EP0563509A2 - Sortie d'air pour installation de traitement d'air - Google Patents

Sortie d'air pour installation de traitement d'air Download PDF

Info

Publication number: EP0563509A2
Authority: EP; European Patent Office
Prior art keywords: air; distribution box; supply air; source; source air
Prior art date: 1992-03-28
Legal status (The legal status 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 status listed.): Granted

Application number

EP93100311A

Other languages

German (de)

English (en)

Other versions

EP0563509B1 (fr

EP0563509A3 (en

Inventor

Detlef Makulla

Marten Dr. Brunk

Hans Leyer

Necmi Basaran

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

H Krantz TKT GmbH

Original Assignee

H Krantz TKT GmbH

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.)

1992-03-28

Filing date

1993-01-12

Publication date

1993-10-06

1993-01-12 Application filed by H Krantz TKT GmbH filed Critical H Krantz TKT GmbH

1993-10-06 Publication of EP0563509A2 publication Critical patent/EP0563509A2/fr

1993-12-29 Publication of EP0563509A3 publication Critical patent/EP0563509A3/de

1996-05-15 Application granted granted Critical

1996-05-15 Publication of EP0563509B1 publication Critical patent/EP0563509B1/fr

2013-01-12 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

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Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors

Definitions

the invention relates to a source air passage for ventilation systems according to the preamble of claim 1.
Such source air passages must introduce the supply air over a large area in the floor area with low air speeds and in the same direction. Furthermore, the source air passages require a certain pressure loss at the inlet in order to achieve a uniform loading of several passages when these are supplied with supply air from the same cavity floor. On the inside, it is again important that the outflow cross-section facing the room to be air-conditioned is acted upon uniformly so that no local speed peaks occur in the room. It is known from EP-OS 0 311 934 to connect several chambers in series for this purpose and to realize the pressure loss or the uniform distribution of the supply air through a perforated plate or a honeycomb grid. However, the construction of two chambers is expensive and requires a relatively large amount of space. Furthermore, the cleaning of the source air passage inside is difficult and the use in thin room partitions is only possible to a limited extent.
Source air outlets are often installed in connection with air-guiding double floors (DE-PS 36 40 706) and here in particular with cast vaulted floors.
the air connection piece of the source air diffuser is cast in and must be positioned very precisely so that the attached source air diffuser sits later in the right place. An adjustment option for construction tolerances and assembly inaccuracies in the source air passage would save working time for assembly and modification work.
source air outlets must be designed so that they can be shut off individually.
Motorized butterfly valves are usually installed in the supply line for this purpose. In the case of cast vaulted cavities, however, this solution is ruled out.
the engine and the butterfly valve should be in the housing of the displacement air diffuser here.
Real source air systems i. H. Systems without induction of warmer indoor air in the air outlet are limited to about 4 Kelvin in the difference between the supply and indoor air temperature, so that the temperature difference between the head and foot area remains within 2 Kelvin for reasons of comfort.
the temperature difference cannot be increased further, only the supply air volume flow.
the air velocity in the outflow cross section of the source air diffuser must be below 20 cm / s in the comfort range, only an increase in the outflow area is generally possible over the height of the source air diffuser.
values twice as high as before the source air outlet can be achieved, which can lead to drafts, especially in summer when wearing open shoes.
a further requirement for a source air outlet is made in the area of acoustics. If source air outlets in adjacent rooms are connected to the same air-bearing cavity floor, there is a risk of noise being transmitted by air. The sound then passes from one room to the neighboring room via the path of source air passage in the transmission room, cavity floor and source air passage in the reception room. A sound-absorbing lining of the entire cavity floor is usually ruled out for cost reasons.
the invention has for its object to design the known source air passage in such a way that the exiting air reaches the area where people are staying with a speed distribution that is uniform over the height, and that the possibility of easy accessibility of the distribution box, a reduction in noise transmission, an air barrier and one Adaptation to building tolerances is given.
the outflow element according to the invention causes a uniform application to the honeycomb grid acting as flow straightener.
the outer perforated plate creates a backflow effect, which ensures an even air flow within the honeycomb grille.
the outer perforated plate divides the supply air entering the room to be air-conditioned into many individual jets, which rapidly reduce the air speed due to mutual induction.
Such an angular position creates an increase in the layer height of the flowing supply air layer in the room to be air-conditioned.
the initial inclination of the air jets counteracts a downward velocity component, which results from the higher density of the cooler supply air compared to the ambient air and which would lead to an increase in the flow velocity in the lower region of the flowing air layer.
the outflow element can be carried out completely in a simple manner Removable from maintenance and assembly work, so that the units arranged inside the distribution box, for. B. trained according to claims 6 and 7 shut-off are easily accessible. Due to the features of claims 8 and 9, tolerances and inaccuracies in the construction area and in the assembly of the displacement air passage can be compensated.
a transmission of noise between rooms via a plurality of distribution boxes connected to the same floor space can be reduced by the guide element designed according to claim 11 directing the supply air before exiting the outflow element against the rear wall of the distribution box provided with a sound-absorbing material.
a source air passage which contains a distribution box 1.
the distribution box 1 is delimited by a ceiling 2, a rear wall 3, a floor 4 and on the outlet side by an outflow element 5.
the ceiling 2 and the rear wall 3 can be provided on the outside with a heat-insulating material 28.
one or more supply air openings 6 are provided, which are connected to a cavity floor 8 having one or more through openings 7.
the distribution box 1 of the source air passage is supplied with supply air via this cavity floor 8.
the source air passage is arranged according to FIG. 1 in the area of the parapet of the window wall.
the source air outlet can also be accommodated in room partitions, in the cabinet base area or on and around columns.
the outflow element 5 (FIGS. 5, 6) is formed by a honeycomb grid 9, which acts as a rectifier, and is made of honeycombs of round, square or polygonal cross section, which is delimited by an inner perforated plate 10 and an outer perforated plate 11.
the perforated plates 10, 11 form with the honeycomb grid 9 a component that can be removed from the distribution box 1.
the free cross section of the holes in the perforated plates 10, 11 is smaller than the free cross section of the honeycombs of the honeycomb grid 9.
the longitudinal axis of the honeycomb of the honeycomb grid 9 is directed obliquely upward in the direction of flow of the supply air and forms an angle of less than 90 ° with the vertical .
the angle that the honeycomb axis forms with the vertical can also be 90 °. This can be advantageous if the source air passage is only low and if there are small temperature differences between the supply air and the room air.
a nonwoven fabric or a porous plate for example made of foam, can also be used as a rectifier.
FIG. 7 shows the flow conditions which occur immediately before and after the outflow element 5 according to the invention.
the distribution box 1 which is characterized by the area A
the supply air flows in obliquely and unevenly.
region B the flow within the honeycombs of the honeycomb grid 9 is rectified.
a swirl takes place in the area C, which is followed by the area D with a low-turbulence displacement flow.
FIG. 1 to 3 show the flow profiles of the emerging displacement flow for various outflow elements.
the length of the arrows gives a measure of the size of the flow velocity and the direction of the arrow the direction of flow.
the speed profile generated directly by the honeycomb grille of the honeycomb grille directly behind the outflow element is, according to FIG. 1, uniform over the height of the air flow and has an overall upward direction. Since the supply air has a lower temperature than the indoor air and therefore has a higher density, there is a speed component in the direction of the floor. Due to the upward outflow, the downward velocity component is effectively counteracted by the higher density of the supply air.
the flow speed in the lower area can be more than twice as high as in the upper area.
the honeycomb grille with horizontal honeycombs remains limited to applications in which the source passage has a low overall height and in which there is a small temperature difference between supply air and room air.
the diameter of the holes in the perforated plates 10, 11 is matched to the desired pressure loss.
care must be taken that all honeycombs are acted upon. This is the case if the honeycomb diameter or the clear width of the individual honeycomb is equal to or greater than the hole division.
a honeycomb is assigned to each hole of the inner perforated plate 10. The same applies to the outer perforated plate 11. It may well be that the wall of a honeycomb comes to rest in the area of a hole. This does not affect the air flow pattern in the room to be air-conditioned.
the holes 12 in the upper region of the outer perforated plate 11 are designed like nozzles, while the holes 13 in the lower part are simple openings.
the honeycombs in the area of the holes 12 formed as nozzles are preferably acted upon higher than the honeycombs in the lower area of the honeycomb grid 9.
the supply air opening 6 is followed by a supply air nozzle 14 projecting into the cavity floor 8.
a shut-off device is located inside the distribution box 1 to block the source air passage, if necessary.
This shut-off device consists of a cover 15 which is connected to the end of a threaded rod 16 designed as a rising spindle.
a drive motor 17 engages the threaded rod 16 and is fastened to the ceiling 2 of the distribution box 1 via a bracket 18.
the installation of perforated disks 19 transversely in the distribution box 1 can influence the action of the air volume flow of the outflow element 5. This can be particularly useful in the corner areas of rooms if the source air diffusers meet at right angles there and the air velocity would increase.
shut-off device consists of a perforated plate cylinder 20 which is placed on the supply air connector 14.
the perforated plate cylinder 20 is surrounded by a solid wall cylinder 21 which is vertically adjustable. The adjustment is carried out via a threaded rod 16 and a drive motor 17.
This type of shut-off device is recommended if, in particular with long displacement air passages with only a supply air nozzle requires a more uniform action on the source air passage and in particular the outflow element.
the hole pattern of the perforated plate cylinder 20 is chosen so that a corresponding adaptation to the desired pressure loss and a desired air distribution in the interior of the distribution box 1 is achieved.
the supply air connection 14 is provided with a right-angled edge flange 22.
the outer diameter of the edge flange 22 is larger than the cross section of the supply air opening 6 in the bottom 4 of the distribution box 1.
the supply air connector 14 is displaceable relative to the distribution box 1 and temporarily receives an insert 23 made of rigid foam during assembly.
the procedure is such that the insert 23 is inserted into the supply air connection 14 and this is fastened to the supply air connection 14 on the raw concrete ceiling 29.
the inlet air connection 14 can now be adjusted in height on the insert 23 up to the required dimension of the cavity floor 8.
the insert 23 is removed again.
the distribution box 1 is placed on the edge flange 22 of the supply air connector 14 and aligned, displacement in two planes being possible. Finally, the distribution box 1 is screwed to the edge flange 22.
FIG. 10 Another embodiment for compensating for construction tolerances is shown in FIG. 10.
a continuous slot 24 is arranged as a supply air opening in the bottom 4 of the distribution box 1.
the slot 24 can also be interrupted by webs.
This design of a slit-shaped supply air opening in the bottom 4 of the distribution box 1 of the displacement air passage is particularly suitable for narrow room partition walls.
the distribution box 1 is sealed off from the cavity floor 8 by a circumferential seal 25. If the area of the supply air opening designed as a slot 24 is smaller than the area enclosed by the circumferential seal 25, the inside Cavity floor 8 existing passage opening 7 for the supply air does not exactly match the slot-shaped supply air opening in the floor 4 of the distribution box 1. This also allows for adaptation to tolerances by moving in two planes.
FIGS. 13 to 15 serves to reduce the possible transmission of noise between neighboring rooms via the source air passages and a common cavity floor 8.
the supply air is fed via the supply air connection 14 through the supply air opening 6 to the distribution box 1, the rear wall 3 and the ceiling 2 of which are provided with a sound-absorbing material 26.
a guide element 27 which is curved as a half-cylinder shell, is installed in the distribution box 1.
the closed side of the cup-shaped guide element 27 faces the outflow element 5 and the open side faces the rear wall 3.
the guide element 27 extends over the height of the distribution box 1 between the floor 4 and the ceiling 2.
the supply air entering through the supply air opening 6 is directed by guide element 27 onto the rear wall 3 provided with the sound-absorbing material 26.
the deflection extends the path of the sound, and the sound waves are brought into contact with the sound-absorbing material 26, and are largely absorbed.
the guide element 27 can consist of sound-absorbing material or of a sheet metal coated with sound-absorbing material. Instead of providing the entire ceiling 2 with a sound-absorbing material 26, only the area of the ceiling 2 that is above the supply air opening 6 can be lined.
the guide element 27 does not necessarily have to be semi-cylindrical, but can also have a different geometric shape.
the guide element 27 according to FIG. 16 is angled, while the guide element 27 according to FIG. 17 has the shape of a stepped shell. In both cases, the closed side faces the outflow element 5 and the open side faces the rear wall 3. Priority to the shape of the shell is its orientation and thus the extension of the sound path and the enlargement of the sound absorption area.

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Duct Arrangements (AREA)
Air-Flow Control Members (AREA)
Treating Waste Gases (AREA)
Respiratory Apparatuses And Protective Means (AREA)
Treatment Of Fiber Materials (AREA)

EP93100311A 1992-03-28 1993-01-12 Sortie d'air pour installation de traitement d'air Expired - Lifetime EP0563509B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4210279		1992-03-28
DE4210279A DE4210279A1 (de)	1992-03-28	1992-03-28	Quelluftdurchlaß für raumlufttechnische Anlagen

Publications (3)

Publication Number	Publication Date
EP0563509A2 true EP0563509A2 (fr)	1993-10-06
EP0563509A3 EP0563509A3 (en)	1993-12-29
EP0563509B1 EP0563509B1 (fr)	1996-05-15

Family

ID=6455353

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP93100311A Expired - Lifetime EP0563509B1 (fr)	1992-03-28	1993-01-12	Sortie d'air pour installation de traitement d'air

Country Status (4)

Country	Link
EP (1)	EP0563509B1 (fr)
AT (1)	ATE138181T1 (fr)
DE (2)	DE4210279A1 (fr)
ES (1)	ES2088165T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0615103A1 (fr) *	1993-03-06	1994-09-14	Schako Metallwarenfabrik Ferdinand Schad Kg	Sortie d'air de plinthe
WO1995008473A1 (fr) *	1993-09-20	1995-03-30	United Technologies Corporation	Cache conduit destine a diriger un fluide a travers celui-ci et son procede de production
EP0787954A2 (fr)	1996-01-30	1997-08-06	Hesco Pilgersteg AG	Dispositif d'entrée d'air
CH703924A1 (de) *	2010-10-13	2012-04-13	Trox Hesco Schweiz Ag	Ebenflächige Ausströmwand eines Luftdurchlasses.
US20120322356A1 (en) *	2010-02-15	2012-12-20	Koken Ltd.	Local clean zone forming apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19523625C2 (de) *	1995-04-27	1999-11-11	Mayer Georg	In einem zu klimatisierenden Raum installierte lufttechnische Einrichtung
DE10058701B4 (de) *	2000-11-25	2008-02-28	E.On Ruhrgas Ag	Einrichtung zum Prüfen eines Durchflußmeßgerätes
DE102004018278B4 (de) *	2004-04-13	2006-01-19	Thermosoft Klimatechnik Gmbh	Decke, insbesondere Kühl-oder Heizdecke
DE102012208621A1 (de) *	2012-05-23	2013-12-12	BSH Bosch und Siemens Hausgeräte GmbH	Abdeckgitter für eine Ein- oder Austrittsöffnung eines von einem gasförmigen Medium durchströmten Kanals

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3059564A (en) *	1959-10-30	1962-10-23	Robertson Co H H	Low noise air distributor
US3200734A (en) *	1963-05-08	1965-08-17	Pyle National Co	Combination acoustic ceiling panel and air diffuser
DE2614559B2 (de) *	1976-04-03	1981-06-19	MERO-Werke Dr.-Ing. Max Mengeringhausen, GmbH & Co, 8700 Würzburg	Doppelbodenplatte mit in einem Einsatzelement vorgesehenen Luft-Durchtrittsöffnungen
DE3640706A1 (de) *	1986-07-08	1988-01-28	Herbst Donald	Vorrichtung zur belueftung von raeumen
DE8713694U1 (de) *	1987-10-13	1989-02-09	Heinrich Nickel Gmbh, 5240 Betzdorf	Quell-Luftauslaß für Lüftungs- und Klimatisierungszwecke
DE4037287C2 (de) *	1989-12-29	1997-10-02	Schako Metallwarenfabrik	Auslaß

1992
- 1992-03-28 DE DE4210279A patent/DE4210279A1/de not_active Withdrawn
1993
- 1993-01-12 EP EP93100311A patent/EP0563509B1/fr not_active Expired - Lifetime
- 1993-01-12 ES ES93100311T patent/ES2088165T3/es not_active Expired - Lifetime
- 1993-01-12 AT AT93100311T patent/ATE138181T1/de not_active IP Right Cessation
- 1993-01-12 DE DE59302557T patent/DE59302557D1/de not_active Expired - Fee Related

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0615103A1 (fr) *	1993-03-06	1994-09-14	Schako Metallwarenfabrik Ferdinand Schad Kg	Sortie d'air de plinthe
WO1995008473A1 (fr) *	1993-09-20	1995-03-30	United Technologies Corporation	Cache conduit destine a diriger un fluide a travers celui-ci et son procede de production
US5558919A (en) *	1993-09-20	1996-09-24	United Technologies Corporation	Duct cover for directing a fluid therethrough
EP0787954A2 (fr)	1996-01-30	1997-08-06	Hesco Pilgersteg AG	Dispositif d'entrée d'air
EP0787954A3 (fr) *	1996-01-30	1998-03-18	Hesco Pilgersteg AG	Dispositif d'entrée d'air
US20120322356A1 (en) *	2010-02-15	2012-12-20	Koken Ltd.	Local clean zone forming apparatus
US9791161B2 (en) *	2010-02-15	2017-10-17	Koken Ltd.	Local clean zone forming apparatus
CH703924A1 (de) *	2010-10-13	2012-04-13	Trox Hesco Schweiz Ag	Ebenflächige Ausströmwand eines Luftdurchlasses.

Also Published As

Publication number	Publication date
ATE138181T1 (de)	1996-06-15
DE59302557D1 (de)	1996-06-20
DE4210279A1 (de)	1993-09-30
ES2088165T3 (es)	1996-08-01
EP0563509B1 (fr)	1996-05-15
EP0563509A3 (en)	1993-12-29

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Publication	Publication Date	Title
DE2754699C2 (fr)	1988-12-29
DE2609030C3 (de)	1984-05-24	Vorrichtung zum Führen von aus einer luftdurchlässigen perforierten Fläche austretenden Luftströmen
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