EP0466669A1 - Appareil ajustable pour approvisionnement d'air - Google Patents

Appareil ajustable pour approvisionnement d'air Download PDF

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Publication number
EP0466669A1
EP0466669A1 EP91850142A EP91850142A EP0466669A1 EP 0466669 A1 EP0466669 A1 EP 0466669A1 EP 91850142 A EP91850142 A EP 91850142A EP 91850142 A EP91850142 A EP 91850142A EP 0466669 A1 EP0466669 A1 EP 0466669A1
Authority
EP
European Patent Office
Prior art keywords
air
outflow zone
screen
heat
normal operation
Prior art date
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.)
Withdrawn
Application number
EP91850142A
Other languages
German (de)
English (en)
Inventor
Helge Enberg
George Dhenstrand
Sten Hakansson
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.)
STRATOS VENTILATION PRODUKT AB
Original Assignee
STRATOS VENTILATION PRODUKT AB
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.)
Filing date
Publication date
Application filed by STRATOS VENTILATION PRODUKT AB filed Critical STRATOS VENTILATION PRODUKT AB
Publication of EP0466669A1 publication Critical patent/EP0466669A1/fr
Withdrawn legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F2007/004—Natural ventilation using convection

Definitions

  • the invention relates to an air supply device intended for placing in the vicinity of the floor in a room or premises, which are to be ventilated, the device having a relatively large extension in height and in normal operation being adapted for supplying air at, or below, room temperature with a relatively low flow rate for achieving uniform and draught-free, i.e. so-called displacement air supply.
  • Such ventilation functions excellently as long as the supplied air has a lower temperature than the air in the ceiling zone, so that the layers can be retained.
  • the problem is here, however, that the warm air flowing out from the air supply device, this air having a low rate of flow in air supply devices of this kind, rises upwards by convection.
  • there is the risk of the formation of a warm air cushion in the upper zone of the premises while the temperature in the occupational zone remains relatively low, in spite of the warm air being supplied. A large temperature gradient can thus occur, and the climate in-the occupational zone would be unfavourable. In addition, this results in poor heat economy.
  • the present invention has the object of solving this problem and providing an air supply device enabling heat-supplying operation while retaining a relatively low temperature gradient,satisfactory climate in the occupational zone and good heat economy.
  • the supply air device being adjustable between two different operational states in the manner described in principle in claim 1. Accordingly, the air supply device can function in normal operation in a corresponding manner to previous air supply devices of this kind, while for heat-supplying operation at least the major portion of the air flow heated above room temperature will flow out from the device through a lower, outflow zone comparatively near the flow, and at an increased rate of flow directed substantially parallel to the flow.
  • the supply air flowing out from the device will adhere to the floor due to the so-called Coanda-effect for a substantially greater distance than would be case if the clean supply air heated to above room temperature flowed out at a low flow rate from the entire active outflow surface of the device.
  • the clean air above room temperature at least reaches a major part of the occupational zone, in particular the area for work stations in the premises.
  • the flow rate is substantially higher in this case, since flowing warm air is not felt as an uncomfortable draught.
  • Fig. 1 is a perspective view of an air supply device in accordance with the invention, a part of the front grid of the device being cut away to illustrate the interior of the device;
  • Fig. 2a is a vertical section to a larger scale of an upper part of the air supply device
  • Fig. 2b shows to a somewhat smaller scale than in Fig. 2a the entire air supply device in vertical section (rotated 90° relative the secton in Fig.2a);
  • Fig. 3 illustrates a modified, second embodiment of the device, similarly in a vertical section
  • FIG. 4 illustrates in a corresponding manner a third embodiment of the air supply device in accordance with the invention
  • the air supply device illustrated in Fig. 1 comprises, in a manner known per se, a flat, air-tight rear wall 1, an approximately semicylindrical front grid wall 2 with an air-permeable mat (unillustrated in the schematic figures on the drawings) and made from e.g. as foamed plastics, an upper, approximately semicircular end wall 3 with a downwardly directed flange 3a engaging over the upper edge portion of the grid wall 2, and a corresponding lower end wall 4 with an upwardly directed flange 4a.
  • the air supply device the height of which is preferably greater than its width, and which has dimensions which can vary, rests on a bottom base 5 and is intended for placing upright on the floor in a room which is to be ventilated.
  • the dimensions and exterior configuration of the device are unessential for the invention, provided that it has a relatively large extension in height and that the front outflow surface is of a size such that desired outflow of the air can be obtained at a relatively low flow rate, as discussed in the introduction.
  • the air supply device has a cylindrical inlet stub 6 projecting upwards a short distance for connection to an unillustrated supply air duct, the stub also projecting downwards a distance into the substantially semicylindrical chamber 7 formed by the walls 1,2,3 and 4.
  • a downwardly conicly tapering, air-permeable bag 8 is connected to the inlet stub 6 such as to extend downwards throughout the entire chamber 7 for being retained at its vertex 8a by a fixing means 9 at a lower fixed plate 10.
  • the plate 10 is arranged level with the upper edge of the flange 4a of the lower end wall 4 and serves to ensure substantially horizontal air flow even in the bottom-most portion of the device also.
  • the flange 4a would otherwise cause an irregular flow pattern in this lower part of the device.
  • the bag 8 which is preferably made from a filter material, e.g. polyester fibre, ensures a substantially uniform air flow along the entire height of the device, and for reasons of symmetry the air outflow will be substantially uniform laterally as well (along an angular sector of 180° in this embodiment).
  • a filter material e.g. polyester fibre
  • the air supply device is adjustable between normal operation where air at, or below, room temperature is supplied via the inlet stub 6 and flows out substantially uniformly at a relatively low flow rate from the entire surface of the front grid wall 2, and heat supplying operation, where supply air at a temperature in excess of room temperature is caused to flow out substantially via a lower outflow zone Z1 (Fig. 2b) at an increased flow rate.
  • a lower outflow zone Z1 Fig. 2b
  • this adjustment is provided with the aid of a screening means in the form of a compactable, substantially cylindrical bellows our hose 11 which is upwardly connected to a flange ring 12 and is downwardly fastened to the edge of a circular opening 13a in a semicylindrical plate 13.
  • this plate 13 fits inside the rear wall 1 of the device and the semicylindrical front grid wall 2 and is vertically movable inside the chamber 7.
  • the hose 11 in its extended state is somewhat shorter than the height of the chamber 7, and when the hose is raised to its extended state illustrated in Fig. 2b it carries the plate 13 so that the latter is kept at a distance above the underlying plate 10.
  • the hose 11 is accordingly liftable from its lower compacted position about the hole 13a illustrated in Fig. 1, where the movable plate 13 rests against the plate 10, to its vertically extended state illustrated in Fig. 2e, which is brought about with the aid of two lifting straps 14a,14b.
  • These straps can be wound up on the individual reels 15a and 15b, respectively (see Fig. 2a), these reels being nonrotatably mounted on a shaft 16 passing transversely through the inlet stub 6 and mounted rotatably thereon.
  • the shaft is rotatable with the aid of an electric motor 17 mounted in an unillustrated manner, e.g. at the rear wall 1, the upper end wall 3 or the inlet stub 6.
  • the air at, or below, room temperature supplied via the inlet stub 6 and bag 8 will flow out, as described above, substantially uniformly through the front grid wall 2, i.e. over the entire surface thereof, namely both in the above mentioned lower outflow zone Z1 and in the upper outflow zone Z2 (Fig. 2b), which is substantially greater as to area and height.
  • the hose 11 is raised with the aid of the motor 17 and the straps 14a,14b, which can be wound up on the reels 15a,15b, until the upper flange ring 12 engages sealingly against the lower, flanged edge portion of the inlet stub 6.
  • the plate 13 is also raised to the position illustrated in Fig. 2b.
  • the relatively warm supply air will flow out from the bag 8 and be deflected downwards by the surrounding impermeable hose 11, so that the air flows out via the opening 13a in the plate and substantially horizontally outwards through the grid wall 2 is the lower outflow zone Z1. Since the surface area of the grid wall 2 in this zone Z1 is small in comparison with the total area of the grid wall 2, the flow rate for a given air flow will be substantially greater in this position of adjustment.
  • the warm air flowing out will adhere to the floor along a relatively long distance, this effect being reinforced by the so-called Coanda-effect, and the desired lower temperature gradient in a vertical direction can be maintained in spite of the higher temperature of the supply air.
  • the hose may consist of a pleated bellows, be provided with interior or exterior guides for ensuring ordered compaction, or may be formed as a flat curtain, possibly in the form of a roller blind, particularly for a device having a substantially flat outflow surface.
  • a bellows or hose can also be used for flat devices, the hose then suitably having a non-circular, e.g. rectangular, elongate cross-section.
  • the screen as a telescopicly collapsible tube having mutually displaceable tube sections or a plurality of pivotable or rotatable screen blades, which are adjustable between a screening and a non-screening position in the area of the upper outflow zone Z2.
  • the lifting means can naturally be formed in different ways.
  • the lifting movement can be achieved by manually operated means, and the illustrated lifting straps can be replaced by ropes,, belts or chains, possibly in the form of endless loops.
  • the vertically movable, holed plate 13 can coact with a stop in its upper position (corresponding to the one in Fig. 2b), possibly in the form of an inwardly directed flange, which can be provided with a resilient sealing means on its underside or on the upper side of the plate 13.
  • FIG. 3 A modified, second embodiment is illustrated in Fig. 3, which only differs from the one described in connection with Figs. 1, 2a and 2b by the hole plate 13′ being immovable and fixedly connected to the rear and front walls 1,2 of the device.
  • the hose 11 will be situated higher up, when it assumes its compacted position, but this only insignificantly affects the total flow pattern in normal operation.
  • the flow will be exactly the same as for the first embodiment, possibly with the difference that no leakage takes place at the edge portions of the plate 13′.
  • a third embodiment is schematicaly illustrated in Fig. 4.
  • the air supply device comprises a front, box-like part with a chamber 7 defined by walls 1, 2, 3 and 13" (in this case without a hole opening) and a bag 8 (although without any screen corresponding to the hose 11) there also being an upwardly, rearwardly and downwardly surrounding bypass part, with an upper chamber 18 , a rear vertically extending chamber 19 and a lower chamber 20 , from which bypassed warm air flows out in a lower outflow zone Z1 when the above-mentioned flap 21 assumes the position illustrated by chain dotted lines in Fig. 4.
  • the air at, or below, room temperature supplied via the stub 6 flows out via the upper outflow zone Z2, no flow taking place from the lower outflow zone Z1.
  • the base 5 can be excluded in all embodiments.
  • the inlet opening 6 can be arranged downwards in the device, the bag 8 (if such is used at all) being turned upside-down, so that its open end is connected to the inlet opening and its apex is situated upwardly.
  • the flap or screening means must in this case also screen off the upper outflow zone Z2 for heat-supplying operation.

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)
  • Central Air Conditioning (AREA)
  • Ventilation (AREA)
EP91850142A 1990-06-20 1991-05-29 Appareil ajustable pour approvisionnement d'air Withdrawn EP0466669A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9002202 1990-06-20
SE9002202A SE9002202L (sv) 1990-06-20 1990-06-20 Omstaellbart tilluftsdon

Publications (1)

Publication Number Publication Date
EP0466669A1 true EP0466669A1 (fr) 1992-01-15

Family

ID=20379827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91850142A Withdrawn EP0466669A1 (fr) 1990-06-20 1991-05-29 Appareil ajustable pour approvisionnement d'air

Country Status (3)

Country Link
EP (1) EP0466669A1 (fr)
JP (1) JPH06317339A (fr)
SE (1) SE9002202L (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992014973A1 (fr) * 1991-02-14 1992-09-03 ABB Fläkt AB Procede et dispositif de repartition pour l'alimentation en air d'une piece
WO1995008084A1 (fr) * 1993-09-15 1995-03-23 P.O. Andersson Konstruktionsbyrå Ab Agencement de ventilation a filtre amortisseur acoustique, amortisseur de flux destine au filtrage
EP0694635A3 (fr) * 1994-07-29 1996-08-28 Pneumafil Corp Diffuseur d'air laminaire
EP0921356A3 (fr) * 1997-12-05 2000-06-07 KRANTZ - TKT GmbH Sortie d'air de déplacement
DE19951401A1 (de) * 1999-10-26 2001-05-03 Schako Metallwarenfabrik Vorrichtung zum Einbringen von Luft in einen Raum
EP1085274A3 (fr) * 1999-09-16 2002-06-12 Schako Metallwarenfabrik Ferdinand Schad Kg Dispositif pour introduire de l'air dans un local
EP1283398A2 (fr) 2001-08-09 2003-02-12 SCHAKO Klima Luft Ferdinand Schad KG Dispositif pour l'introduction et/ou l'évacuation de l'air
DE10161145A1 (de) * 2001-12-12 2003-06-26 Schako Metallwarenfabrik Quellauslass
DE10160464C1 (de) * 2001-12-10 2003-08-21 Schako Metallwarenfabrik Quellauslass
EP1318360A3 (fr) * 2001-12-10 2005-08-17 SCHAKO Klima Luft Ferdinand Schad KG Sortie d'air
WO2005114059A2 (fr) * 2004-05-19 2005-12-01 Halton Company Registre de ventilation a commutation automatique de modes et systemes d'augmentation de mode de chauffage
ITPR20120052A1 (it) * 2012-07-31 2014-02-01 Mazzimpianti S R L Diffusore d'aria a dislocamento cilindrico verticale, metodo e impianto di climatizzazione cosi' ottenuto
US10365003B2 (en) 2005-01-06 2019-07-30 Oy Halton Group Ltd. Automatic displacement ventilation system with heating mode
DE102019103403A1 (de) * 2019-02-12 2020-08-13 Krantz Gmbh Luftdurchlass zur Belüftung und Temperierung eines Raumes eines Gebäudes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016119547A1 (de) * 2016-03-21 2017-09-21 Dr. Schneider Kunststoffwerke Gmbh Luftausströmer
JP6600030B2 (ja) * 2018-03-29 2019-10-30 木村工機株式会社 空気式放射ユニット

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2718760A1 (de) * 1977-04-27 1978-11-02 Mabag Luft & Klimatechnik Luftauslass fuer lueftungs- und/oder klimatisierungssysteme
WO1986007439A1 (fr) * 1985-06-11 1986-12-18 Argon Corporation Systeme de climatisation personnalise
US4738188A (en) * 1984-02-25 1988-04-19 Nishida Tekko Corporation Room air circulating apparatus
CH667515A5 (de) * 1984-08-16 1988-10-14 Boehm Heinz In einem raum angeordnete vorrichtung zum ausgleich von dessen lufttemperaturverteilung.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2718760A1 (de) * 1977-04-27 1978-11-02 Mabag Luft & Klimatechnik Luftauslass fuer lueftungs- und/oder klimatisierungssysteme
US4738188A (en) * 1984-02-25 1988-04-19 Nishida Tekko Corporation Room air circulating apparatus
CH667515A5 (de) * 1984-08-16 1988-10-14 Boehm Heinz In einem raum angeordnete vorrichtung zum ausgleich von dessen lufttemperaturverteilung.
WO1986007439A1 (fr) * 1985-06-11 1986-12-18 Argon Corporation Systeme de climatisation personnalise

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992014973A1 (fr) * 1991-02-14 1992-09-03 ABB Fläkt AB Procede et dispositif de repartition pour l'alimentation en air d'une piece
WO1995008084A1 (fr) * 1993-09-15 1995-03-23 P.O. Andersson Konstruktionsbyrå Ab Agencement de ventilation a filtre amortisseur acoustique, amortisseur de flux destine au filtrage
US5766072A (en) * 1993-09-15 1998-06-16 P.O. Andersson Konstruktionsbyra Ab Ventilation arrangement, including filter constructed as sound dampener, flow damper and for filtering purposes
EP0694635A3 (fr) * 1994-07-29 1996-08-28 Pneumafil Corp Diffuseur d'air laminaire
EP0921356A3 (fr) * 1997-12-05 2000-06-07 KRANTZ - TKT GmbH Sortie d'air de déplacement
EP1085274A3 (fr) * 1999-09-16 2002-06-12 Schako Metallwarenfabrik Ferdinand Schad Kg Dispositif pour introduire de l'air dans un local
DE19951401A1 (de) * 1999-10-26 2001-05-03 Schako Metallwarenfabrik Vorrichtung zum Einbringen von Luft in einen Raum
EP1283398A2 (fr) 2001-08-09 2003-02-12 SCHAKO Klima Luft Ferdinand Schad KG Dispositif pour l'introduction et/ou l'évacuation de l'air
EP1283398A3 (fr) * 2001-08-09 2004-12-08 SCHAKO Klima Luft Ferdinand Schad KG Dispositif pour l'introduction et/ou l'évacuation de l'air
EP1318360A3 (fr) * 2001-12-10 2005-08-17 SCHAKO Klima Luft Ferdinand Schad KG Sortie d'air
DE10160464C1 (de) * 2001-12-10 2003-08-21 Schako Metallwarenfabrik Quellauslass
DE10161145A1 (de) * 2001-12-12 2003-06-26 Schako Metallwarenfabrik Quellauslass
DE10161145B4 (de) * 2001-12-12 2006-06-29 Schako Metallwarenfabrik Ferdinand Schad Kg Quellauslass
WO2005114059A2 (fr) * 2004-05-19 2005-12-01 Halton Company Registre de ventilation a commutation automatique de modes et systemes d'augmentation de mode de chauffage
WO2005114059A3 (fr) * 2004-05-19 2006-04-20 Halton Company Registre de ventilation a commutation automatique de modes et systemes d'augmentation de mode de chauffage
US10365003B2 (en) 2005-01-06 2019-07-30 Oy Halton Group Ltd. Automatic displacement ventilation system with heating mode
ITPR20120052A1 (it) * 2012-07-31 2014-02-01 Mazzimpianti S R L Diffusore d'aria a dislocamento cilindrico verticale, metodo e impianto di climatizzazione cosi' ottenuto
DE102019103403A1 (de) * 2019-02-12 2020-08-13 Krantz Gmbh Luftdurchlass zur Belüftung und Temperierung eines Raumes eines Gebäudes
WO2020165139A1 (fr) 2019-02-12 2020-08-20 Krantz Gmbh Passage d'air destiné à la ventilation et à la thermorégulation d'une pièce d'un bâtiment

Also Published As

Publication number Publication date
SE9002202L (sv) 1991-12-21
JPH06317339A (ja) 1994-11-15
SE9002202D0 (sv) 1990-06-20

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