EP1024334A2 - Diffuseur d'air - Google Patents

Diffuseur d'air Download PDF

Info

Publication number
EP1024334A2
EP1024334A2 EP99125755A EP99125755A EP1024334A2 EP 1024334 A2 EP1024334 A2 EP 1024334A2 EP 99125755 A EP99125755 A EP 99125755A EP 99125755 A EP99125755 A EP 99125755A EP 1024334 A2 EP1024334 A2 EP 1024334A2
Authority
EP
European Patent Office
Prior art keywords
air
aperture
environment
diffuser
continuous flow
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.)
Granted
Application number
EP99125755A
Other languages
German (de)
English (en)
Other versions
EP1024334B1 (fr
EP1024334A3 (fr
Inventor
Luca De Siati
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.)
TUB-AIR S.R.L.
Original Assignee
Tub-Air Snc Di De Siati Luca E Cigognetti Claudio
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 Tub-Air Snc Di De Siati Luca E Cigognetti Claudio filed Critical Tub-Air Snc Di De Siati Luca E Cigognetti Claudio
Publication of EP1024334A2 publication Critical patent/EP1024334A2/fr
Publication of EP1024334A3 publication Critical patent/EP1024334A3/fr
Application granted granted Critical
Publication of EP1024334B1 publication Critical patent/EP1024334B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F24F2013/0608—Perforated ducts

Definitions

  • the present invention relates to an ambient air recirculation system, particularly for public and industrial environments of medium and large cubic capacity.
  • the invention also relates to a diffuser for the application of the said system.
  • heating, air-conditioning and ventilation systems particularly in public and industrial environments of medium and large cubic capacity, give rise to an undesirable static layering of warm air in the upper part of the environment concerned. This phenomenon causes environmental discomfort for persons and a considerable waste of energy.
  • the present invention is intended to remedy them in a simple and economical way.
  • the principal object of the present invention is therefore to provide an ambient air recirculation system, particularly for public and industrial environments of medium and large cubic capacity, which makes it possible to maintain a constant and optimal circulation of ambient air between the upper and lower layers in the environment concerned, without the need for significant modifications to the existing heating, air-conditioning and/or ventilation systems, and with a low technical and financial input.
  • Another object is to provide an ambient air diffuser which is structurally simple and reliable in operation, as well as being easily installed, for the application of the system specified above.
  • the present invention provides an ambient air recirculation system, particularly for public and industrial environments of medium and large cubic capacity, whose essential characteristic is specified in Claim 1.
  • the ambient air diffuser for the application of the system according to the invention is specified in Claim 3.
  • At least one airtight tubular diffuser with a flexible wall is positioned in the upper part of the environment concerned, in which a static layering of warm air tends to occur.
  • the said diffuser has a static air intake which is located at the height of the layered warm air, and through which warm air is conveyed by forced conveying means into the said diffuser and fed in a continuous flow to at least one static aperture (nozzle) of the diffuser for the outlet of pressurized air, oriented towards the lower layers of air in the environment concerned.
  • a continuous flow of primary air in the shape of a cone passes through the said aperture into the said lower layers of the ambient air, while it generates an ambient air recirculation field in the vicinity of the aperture by an inductive phenomenon, since a low-pressure area is formed in the vicinity of the aperture by the "Venturi" effect, which causes the return of a continuous flow of layered air into the high part of the environment concerned and its mixing with the primary air flow passing out of the aperture.
  • the said recirculation system comprises an arrangement of diffusers in one or more lines with at least one diffuser in each.
  • the number 10 indicates as a whole a warm air diffuser for the application of the system according to the invention.
  • the said diffuser 10 comprises an airtight tubular body 11 with a flexible wall, which is for example essentially cylindrical, and open at one of its axial ends 11.1, which forms a static intake for ambient air. At the opposite end, the said diffuser 10 is closed by an airtight cap 11.2.
  • the said diffuser 10 is made from fabric double-coated with polyvinyl chloride (PVC), with a high-frequency welded fireproof polyester insert (operating temperature from -10 to 80°C).
  • PVC polyvinyl chloride
  • the said diffuser 10 is suspended in the upper area of a heated, air-conditioned and/or ventilated environment. It is connected, for example, to a galvanized steel suspension cable F by a plurality of suspension hooks G, engaged in corresponding reinforced eyelets provided along a longitudinal rib 11.3 of the diffuser. The diffuser is suspended parallel to the said cable F.
  • a linear arrangement of static apertures (nozzles) for air diffusion 12 is provided along the tubular body 11 of the said diffuser 10.
  • the said diffusion apertures 12 are oriented towards the lower layers of air in the environment concerned.
  • An axial electric fan 13 is placed facing the said static ambient air intake 11.1 of the diffuser 10 and is suspended by elastic positioning cable means. When its motor is switched on, the said fan 13 causes a forced suction of warm air drawn from the upper area of the environment concerned, and conveys it through the said air intake 11.1 and through the said diffuser 10 in the form of a corresponding continuous flow of warm air.
  • the diffuser 10 is thus kept continuously inflated with air in the form of a windsock.
  • a continuous flow C in the form of a cone of primary air passes out through each diffusion aperture 12 and enters the lower layers of the air in the environment concerned.
  • This flow C also generates an ambient air recirculation field by an inductive phenomenon at the aperture 12, since it forms a low-pressure area D in the vicinity of the aperture by the "Venturi" effect.
  • This causes the return of a continuous flow S of layered air into the high part of the room concerned and its mixing with the primary air flow C (as shown by way of example by the arrows R in Fig. 1).
  • Fan model AFQ - 450 - 30/4m - B type: forced draught propeller fan with protective grille single phase, 4 pole, 230 V 50 Hz delivery, m 3 /hr: 4,000 static: 100 pascals (max.) power input: 450 watts weight: 12 kg noise level at 3 m: 58 dB Diffuser: made from high-toughness Trevira double-coated with PVC class 2 - CSE RF1 - 75 A CSE RF 3 /// weight in grams 500 g/m 2 min.
  • the system according to the invention produces a thorough delayering as a result of high induction for environments up to a height of 18 m. It provides a uniform distribution of the ambient air in the area concerned, by the "plenum" effect, with a maximum residual velocity of 0.25 m/s.
  • a plurality of diffusers 10 are arranged in line and, in a single environment, a plurality of lines, each having one or more diffusers 10, can be formed.
  • the relative lightness of the diffuser 10 enables it to be suspended easily and safely and to be made in shapes with a large linear extension.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Treating Waste Gases (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Threshing Machine Elements (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Advancing Webs (AREA)
EP99125755A 1999-01-28 1999-12-23 Diffuseur d'air Expired - Lifetime EP1024334B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999TO000061A IT1307121B1 (it) 1999-01-28 1999-01-28 Sistema di ricircolazione d'aria ambiente, particolarmente perambienti civili ed industriali di media e grande cubatura, e
ITTO990061 1999-01-28

Publications (3)

Publication Number Publication Date
EP1024334A2 true EP1024334A2 (fr) 2000-08-02
EP1024334A3 EP1024334A3 (fr) 2002-09-04
EP1024334B1 EP1024334B1 (fr) 2007-02-14

Family

ID=11417395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125755A Expired - Lifetime EP1024334B1 (fr) 1999-01-28 1999-12-23 Diffuseur d'air

Country Status (4)

Country Link
EP (1) EP1024334B1 (fr)
AT (1) ATE354064T1 (fr)
DE (1) DE69935123D1 (fr)
IT (1) IT1307121B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6071832A (ja) * 1983-09-29 1985-04-23 Nippon Haigou Shiryo Kk 軟質ダクトを備えた換気装置
JPH03110343A (ja) * 1989-09-20 1991-05-10 Mitsubishi Rayon Eng Co Ltd 気体吹き出しダクト部材
WO1992014973A1 (fr) * 1991-02-14 1992-09-03 ABB Fläkt AB Procede et dispositif de repartition pour l'alimentation en air d'une piece
US5769708A (en) * 1996-10-22 1998-06-23 Rite-Hite Corporation Fabric air dispersion system with air dispersing panels

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6071832A (ja) * 1983-09-29 1985-04-23 Nippon Haigou Shiryo Kk 軟質ダクトを備えた換気装置
JPH03110343A (ja) * 1989-09-20 1991-05-10 Mitsubishi Rayon Eng Co Ltd 気体吹き出しダクト部材
WO1992014973A1 (fr) * 1991-02-14 1992-09-03 ABB Fläkt AB Procede et dispositif de repartition pour l'alimentation en air d'une piece
US5769708A (en) * 1996-10-22 1998-06-23 Rite-Hite Corporation Fabric air dispersion system with air dispersing panels

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 213 (M-408), 30 August 1985 (1985-08-30) & JP 60 071832 A (NIHON HAIGOU SHIRIYOU KK), 23 April 1985 (1985-04-23) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 303 (M-1142), 2 August 1991 (1991-08-02) & JP 03 110343 A (MITSUBISHI RAYON ENG CO LTD), 10 May 1991 (1991-05-10) *

Also Published As

Publication number Publication date
IT1307121B1 (it) 2001-10-29
ITTO990061A1 (it) 2000-07-28
ATE354064T1 (de) 2007-03-15
EP1024334B1 (fr) 2007-02-14
DE69935123D1 (de) 2007-03-29
EP1024334A3 (fr) 2002-09-04

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