EP0899519B1 - Air-conveying and distributing channel - Google Patents
Air-conveying and distributing channel Download PDFInfo
- Publication number
- EP0899519B1 EP0899519B1 EP97830388A EP97830388A EP0899519B1 EP 0899519 B1 EP0899519 B1 EP 0899519B1 EP 97830388 A EP97830388 A EP 97830388A EP 97830388 A EP97830388 A EP 97830388A EP 0899519 B1 EP0899519 B1 EP 0899519B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elongated body
- channel
- air
- holes
- series
- 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.)
- Expired - Lifetime
Links
Images
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
- F24F13/0254—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
- F24F13/0218—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
- 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-conveying and distributing channel.
- thermal-ventilation plants which are comprised of channels or ducts capable of distributing predetermined amounts of air optionally previously processed from a thermal point of view, following a given logic.
- Metal ducts at a side surface thereof are provided with openings for discharge of the air they convey and along their longitudinal extension they have a substantially constant section over pieces of predetermined length suitably connected with each other.
- metal-made distributing ducts or channels are very expensive and of great weight so that employment of very strong support means is required, which will contribute to increase weight of same and the setting-up costs for the overall structure.
- metal ducts must necessarily process air at relatively low velocities in order to avoid problems connected with high losses of head and also, in particular at the air discharge openings, problems of the acoustic type because if air passes through said openings at a very high exit velocity, a maddening noise would occur as a result of vibrations of the metal sheet at said discharge openings.
- channels of deformable material can ensure a greater amount of processed air per unit time, their section being the same, because the materials used to make them are intrinsically capable of absorbing vibrations, due in particular to the deformable character characterizing them, thereby solving problems of the acoustic type at the air-distribution holes provided in the channel wall.
- the above described channels are usually of cylindrical conformation and have one open end or delivery end which is put into fluid communication with the conditioning plant with which the channel is associated, and a second end which is terminally closed.
- the apparatus presents a tubolar body which is composed of a metallic base covered by a flexible portion made of textile material.
- the metallic base is constant in section and presents holes or openings for disharge of the air that the tubolar body conveys.
- the upper flexible portion is airtight and presents a section which progressively decreases away from the air feeding means.
- channels of deformable material are taking an increasingly more important role within the field of thermal-ventilation plants.
- the operating efficiency of the channels of known type is not constant over their longitudinal extension. This is due to the fact that the flow rate entering the delivery end decreases as it moves on along the channel, due to the distribution perforations present in the side wall of said channel. It is therefore apparent that the fluid-movement conditions existing within the channel, in particular in terms of flow velocity, are adversely affected to a great extent by this factor so that there is a varying air distribution through the delivery holes along the longitudinal extension of the channel.
- the present invention aims at substantially solving all the above mentioned drawbacks.
- an air-conveying and distributing channel in accordance with the present invention has been generally identified by reference numeral 1.
- the conveying channel 1 comprises an elongated body 2 of tubular conformation and flexible structure.
- the elongated body 2 has at least one end 2a for air delivery as well as a second end 2b opposite to the first end which is generally closed.
- support means generally denoted by 3, which is arranged to enable engagement of the elongated body with a wall or a ceiling, for example.
- support means 3 of different conformation may be provided, as specifically shown in Figs. 1 to 9.
- the elongated body 2 can have a transverse section either of circular conformation (Figs. 5 and 6), semicircular conformation (Fig. 8), in the form of a quarter of a circumference (Fig. 9), in the form of an arc of a circumference connected to a straight line (Fig. 3), in the form of an arc of a circumference connected to a curved line (Fig. 7), or of any other conformation, depending on the operating requirements that may occur each time.
- the support means advantageously comprises at least one guide rail or steel cable 4, at least one engagement portion 5 emerging from the elongated body and having a predetermined number of elongated engagement holes 5a, and a plurality of carriages 6 which are each in engagement with at least a corresponding one of said elongated holes 5a and also slidably associated with said rail 4.
- rail 4 normally consists of at least one section member defining slide tracks 7 in which the rolling elements 8 of each carriage 6 engage. It is to note that, depending on the conformations in transverse section of the elongated body 2, employment either of a single rail 4 or of a pair of rails set in place at symmetrically opposite positions, or even of three rails as shown in Fig. 9, may be provided.
- the elongated body 2 is also provided with air-delivery means generally identified by 9, which is operatively associated with at least one side wall of the elongated body to create a fluid communication between chamber 10 at the inside of duct 2 and the external environment, for the purpose of carrying out the desired air distribution.
- the delivery means 9 advantageously comprises a first and a second series of holes 11 and 12 homogeneously distributed along the side wall of the elongated body 2.
- Holes 11 of the first series have an air-passage section of a lower area than the air-passage section of the holes of the second series. In this way, the holes of the first series are passed through by an air flow of high speed and great turbulence.
- Holes 12 of the second series are passed through by flows of greater flow rate but at a greatly lower velocity, as compared with that of flows passing through holes 11.
- the holes of the second series are normally disposed close to those of the first series, according to a varying arrangement and geometry, depending on requirements. More generally, the holes of the second series are used to direct and establish a throw for the flow coming out of the elongated body 2.
- the holes of the first and second series are distributed in respective rectilinear lines disposed mutually in side by side relationship.
- the delivery means may also be provided to comprise a plurality of through openings disposed mutually in side by side relationship and defining at least one longitudinal grating that can extend along the side wall of the elongated body 2. In some cases, two or more longitudinal gratings conveniently disposed along the side surface of the elongated body 2 may be also provided.
- the elongated body 2 has a transverse section of decreasing area away from the first end 2a.
- This type of solution makes it possible to carry out that which is defined by those skilled in the art as a "dynamic recovery", i.e. the duct capability to substantially keep the flow velocity constant along the longitudinal extension of body 2, in spite of the fluid mass gradually coming out of holes 11 and 12.
- the transverse section will be linearly decreasing so that the elongated body will have a substantially frusto-conical conformation.
- the transverse section may be provided to decrease in a different manner from the one described above.
- the elongated body is made of a sheet material comprising an inner layer, made of a fabric material for example, and an outer covering layer, of an impermeable material for example. More specifically, for making the inner fabric layer synthetic fibres can be utilized such as glass fibres and polyester yarns, while the covering layer may be made of PVC, silicone, polyurethane or still other materials.
- the fabric layer will be covered with a covering layer preferably by coating.
- the sheet may be also completely made of a plastic material such sized as to ensure an appropriate strength and good flexibility, and provided or not with porosities distributed in a more or less homogeneous manner, depending on requirements.
- the elongated body 2 will be arranged so that it extends substantially horizontally or substantially vertically, depending on the operating requirements and the available spaces, without any modification to the overall structure of channel 1 being needed because, due to the conformation of the elongated body and support means 3, this channel adapts itself to any type of disposition very well.
- the elongated body 2 can be provided with a condensate-collecting element 13 which is disposed below the elongated body itself (see Fig. 10).
- the elongated body will have one side 14 facing the collecting element that will slope from bottom to top away from the first end 2a, whereas the opposite side 15 is maintained in a horizontal position to enable an appropriate engagement with a ceiling, for example.
- the collecting element 13 preferably extends along the elongated body parallelly to said side 14 so that it slopes from bottom to top as well, away from the first end of the elongated body.
- the collecting element may be a section member of metal or plastic material for example, coupled by fitting with a corresponding projection 16 integral with the side wall of the elongated body 2 or linked to one or more rails 4 by a predetermined number of supporting belts 17.
- channel 1 Under operating conditions, after channel 1 has been set up, air is sent into the elongated body 2 through the first end 2a so that the channel passes from a deflated condition shown in chain line in the illustrative figures 5, 6, 7 and 8, to an inflated condition shown in solid line.
- holes 11 and 12 of the first and second series are partly and progressively discharged through holes 11 and 12 of the first and second series.
- holes of the first series cause a strong induction effect so that a great air mass is involved
- holes 12 of the second series serve to direct the air collected from holes 11 and establish the distance said air is to be sent.
- the invention achieves important advantages.
- channel 1 substantially solves all drawbacks typical of the prior art and, as already said, succeeds in ensuring an excellent operating efficiency and behavioural uniformity along the whole extension of body 2, while at the same time, due to the presence of the first and second holes, solving all thermal-stratification problems.
- channel 1 substantially ensures the absence of problems connected with condensate formation due to the presence of humidity in the air, since a very intense dynamic condition exists around the side surface of the elongated body 2.
- the particular conformation of the channel in reference is advantageous in the starting step before normal working conditions have been reached because the progressive section reduction ensures an important stiffness, the materials being the same, and therefore practically minimum waving problems, which will result in easier setting up. It is to point out that if the transverse section at the second end 2b is reduced to such a point that a body 2 of conical conformation is defined, the waving effects due to creation of a condition of overpressure at the end 2b will be reduced to a minimum.
- the particular conformation of the support means 3 provided with rails 4 and carriages 6 is economical from a construction point of view and very efficient as regards operation so that the overall costs are reduced and a strong structure, reliable in time, is ensured.
- rails create a better support and ensure a correct expansion of the channel body relative to supports using a steel cable.
- the elongated body is made of two layers, a great strength and at the same time an appropriate flexibility is ensured to the structure which, obviously, is advantageous for a correct operation of the channel.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Duct Arrangements (AREA)
Description
- Fig. 1 is a partly exploded perspective view of a channel in accordance with the present invention;
- Fig. 1a shows the support means operatively associated with the channel seen in Fig. 1, to an enlarged scale;
- Figs. 2, 3 and 4 show some alternative embodiments of a channel in accordance with the invention, still in a perspective view similar to Fig. 1;
- Figs. 2a, 3a and 4a show the support means relating to Figs. 2, 3 and 4 respectively, to an enlarged scale;
- Figs. 5 to 9 show different types of shapes in transverse section that a channel in accordance with the invention can take, depending on requirements, and the corresponding different types of support means;
- Fig. 10 is a diagrammatic side view of a channel in accordance with the invention, provided with condensate-collecting means;
- Fig. 11 is a front view relating to the channel in Fig. 10;
- Fig. 12 is a front view similar to Fig. 11, relating to an alternative embodiment of the condensate-collecting means.
Claims (10)
- An air-conveying and distributing channel comprising:an elongated body (2) of tubular conformation having at least one end (2a) for air delivery;a support means (3) operatively associated with said elongated body;air-delivery means (9) operatively associated with at least one wall of said elongated body to carry out distribution of said air towards an external environment, said elongated body (2) having a transverse section of a decreasing area away from said one end, characterized by the fact that the elongated body is entirely made of flexible material and in that the transverse sections of the elongated body (2) progressively decrease substantially in each point of their outline proceeding away from said air delivery.
- A channel as claimed in claim 1, characterized in that said elongated body (2) has a transverse section linearly decreasing away from said one end, and preferably has a substantially frusto-conical conformation.
- A channel as claimed in claim 1, characterized in that said elongated body (2) is made of a sheet of plastic material or, alternatively, of at least one inner layer of fabric material and at least one covering layer of an impermeable material externally applied to said inner layer.
- A channel as claimed in claim 1, characterized in that said air-delivery means (9) comprises at least one first series of holes (11) distributed along a wall of said elongated body 82).
- A channel as claimed in claim 1, characterized in that said air-delivery means (9) comprises at least one second series of holes (12) distributed along a wall of the elongated body (2), in that the holes of said first series have an air-passage section of a lower area than the holes of said second series, and in that preferably the holes of said first and said second series are distributed following respective rectilinear lines disposed mutually in side by side relationship.
- A channel as claimed in claim 1, characterized in that said delivery means (9) comprises porosities distributed at least over one side surface of said elongated body.
- A channel as claimed in claim 1, characterized in that said delivery means (9) comprises a plurality of through openings disposed mutually in side by side relationship and defining at least one longitudinal grating extending along at least one wall of said elongated body.
- A channel as claimed in claim 1, characterized in that said support means (3) comprises:at least one guide rail or one steel guide cable (4);at least one engagement portion (5) radially emerging from a side wall of said elongated body and defining a predetermined number of elongated engagement holes (5a); anda plurality of carriages (6) each engaged with at least one of said corresponding elongated holes and slidably associated with said rail.
- A channel as claimed in claim 1, characterized in that operatively associated with said elongated body (2) is a condensate-collecting element (13) disposed under the elongated body itself.
- A channel as claimed in claim 1, characterized in that, under operating conditions, the elongated body (2) extends substantially horizontally or substantially vertically.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97830388A EP0899519B1 (en) | 1997-07-24 | 1997-07-24 | Air-conveying and distributing channel |
DE69702056T DE69702056D1 (en) | 1997-07-24 | 1997-07-24 | Air duct for distributing and distributing air |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97830388A EP0899519B1 (en) | 1997-07-24 | 1997-07-24 | Air-conveying and distributing channel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0899519A1 EP0899519A1 (en) | 1999-03-03 |
EP0899519B1 true EP0899519B1 (en) | 2000-05-17 |
Family
ID=8230732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97830388A Expired - Lifetime EP0899519B1 (en) | 1997-07-24 | 1997-07-24 | Air-conveying and distributing channel |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0899519B1 (en) |
DE (1) | DE69702056D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9039503B2 (en) | 2008-02-29 | 2015-05-26 | Rite-Hite Holding Corporation | Longitudinally split fabric air duct |
DE102021121007A1 (en) | 2021-08-12 | 2023-02-16 | Ford Global Technologies, Llc | Ventilation device for ventilating an interior space |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6280320B1 (en) * | 1999-07-13 | 2001-08-28 | Rite-Hite Holding Corporation | Frame to support a deflated fabric air duct |
NL1013242C2 (en) * | 1999-10-08 | 2001-04-23 | Joule Venture Holding B V | Air duct. |
FR2800854B1 (en) * | 1999-11-08 | 2002-01-04 | Diffusion Thermique Ouest Sa | AIR DIFFUSION SYSTEM |
US6558250B1 (en) | 2000-10-23 | 2003-05-06 | Nicolas B. Paschke | Fabric flow restriction and method for restricting a fabric duct |
US6565430B2 (en) | 2001-09-13 | 2003-05-20 | Rite-Hite Holding Corporation | Pliable air duct with dust and condensation repellency |
US6960130B2 (en) | 2003-05-12 | 2005-11-01 | Rite-Hite Holding Corporation | Fabric air duct with directional vent |
US20060252365A1 (en) * | 2005-05-04 | 2006-11-09 | Gebke Kevin J | Pliable air duct with pressure responsive discharge outlets |
SE530545C2 (en) * | 2006-05-03 | 2008-07-01 | Bengt Selloe Ab | Fittings for hanging a supply air device |
US9518756B2 (en) * | 2006-11-15 | 2016-12-13 | Rite-Hite Holding Corporation | External rib cage for an inflatable air duct |
FR2915272B1 (en) * | 2007-04-18 | 2012-12-28 | Groupe Solu Allience | DEVICE FOR VENTILATION OF CELL. |
PL387210A1 (en) * | 2009-02-05 | 2010-08-16 | Dospel Spółka Z Ograniczoną Odpowiedzialnością | System of elements of ventilation channel |
IT1397501B1 (en) * | 2009-04-14 | 2013-01-16 | Zambolin | AIR TREATMENT PLANT |
DE102010006360A1 (en) * | 2010-01-29 | 2011-08-04 | H. Lüdi + Co. AG Gas- und Energiesysteme | Mediendecke with a flexible supply air duct |
ITVI20100053A1 (en) * | 2010-02-26 | 2011-08-27 | Luca Tondin | DIFFUSER OF AIR |
CZ304937B6 (en) * | 2013-11-01 | 2015-01-28 | Příhoda S.R.O. | Air-conditioning system part |
DE202015101719U1 (en) * | 2015-04-08 | 2016-07-13 | ORAVEN GmbH | air distribution system |
IT201700111217A1 (en) * | 2017-10-04 | 2019-04-04 | Oneair S R L | MICROFORATED DIFFUSER DUCT FOR AIR DISTRIBUTION SYSTEMS AND ALSO OPTIONAL FOR LIGHTING, RELATED DUCTING AND RELATED PRODUCTION METHODS |
IT201800002955A1 (en) * | 2018-02-22 | 2019-08-22 | Oneair S R L | AIR DIFFUSION DUCT, RELATED DIFFUSION DUCTING AND AIR DISTRIBUTION SYSTEM |
FR3078087B1 (en) * | 2018-02-22 | 2020-03-20 | Skot | AERATION SYSTEM FOR A BUILDING |
IT202000008260A1 (en) * | 2020-04-17 | 2021-10-17 | Rosso Officine S R L | MICRO-PERFORATED CHANNEL FOR AIR DISTRIBUTION WITH ANTIBACTERIAL CHARACTERISTICS |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0175892A1 (en) * | 1984-09-10 | 1986-04-02 | AMELIORAIR S.A. Société dite : | Gas, especially air distributing duct for a room |
EP0510946A2 (en) * | 1991-04-23 | 1992-10-28 | Kawasaki Steel Corporation | Air supplying apparatus |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2857108A (en) * | 1954-10-18 | 1958-10-21 | James O Wallace | Greenhouse heating system |
GB1317833A (en) * | 1968-05-02 | 1973-05-23 | Howorth & Co Ltd James | Operating theatres |
GB2135442A (en) * | 1983-02-24 | 1984-08-30 | Howorth Air Eng Ltd | Air supply duct |
US5137057A (en) * | 1989-05-26 | 1992-08-11 | Hummert Iii August H | Flexible duct and method of suspending a duct |
DK12792D0 (en) * | 1992-02-03 | 1992-02-03 | Ke Safematic As | VENTILATION |
-
1997
- 1997-07-24 EP EP97830388A patent/EP0899519B1/en not_active Expired - Lifetime
- 1997-07-24 DE DE69702056T patent/DE69702056D1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0175892A1 (en) * | 1984-09-10 | 1986-04-02 | AMELIORAIR S.A. Société dite : | Gas, especially air distributing duct for a room |
EP0510946A2 (en) * | 1991-04-23 | 1992-10-28 | Kawasaki Steel Corporation | Air supplying apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9039503B2 (en) | 2008-02-29 | 2015-05-26 | Rite-Hite Holding Corporation | Longitudinally split fabric air duct |
DE102021121007A1 (en) | 2021-08-12 | 2023-02-16 | Ford Global Technologies, Llc | Ventilation device for ventilating an interior space |
Also Published As
Publication number | Publication date |
---|---|
DE69702056D1 (en) | 2000-06-21 |
EP0899519A1 (en) | 1999-03-03 |
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