves a practically square blow-in pattern as one continuous air blanket with an even distribution of air all around.

15 Ventilationsapparatet kan yderligere forsynes med en recirkuleringsenhed for recirkulering af rumluften. Denne enhed omfatter et tragtformet rørstykke 22, hvis overside går over i en vandret kant og forsynet med ledeplader efter samme mønster som den øverste luftfor-20 delerplade. Tragten danner sammen med en plan underside af luftfordelerpladen en ringformet spalte 14, hvor den recirkulerede rumluft sendes ud igennem. Enheden omfatter desuden en elmotor 24 med et skovlsæt 26. Enheden kan som et samlet hele ophænges i luftfordelerpladen.The ventilation apparatus may further be provided with a recirculation unit for recirculating the room air. This unit comprises a funnel-shaped tube piece 22, the upper side of which extends into a horizontal edge and provided with baffles according to the same pattern as the upper air distributor plate. Together with a flat underside of the air distributor plate, the hopper forms an annular slot 14 through which the recirculated room air is sent out. The unit further comprises an electric motor 24 with a vane set 26. The unit can as a whole be suspended in the air distributor plate.

25 Med opfindelsen er der således frembragt et venti lationsapparat, som ved ganske enkle foranstaltninger er i stand til at udvirke en luftspredning som et sammenhængende tæppe med en i det mindste tilnærmet rektangulær form. Derved kan man i højere grad undgå døde zoner, 30 fordi indblæsningsmønsterets form geometrisk er mere samstemmende med bygningens form, end tilfældet er ved et cirkulært indblæsningsmønster. Det bemærkes at alle-• rede eksisterende ventilationsapparater af den omhandlede art kan ombygges ifølge opfindelsen.Thus, with the invention there is provided a ventilation apparatus which, by simple measures, is capable of effecting an air diffusion as a continuous blanket of at least approximately rectangular shape. In this way, dead zones can be avoided to a greater extent, because the shape of the blow-in pattern is geometrically more consistent with the shape of the building than is the case with a circular blow-in pattern. It is noted that already existing ventilation apparatus of the kind in question can be rebuilt according to the invention.

Claims

A ceiling mounted ventilation apparatus, in particular for housing ventilation, in which the air is blown into the space through a horizontal annular gap (12, 14), in which is arranged at least one set of baffles arranged in pairs parallel to 5 (18), characterized in that the angular space between the baffles ( 18) is subdivided with radially arranged baffles (20).

Ventilation apparatus according to claim 1, characterized in that the distance at the inner circle between two parallel baffles corresponds to the free distance between the adjacent baffles on two successive sets of parallel baffles (18).

Ventilation apparatus according to claim 2, characterized in that it comprises four sets (18) of parallel baffles spaced at a spacing of 90o.

Ventilation apparatus according to claim 1, 2 or 3, characterized in that the baffles (18, 20) are arranged in connection with an elevation (16) on an air distribution plate (10) which forms the lower boundary of the annular gap (12).

Ventilation apparatus according to Claim 4, characterized in that the air distributor plate (10) is suspended so that it can be raised and lowered for adjusting the height of the ring gap (12) and thus regulating the amount of air injected.

Ventilation apparatus according to claim 1, 2, 3, 4 or 5, comprising a top ring gap (12) in connection with a fresh air intake and an underlying ring gap (14) for recirculation of room air, characterized in that at least one of the ring slots (12, 14) is provided with a set of baffles (18, 20) as defined in the preceding claims.

Ventilation apparatus according to claim 6, characterized in that the ring slots (12, 14) are arranged with at least one set of preferably identical baffles (18, 20).

Ventilation apparatus according to claim 6 or 7, characterized in that the lower annular gap _10 is formed between the underside of the lower boundary (10) of the upper annular gap (12) and a funnel-shaped pipe piece (22), and the baffles (18, 20). is arranged on the funnel towards its edge.

A rectangular floor plan housing and equipped with at least one ventilation apparatus according to one of claims 1-4, characterized in that the ventilation apparatus is arranged in such a way that a set (18) of the parallel baffles points to each of the corners of the room.