EP2224183A1 - Système de distribution d'air et conduit diffuseur pour celui-ci - Google Patents

Système de distribution d'air et conduit diffuseur pour celui-ci Download PDF

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Publication number
EP2224183A1
EP2224183A1 EP10154832A EP10154832A EP2224183A1 EP 2224183 A1 EP2224183 A1 EP 2224183A1 EP 10154832 A EP10154832 A EP 10154832A EP 10154832 A EP10154832 A EP 10154832A EP 2224183 A1 EP2224183 A1 EP 2224183A1
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EP
European Patent Office
Prior art keywords
air
access
diffuser
channelling
conduit
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
EP10154832A
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German (de)
English (en)
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EP2224183B1 (fr
Inventor
Marco Zambolin
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Individual
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Individual
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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
    • F24F13/0218—Flexible soft ducts, e.g. ducts made of permeable textiles
    • 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
    • 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
    • F24F13/0254—Ducting arrangements characterised by their mounting means, e.g. supports
    • 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 air flow distribution, preferably, though not exclusively, of treated air for conditioning an environment, such as for example cooled air, heated air, and the like.
  • the invention relates to an air treatment plant provided with a trap door or discharge shutter for regulating a residual velocity of air in an environment, enabling ground-level regulation of air flow.
  • Air distribution plants usually comprise an appropriate channelling by which a flow of air is transferred from a device designed to provide energy to the air flow in the form of pressure increase (for example a ventilator) to a zone of use thereof, such as for example a particular room, an office, a laboratory, a workshop or the like.
  • a device designed to provide energy to the air flow in the form of pressure increase for example a ventilator
  • a zone of use thereof such as for example a particular room, an office, a laboratory, a workshop or the like.
  • the channelling is usually constituted by one or more transport conduits made of sheet metal and by one or more terminal vent elements, such as perforated diffuser channels made of sheet metal or textile.
  • the transport conduits are connected to the ventilator and are in fluid communication with the diffuser conduits.
  • Diffuser conduits can be made of a metal material or a flexible material (for example a textile) according to installation needs (for example textile for other uses at up to 40 metres high, metal for rooms of up to 10 metres high with slower air flow.
  • the diffuser conduits whether made of metal or flexible materials, have the task of homogeneously distributing the air into the use zone, and, for this aim, are provided by a plurality of diffuser holes arranged along one or more walls of the conduit.
  • the diffuser holes enable the air to flow internally of the diffuser conduit to flow out of the conduit and diffuse in the use zone.
  • the air exiting the diffuser holes recalls the air from the environment surrounding the diffuser by inductive effect, and moves it towards the zones to be conditioned, mixing it with the air exiting the diffuser; in general terms, a succession of flows and/or micro-whirls are created which, as they generate turbulence, facilitate mixing of the air in inflow into the zone of use with the air already present in the zone of use, and resulting in a uniform temperature.
  • outlet velocity of the air from the distributor holes must also respond to the requirement not to directly strike the persons internally of the use zone with excessive velocity or with unpleasant draughts.
  • the air outflow velocity from the diffuser holes must be at a differently-calculated for each plant, with the aim of obtaining residual velocity values at ground level (normally measured at a height of 1.5 metres) which can guarantee optimal comfort conditions for persons.
  • the diffuser holes are optimised such that the air in outflow from the diffuser holes is always close to, though below, an outflow velocity capable of leading to unpleasant residual ground-level velocities (in general, though not necessarily, the ground-level residual velocity must be maintained in a range between 0.15 e 0.35 m/s according to the type of room to be conditioned.
  • the characteristics of the diffuser holes are optimised such as to have a residual ground-level velocity which can be considered optimal.
  • the perturbing elements can vary over time and can also lead to generation of air draughts which might require a change in the perforations, with consequent problems of changes to the original design and operations to the structure.
  • the technical objective at the basis of the present invention is to provide an air distribution plant which obviates the drawbacks in the prior art as described above.
  • the present invention aims to provide an air distribution plant in which the residual ground-level velocity in the use zone is always adjustable in such a way as to respond to the users' needs at all times and optimally.
  • An objective of the invention is thus to enable greater freedom in the diffuser design while enabling optimal regulation thereof after installation has been completed.
  • a further aim of the invention is to enable recuperation of treated air possibly expelled from the channels in the higher part of the room by effect of high induction guaranteed by the air outflow velocity from the holes (a particularity of high-induction plants is to enable aspiration of environmental air in a volume of up to 30 times the quantity of air outflowing from the holes).
  • a further aim of the present invention is to provide an air distribution plant which can easily be set up and regulated in terms of air outflow velocity from the holes.
  • an air distribution plant of the present invention is denoted in its entirety by number 1.
  • the plant 1 comprises a channelling 2 through which an air flow is transferred from a device destined to transmit energy to the air flow in the form of an increase of pressure to a use zone.
  • the device is, for example, constituted by one or more ventilators 100.
  • use zone in the context of the present invention reference is made to the environment into which the air flow is transferred. Examples of use zones could be a workshop, an office, a shop, a warehouse or the like.
  • the channelling 2 comprises at least a transfer conduit 3 located in fluid communication with the above-cited device and at least a diffuser conduit 4 placed in fluid communication with the transfer conduit 3.
  • the transfer conduit or conduits 3 are generally constituted by tracts of channel 5 having a polygonal or circular section, and by hollow connecting sections 6 between the tracts of channel 5.
  • the hollow sections 6 have the function of joining the tracts of channel 5 together, even where these exhibit different transversal dimensions.
  • the transfer conduits 3 are preferably made of a metal material (sheet metal) and are generally without breather openings for the air; thus they transfer the whole air flow towards the true and proper diffusers 4. Further, often the transfer conduits 3 are already installed in the structure to be conditioned, thus constituting an a priori constraint for the design of the diffuser conduits 4.
  • the sheet metal channel 3 carries low-velocity air (5-10 m/s) towards the diffusers 4.
  • the diffusers 4 are generally elements which receive the air flow in arrival from the conduits 3 and diffuse it into the environment via appropriate holes set in communication with the outside environment.
  • Perforated diffuser conduits 4 are hollow pipes having circular, semi-circular, polygonal or other section, and are set in fluid communication with the transfer conduits 3 via connecting portions 7.
  • the connecting portions 7 are for example connections for air dispensing from the transfer conduits, as illustrated in figures 1 , 2a and 2b .
  • the diffuser conduits 4 are provided with a plurality of diffuser holes 8 arranged on at least an external wall of the conduit itself.
  • Diffusion systems can be of a "classic" type, in which the channels are transport elements and entrusting the air diffusion quality to the terminal element.
  • the channels divide the air flow according to the division of loads into the room and the diffuser thrusts the delivery air towards the ground with the aim of spreading the air delivery into the zone that it has been attributed to.
  • the delivery air exiting from the holes at high velocity creates strong micro-whirls which cause a significant depression close to the perforated zone, which aspirates air by induction at rates of about 30 times above the quantity of blown air.
  • the air exiting from the diffuser holes 8 creates an inductive effect on the surrounding air, leading to a mixing and a uniform diffusion internally of the use zone, with a severe drop in flow velocity at a distance of a few centimetres from the holes.
  • the diffuser holes 8 are preferably organised in rows ( figures 1 and 2 show two, three or four rows of holes 8) and preferably involve all or nearly all of the longitudinal development of each diffuser conduit.
  • the diffuser holes 8 can have different dimensions to one another ( figures 2a and 2b ) according to design requirements and also note that a transfer conduit can be interposed between a diffuser conduit 4 and a next connected thereto in series.
  • the choice of geometric configuration of the channelling 2, i.e. the choice of connecting in series or in parallel a plurality of perforated diffuser conduits 4, of interposing transport conduit 3 between two perforated diffuser conduits 4, depends on the position of the ventilator device, the position of the use zone and the configuration thereof.
  • the channelling 2 advantageously comprises at least a discharge trap door (101) defined by an access 9 and a corresponding opening system 11 of the access 9.
  • the access 9 has larger dimensions that those of each diffuser hole 8 and is afforded on an external wall 10 of the channelling; the access 9 preferably has dimensions that are at least 10 times, or more, greater than the dimensions of each of the diffuser holes 8, i.e. the access 9 has an area for the outflow of air which is at least 10 times greater than the area of a diffuser hole 8.
  • the opening exhibits a shape which is in plan view substantially rectangular and has dimensions such as to prevent any production of whistling or sound vibrations during the outflow of the air when the plant is in use.
  • a length of between 35 and 55 mm (and preferably between 40 and 50 mm with an optimal length of 45mm) and a breadth comprised between 15 mm and 35 mm (and preferably between 20 and 30 mm with an optimal breadth of 25 mm) have been shown to be suitable.
  • the opening system 11 associated to the access 9 is mobile between a plurality of stable positions comprised between a closed position of the opening and an open position thereof.
  • the quantity of air unleashed into the environment in the high zone of the room can be varied.
  • the plant is able correctly to diffuse air into the use zone, i.e. in such a way that the air outflow velocity from the diffuser holes 8 is just less than the "critical" velocity (i.e. the value of velocity, variable according to the situation, which leads to a user's being struck by an air flow having a residual ground-level air flow considered unpleasant).
  • critical velocity i.e. the value of velocity, variable according to the situation, which leads to a user's being struck by an air flow having a residual ground-level air flow considered unpleasant.
  • the outflow from the access 9 of a certain quantity of air reduces the air flow towards the diffuser holes and thus optimises the inductive effect according to requirements.
  • the discharge trap door 101 operates such as to adjust the residual velocity of the air in the environment, either reducing or eliminating (according to requirements) the draughts which might be present.
  • the perforated diffuser conduits 4 are made of a metal material and, for example, have a substantially hollow cylindrical form.
  • the access or accesses 9 are preferably afforded on one or more perforated diffuser conduits 4.
  • the perforated diffuser conduits 4 are realised in flexible material, for example a textile material.
  • the plant further comprises a hollow connecting element 12 for connecting up the transport channel 3 and the diffuser conduit 4 (see figure 5 ).
  • the connecting element 12 has the function of stably constraining the transport conduit 2, made of a metal material, to the diffuser conduit 4, which is made of a flexible material.
  • the diffuser conduit 4 can be tapered (hollow truncoconical), as shown in the figure.
  • the access 9 is afforded on the connecting element 12, which is preferably located in the use zone.
  • constraining means 13 are provided to constrain the perforated diffuser conduits 4, and possibly the transport conduits 3, to the ceiling of the use zone.
  • the accesses 9 (which can be in any number according to design needs) are located in a channelling portion 2 that substantially faces the ceiling of the use zone.
  • the air outflow from the accesses 9 is not directly aimed towards the users occupying the use zone, and in any case, should the access 9 be in proximity of the diffuser holes 8, the inductive effect created thereby recalls the air that has exited from the access 9, and re-directs it towards the use zone, thus preventing any waste of energy.
  • the discharge channels can be provided with a plurality of the discharge trap doors 101 such as to enable injection of the desired quantity of air into the environment, into the zones considered to be most appropriate, thus correspondingly reducing the outflow velocity from the diffuser holes.
  • the air discharged into the environment is, as explained herein above, recuperated by inductive effect thanks to the perforated diffuser conduits 4, and homogenized to the flow, thus preventing energy loss.
  • the discharge trap door 101 is provided with a shutter 14 ( figures 3 and 4 ) which is slidable between the plurality of stable positions which define various discharge conditions for the air into the environment.
  • the shutter 14 (sometimes known as a guillotine) is slidable between a plurality of positions which, once attained, are stably maintained.
  • These positions are comprised between a position of complete closure of the access 9 and a position of almost total or maximum aperture of the access 9.
  • the opening system 11 further comprises two sliding guides 15 for the shutter 14 (illustrated in a broken line in figure 3 ).
  • the shutter 14 is able to slide along the two guides 15, which develop along opposite edges of the shutter 14.
  • the two guides have a longitudinal development which is parallel to the sliding direction of the shutter 14.
  • At least one of the two guides 15 is provided with at least an elastic element 16 for compressing the shutter 14 against an edge 17 of the access 9 and for keeping it stably in the position reached (see figure 4 ).
  • the elastic elements 16 are preferably an elastic element 16 for each of the two guides 15 and they are in permanent contact with the slide 14 along respective single lines of contact.
  • the elastic elements 16 are constituted by a metal band 18 which develops from a constraint portion 19 of each guide 15.
  • the constraint portion 19 develops parallel to the wall 10 of the channelling portion on which the guide is constrained.
  • the metal band 18 is inclined with respect to the constraint portion 19 (see figure 4 ) and comprises a first end which bears on the shutter 14, pressing it against the wall 10 of the channelling portion 2.
  • a second end, opposite the first, is constrained to and is preferably in a single piece with the constraint portion 19 through a spacer band 320 ( figure 4 ).
  • the guides 15 are preferably constrained to an internal surface of the wall 10 of the channelling 2 in order to arrange the shutter 14 internally of the channelling 2 in a substantially parallel position to the wall 10 of the channelling 2.
  • the guides 15 are stably constrained, for example by rivets, to the internal surface of the wall 10 of the channelling 2 by means of the constraint portions 19 (see figure 4 ).
  • the shutter 14 can be moved by activating means 21 which are removably engageable by a moving tool ( figure 3 ).
  • the shutter 14 can be displaced, thus regulating the opening space only by using a moving tool; this prevents the shutter 14 from being accidentally moved once the plant has been set up and adjusted.
  • the activating means 21 are constituted by a hole 22 made in the shutter 14 in proximity of an end zone thereof.
  • the movement tool can be any tool (for example a screwdriver) destined to engage the hole 22 and to transmit a force to the shutter 14 which is directed along the guide 15.
  • the invention attains the set aims.
  • the plant is thus able to diffuse air into the use zone correctly, i.e. such that the outlet velocity of the air from the diffuser holes 8 is such as to guarantee residual ground-level velocity that is either not perceived or at least is not unpleasant.
  • the air that has exited from the access 9 can be recuperate thanks to the inductive effect guaranteed by the diffuser holes.
  • the presence of an access internally of the channel advantageously constitutes a visual inlet for inspecting the channel.
EP20100154832 2009-02-26 2010-02-26 Système de distribution d'air et conduit diffuseur pour celui-ci Active EP2224183B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2009A000275A IT1393105B1 (it) 2009-02-26 2009-02-26 Impianto di distribuzione di aria comprendente una botola di scarico per la regolazione delle correnti di aria in ambiente

Publications (2)

Publication Number Publication Date
EP2224183A1 true EP2224183A1 (fr) 2010-09-01
EP2224183B1 EP2224183B1 (fr) 2015-05-06

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EP20100154832 Active EP2224183B1 (fr) 2009-02-26 2010-02-26 Système de distribution d'air et conduit diffuseur pour celui-ci

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EP (1) EP2224183B1 (fr)
IT (1) IT1393105B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3003017A1 (fr) * 2013-03-05 2014-09-12 Eric Fenioux Gaine de ventilation pour installations destinees a des animaux et systeme de ventilation comportant ladite gaine
EP3054234A1 (fr) * 2015-02-09 2016-08-10 Marco Zambolin Dispositif de traitement de l'air, procédé de traitement de l'air et l'utilisation dudit dispositif
FR3101937A1 (fr) 2019-10-10 2021-04-16 Ludovic Boulanger Dispositif de ventilation de bâtiment
EP4071420A1 (fr) 2021-04-08 2022-10-12 Air'technologies Conduit diffuseur pour diffuser de l'air conditionné
EP4269900A1 (fr) 2022-04-28 2023-11-01 Air'technologies Conduit diffuseur pour diffuser de l'air conditionné

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357088A (en) * 1964-10-02 1967-12-12 Whirlpool Co Method of attaching a hanger to an elongated flexible tube wall
WO1993015366A1 (fr) * 1992-02-03 1993-08-05 Ke-Burgman A/S Procede et tube d'injection d'air
US20040181921A1 (en) * 2003-03-21 2004-09-23 Alles Harold G. Installation of a retrofit HVAC zone control system
US20060057954A1 (en) * 2004-09-13 2006-03-16 Nickolaj Hrebeniuk View port window with optional illumination and alarm system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357088A (en) * 1964-10-02 1967-12-12 Whirlpool Co Method of attaching a hanger to an elongated flexible tube wall
WO1993015366A1 (fr) * 1992-02-03 1993-08-05 Ke-Burgman A/S Procede et tube d'injection d'air
US20040181921A1 (en) * 2003-03-21 2004-09-23 Alles Harold G. Installation of a retrofit HVAC zone control system
US20060057954A1 (en) * 2004-09-13 2006-03-16 Nickolaj Hrebeniuk View port window with optional illumination and alarm system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3003017A1 (fr) * 2013-03-05 2014-09-12 Eric Fenioux Gaine de ventilation pour installations destinees a des animaux et systeme de ventilation comportant ladite gaine
FR3003018A1 (fr) * 2013-03-05 2014-09-12 Eric Fenioux Gaine de ventilation pour installations destinees a des animaux et systeme de ventilation comportant ladite gaine
EP3054234A1 (fr) * 2015-02-09 2016-08-10 Marco Zambolin Dispositif de traitement de l'air, procédé de traitement de l'air et l'utilisation dudit dispositif
FR3101937A1 (fr) 2019-10-10 2021-04-16 Ludovic Boulanger Dispositif de ventilation de bâtiment
EP4071420A1 (fr) 2021-04-08 2022-10-12 Air'technologies Conduit diffuseur pour diffuser de l'air conditionné
EP4269900A1 (fr) 2022-04-28 2023-11-01 Air'technologies Conduit diffuseur pour diffuser de l'air conditionné

Also Published As

Publication number Publication date
EP2224183B1 (fr) 2015-05-06
IT1393105B1 (it) 2012-04-11
ITMI20090275A1 (it) 2010-08-27

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