EP2909541B1 - Slide valve for a ventilation device - Google Patents

Slide valve for a ventilation device Download PDF

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Publication number
EP2909541B1
EP2909541B1 EP13837889.8A EP13837889A EP2909541B1 EP 2909541 B1 EP2909541 B1 EP 2909541B1 EP 13837889 A EP13837889 A EP 13837889A EP 2909541 B1 EP2909541 B1 EP 2909541B1
Authority
EP
European Patent Office
Prior art keywords
slide valve
valve device
valve plate
slide
vent
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.)
Active
Application number
EP13837889.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2909541A1 (en
EP2909541A4 (en
Inventor
Tomas SÖDERBERG
Per-Åke LARSSON
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.)
Swegon Operations AB
Original Assignee
Swegon Operations 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 Swegon Operations AB filed Critical Swegon Operations AB
Publication of EP2909541A1 publication Critical patent/EP2909541A1/en
Publication of EP2909541A4 publication Critical patent/EP2909541A4/en
Application granted granted Critical
Publication of EP2909541B1 publication Critical patent/EP2909541B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/12—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of sliding members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • 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
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/16—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of parallelly-movable plates
    • 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
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct

Definitions

  • the present invention relates to a valve device and a slide valve for a ventilation installation.
  • supply air diffusors may be one or more that are connected to a main pipe, where supplied fresh air is brought into motion towards the supply air diffusors via the main pipe by means of a fan arrangement.
  • a supply air diffusor may in its least complicated form be an opening or aperture in the ventilation system.
  • the supply air diffusor may also be integrated with a cooling or heating baffle to be able to control the temperature of the supplied air.
  • the supply air diffusor may in these cases be arranged such that the fresh air that is supplied to the room brings existing air in the room such that is passes a heat exchanger in a cooling/heating baffle and is tempered.
  • a conference room may sometimes be empty, and sometimes be more or less occupied, such that different needs of air supply arise.
  • the ventilation arrangement is often supplied with a plurality of slide valves or vents in, or in close connection to, the supply air diffusors.
  • slide valves An important function of the slide valves is that they shall be able to close tight when it is not desired to have any flow in a duct. Leakage leads to unnecessary ventilation and thus energy waste. Leakage may also lead to the occurrence of undesired noise in the form of howling or whining vents. In order to be able to provide ventilation device or slide valves that close tightly is previously known and is used in such installations today. It is, however, desirable to develop a siding vent with an uncomplicated and reliable design.
  • Patent document US-3738572-A discloses a valve device according to the preamble of claim 1. There is therefore a desire for a valve device or slide valve ventilation device that fulfills the above requirements.
  • the object of the present invention is to provide a slide valve and a valve device in a ventilation installation that is easy to install in a ventilation installation and that can be adjusted by relatively uncomplicated means.
  • the present invention thus relates to a valve device for a ventilation installation according to claim 1.
  • the ventilation installation contains one or more ducts that may contain one or more valve devices.
  • the valve device comprises a vent surface that is equipped with a plurality of vent apertures for passage of air in the duct and a slide valve comprising a slide valve plate equipped with a plurality of slide valve apertures enabling control of the air permeability in the duct by varying its position in relation to the vent surface.
  • the slide valve is thus formed such that it may take a first position (I) in which the slide valve is positioned on the vent surface such that the vent apertures are covered by the slide valve such that the valve device is closed and no air flow is permitted through the valve device.
  • the slide valve may then be moved relative the vent surface and take a second position (II) at which at least some vent apertures have surfaces that overlap with some slide valve apertures such that an air flow is permitted through the valve device.
  • the apertures in the slide valve and the vent surface may be positioned such that apertures are placed straight over each other corresponding to a completely open position or placed such that the apertures only partly overlap each other corresponding to a partly open position (or partly closed position).
  • the slide valve and the valve device according to the present invention are designed such that when the slide valve is in the first closed position, is sucked fixed and closes tightly against the vent surface without any further detail that fixes the slide valve being required.
  • the slide valve is thus positioned on that side of the vent surface that normally has a higher pressure, the high pressure side, than the other side, the low pressure side, such that the pressure difference between the two sides of the slide valve ensures that the slide valve is tight along the vent surface such that no air passage through the ventilation device is permitted.
  • the slide valve plate is sufficiently soft and flexible such that it closes tight, at the same time as it is sufficiently rigid enough to be brought there and back without folding or squinting. An optimization of these properties is thus required. If it is the case that the suction force is the force that holds the slide valve in place, the slide valve shall have a relatively low weight since it usually are low pressure differences on the different sides of the vent surface.
  • the slide valve plate is thus preferably designed with respect to its weight and flexibility such that the force from a pressure difference between the high pressure side and the low pressure side is enough to keep the slide valve plate in its position when it is located on the high pressure side of the vent even though it is located on the underside of the vent, i.e. if the plate and the valve are located such that their surfaces are horizontally located and the slide valve plate is located on the surface side of the valve facing towards the ground.
  • the force of the pressure difference which influences the slide valve plate should thus be greater than the gravity influencing the slide valve plate.
  • several other parameters which influence how the slide valve plate is sucked to stick to the vent e.g. the surface structure of the vent surface and the slide valve plate and the size and quantity of holes and their location in the vent surface and the slide valve plate.
  • valve device is assumed to comprise some kind of rail or other arrangement having the function of preventing the slide valve plate from being completely detached from the vent surface when the slide valve is in its open position
  • slide valve plate shall be mechanically pressed towards the vent surface in order to ensure that the slide valve is tight which is the normal way of designing valves in different kinds of arrangements.
  • valve arrangements is there in general a need for a larger force in order to move the slide valve plate which also implies a need for an increased rigidity of the slide valve plate while the need for a low weight not is particularly relevant.
  • Such a design of a slide valve will thus imply other needs which will influence the design of the slide valve.
  • the valve device of the present invention is formed such that the suction force from a predetermined pressure difference of 100 Pascal (Pa) between high pressure side and low pressure side, exceeds the gravitational force from the slide valve when the slide valve is in the first closed position, i.e. that the slide valve would remain even if it is turned upside down.
  • Pa Pascal
  • the slide valve plate is therefore relatively thin and may have a thickness that falls below 1 mm, preferably below 0,7 mm and most preferably even below 0,5 and is expected to be between 0,15 and 0,35 mm.
  • the thickness of the slide valve plate is of course dependent of the material it is made of.
  • a suitable choice of material is plastic or similar polymer.
  • the plate could be laminated by several different types of plastic or other materials, but it is probably easiest to use the same material all along from am manufacturing point of view. There is also no risk that the layers loosen or that different material age differently and give rise to deformations as a consequence of different material properties. Letting the slide valve plate be made in a homogenous piece of material thus have some advantages if a material may fulfill the desired criteria.
  • the material shall thus be chosen such that the slide valve plate is sufficiently stiff and be able to slide easily against the vent surface enabling it to be easily pushed or in any other way change position from the first position (I) to the second position (II) and close sufficiently tightly when the slide valve plate is in the first, closed position (I).
  • the material chosen for the plate can therefore be a polyester film, for example Mylar® A that is one from DuPont that suitably can be used in thicknesses from 0,15 to 0,50 mm.
  • the material that is used suitably has a Young's modulus that exceeds 2000 MPa according to the test method ASTM D 882 since too soft materials have a tendency to fold.
  • the slide valve has such a stiffness relative the friction that arises when the slide valve is pushed, that it does not fold or bend to any essential degree, at the same time as it is not stiff to such a degree that it lack the ability to adapt to the bedding.
  • the slide valve plate with its recessed apertures, thus has to present a sufficient bending rigidity.
  • the bending rigidity thus partly depends on material and thickness, but also on the aperture configuration.
  • the surface does not stick, i.e. the properties of the slide valve material shall not be of such character that it has a too large tendency to stick at the surface. The surface property of the material thus becomes a compromise between finding a material for the slide valve that closes sufficiently tightly at the same time as it does not stick too hard to the surface.
  • the valve device is thus preferably formed such that the slide valve is pressed in place and retained against the vent surface only by means of the pressure difference between the low pressure side and the high pressure side. This leads to that no extra devices are needed for retaining the plate which makes the design of the valve device less complicated. It also leads to that the mechanism that is used to change the slide valve's position from open to close and vice versa may be made in a less complicated way when it does not have to be used to overcome other added frictional forces that press the slide valve against the vent surface.
  • the valve device may be formed such that the change of the slide valve's position from first, closed position (I) to the second, open position (II) is executed by pulling the slide valve by means of a drawing arm attached to the front part of the slide valve, i.e. the end of the slide valve that lies foremost in the direction of movement when the slide valve is opened.
  • a drawing arm attached to the front part of the slide valve, i.e. the end of the slide valve that lies foremost in the direction of movement when the slide valve is opened.
  • the slide valve plate is bent or folded when it is released from the closed position (I). Folding of he slide valve plate can also be avoided if the drawing arrangement is attached to both ends, for example by letting the drawing arm being attached to a stiffened part that either may be integrated with the slide valve plate or a separate thin rod that runs along the drawing direction of the slide valve plate from the front part to the rear part of the slide valve plate and is attached to both ends. It is also possible to let one drawing arm or two separate drawing arms being attached to the front and rear end of the slide valve plate such that the may be used to mainly pull the end that is positioned foremost in the movement of direction during movement of the grid.
  • the slide valve plate is preferably formed such that its aperture geometry corresponds to the vent apertures of the vent surface. It may of course be conceivable that there are some apertures in the vent surface that do not have any corresponding apertures in the slide valve plate when the slide valve plate is in the open position to contribute to holding the slide valve plate in place in the open position. Even if further detail and devices are necessary for pressing the slide valve plate against the vent surface, any kind of guiding rails or other guiding devices may be useful to straighten the plate.
  • the valve device may really only be arranged to function in two different positions, i.e. to control the slide valve to shift between the first, closed position (I) and the second, open position (II) at which essentially all apertures are completely open, i.e. all apertures in the slide valve plate have corresponding apertures in the vent surface while there, as described above, still may be apertures in the vent surface that abuts the slide valve plate to keep the slide valve plate in place.
  • Figure 1 shows a schematic view of a piece of ventilation installation 2 with a valve device 1 comprised in a supply air diffusor 11 at the end of a duct 3.
  • the figure thus shows a very simple ventilation installation 2 and it is possible to add more supply air diffusors 11 and ducts to the installation 2.
  • the ventilation arrangement is shown viewed from below.
  • the duct 3 is connected to a fan 12 that is used to create an air flow by sucking in fresh air 13 and distributes in the duct such that a high pressure side 9 is created in the duct that has a higher pressure than what is present in the surrounding air outside the duct, the low pressure side 10.
  • the valve device 1 comprises a vent surface 4 in the duct 3 which has been made by making a plurality of vent apertures 5 for passage of air in the duct 3 such that a supply air diffusor 11 has been created.
  • the vent surface 4 is intended to co-operate with a slide valve 6 (see Figure 2 ) which is attached to a drawing arm 14.
  • FIG 2 shows a slide valve 6 comprising a slide valve plate 7 equipped with a plurality of slide valve apertures 8 when the slide valve is in its first, closed position (I).
  • the slide valve plate 7 is formed such that it may be varied between taking first position (I) at which the slide valve 6 is position on the vent surface 4 such that the vent apertures 5 are covered by the slide valve plate 7 and no flow is permitted through the valve device 1.
  • the slide valve 6 may then be adjusted by means of the drawing arm 14 and to take a second position (II) at which at least some vent apertures 5 have surfaces that overlap with some slide valve apertures 8 such that an air flow is permitted through the valve device 1 as shown in Figure 3 and 4 .
  • the apertures in the slide valve and the vent surface may be positioned such that apertures are placed straight over each other corresponding to a completely open position or placed such that the apertures only partly overlap each other corresponding to a partly open position (or partly closed position). It is thus possible to let the slide valve 6 take different second position (II) where different amounts of air are permitted to pass the valve device 1 by adjusting how large part of the slide valve apertures 8 that overlap with the vent apertures 5 such that the flow through the supply air diffusor 11 is controlled.
  • the valve device 1 is designed such that the slide valve (6) is positioned on that side of the vent surface 4 that normally has a relatively higher pressure, the high pressure side (9), than the other side, the low pressure side 10.
  • the high pressure side 9 corresponds to the side of the vent surface 4 that faces the duct 3 and the low pressure side corresponds to the side that faces away from the duct 3 and in this case is constituted by surrounding air.
  • the slide valve plate 7 will then be exposed to a force from the pressure difference between the high pressure side 9 and the low pressure side 10 such that it is pressed or sucked against the vent surface 4.
  • the force that strives against pulling the slide valve 6 against the vent surface 4 is largest when the slide valve is closed as shown in Figure 2 , and smallest when the slide valve is completely open as shown in Figure 3 .
  • the slide valve 6 is formed such that when the slide valve 6 is positioned in the closed position, the force from the pressure difference between the high pressure side 9 and the low pressure side 10 sufficiently large to retain the slide valve 6 in the closed position and ensure that the slide valve 6 is tight along the vent surface such that no air flow is permitted.
  • vent apertures 5 and the slide valve apertures 8 may of course be modified regarding size, shape and mutual placement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Sliding Valves (AREA)
  • Air-Flow Control Members (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
EP13837889.8A 2012-09-17 2013-09-17 Slide valve for a ventilation device Active EP2909541B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1251037A SE536705C2 (sv) 2012-09-17 2012-09-17 Spjäll för ventilationsanordning
PCT/SE2013/051084 WO2014042587A1 (en) 2012-09-17 2013-09-17 Slide valve for a ventilation device

Publications (3)

Publication Number Publication Date
EP2909541A1 EP2909541A1 (en) 2015-08-26
EP2909541A4 EP2909541A4 (en) 2016-07-27
EP2909541B1 true EP2909541B1 (en) 2018-02-14

Family

ID=50278534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13837889.8A Active EP2909541B1 (en) 2012-09-17 2013-09-17 Slide valve for a ventilation device

Country Status (5)

Country Link
US (1) US20150247648A1 (sv)
EP (1) EP2909541B1 (sv)
NO (1) NO2909541T3 (sv)
SE (1) SE536705C2 (sv)
WO (1) WO2014042587A1 (sv)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10207132B2 (en) * 2013-08-15 2019-02-19 Flannery, Inc. Self-closing vent
JP7015986B2 (ja) * 2017-09-19 2022-02-04 パナソニックＩｐマネジメント株式会社 防塵フィルター
SE542661C2 (sv) * 2018-04-09 2020-06-23 Swegon Operations Ab Air terminal device for control of air flow in a ventilation system
US11187431B2 (en) 2019-04-22 2021-11-30 Air Distribution Technologies Ip, Llc Variable flow adapters for air diffusers with damper
US11752838B2 (en) 2019-04-22 2023-09-12 Air Distribution Technologies Ip, Llc Variable flow adapters for air diffusers of HVAC systems
IT201900020868A1 (it) * 2019-11-12 2021-05-12 Rosso Officine S R L Sistema di estrazione forzata dei fumi in caso di incendio

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GB191214128A (en) * 1911-06-16 1913-01-16 Robert Detzer Improved Ventilating Damper for Air-supply and Ventilation Channels and the like.
US1855294A (en) * 1930-09-19 1932-04-26 Kuehne William Building ventilator
US3186327A (en) * 1963-02-28 1965-06-01 Worthington Corp Induction unit for air conditioning systems
US3738572A (en) * 1967-05-08 1973-06-12 W Hall Air flow control system
US4407187A (en) * 1981-12-15 1983-10-04 Horney Robert W Air control device
GB8315653D0 (en) * 1983-06-07 1983-07-13 Dixon International Ltd Ventilator device
US5111739A (en) * 1989-11-13 1992-05-12 Hall James F Air flow control system
NL9100271A (nl) * 1991-02-15 1992-09-01 Zwaan Adrianus J Ventilatieschuif.
US5161573A (en) * 1991-05-06 1992-11-10 David Krupp Pressure equalizing damper
JP3663752B2 (ja) * 1995-11-10 2005-06-22 株式会社デンソー 空気通路切替装置および車両用空調装置
FI113397B (sv) * 1999-01-07 2004-04-15 Sanhem Konsultit Oy Reglerenhet för luftanordning
JP3951926B2 (ja) * 2002-03-11 2007-08-01 株式会社デンソー 空気通路開閉装置および車両用空調装置
JP4000959B2 (ja) * 2002-09-03 2007-10-31 株式会社デンソー 空気通路制御装置
JP3782790B2 (ja) * 2003-04-28 2006-06-07 ダイキン工業株式会社 コンテナ用冷凍ユニット
US6960130B2 (en) * 2003-05-12 2005-11-01 Rite-Hite Holding Corporation Fabric air duct with directional vent
DE102004033337B3 (de) * 2004-07-09 2006-03-02 Smart Micro Engineering GmbH Gesellschaft für High-Tech-Industrieplanung Klimatisierungsvorrichtung mit einer Drosselvorrichtung
US7527551B2 (en) * 2004-08-27 2009-05-05 Delphi Technologies, Inc. Sliding valve, especially for heating, ventilation and air conditioning system
JP4363283B2 (ja) * 2004-09-13 2009-11-11 株式会社デンソー 空気通路開閉装置
CA2726195A1 (en) * 2009-12-22 2011-06-22 Thermolec Ltee Air flow damper
US8808075B2 (en) * 2010-07-12 2014-08-19 Rite-Hite Holding Corporation Configurable pliable air ducts
US20120129443A1 (en) * 2010-10-06 2012-05-24 Philip Bastow Airflow and Heating Control Supply Air Terminal
SE537032C2 (sv) * 2012-09-17 2014-12-09 Swegon Ab Ventilationsanordning innefattande ett första utlopp och ettandra utlopp

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Title
None *

Also Published As

Publication number Publication date
SE1251037A1 (sv) 2014-03-18
SE536705C2 (sv) 2014-06-03
EP2909541A1 (en) 2015-08-26
US20150247648A1 (en) 2015-09-03
WO2014042587A1 (en) 2014-03-20
NO2909541T3 (sv) 2018-07-14
EP2909541A4 (en) 2016-07-27

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