EP0690272A2 - Gas- oder Luftdurchflussregler - Google Patents

Gas- oder Luftdurchflussregler Download PDF

Info

Publication number
EP0690272A2
EP0690272A2 EP95303677A EP95303677A EP0690272A2 EP 0690272 A2 EP0690272 A2 EP 0690272A2 EP 95303677 A EP95303677 A EP 95303677A EP 95303677 A EP95303677 A EP 95303677A EP 0690272 A2 EP0690272 A2 EP 0690272A2
Authority
EP
European Patent Office
Prior art keywords
flap
flow
aperture
projections
flow path
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
EP95303677A
Other languages
English (en)
French (fr)
Other versions
EP0690272A3 (de
EP0690272B1 (de
Inventor
Pascal Tournier
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.)
Laird Holdings Ltd
Original Assignee
Draftex Industries Ltd
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 Draftex Industries Ltd filed Critical Draftex Industries Ltd
Publication of EP0690272A2 publication Critical patent/EP0690272A2/de
Publication of EP0690272A3 publication Critical patent/EP0690272A3/de
Application granted granted Critical
Publication of EP0690272B1 publication Critical patent/EP0690272B1/de
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
    • F24F13/08—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
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • 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
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1406—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by sealing means
    • 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
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the invention relates to gas or air flow regulators.
  • the invention relates to a regulating flap for variably obstructing an aperture to control the flow of gas or air therethrough.
  • the invention relates to a regulating flap for variably obstructing an aperture to control the flow of gas or air along a flow path therethrough, comprising a surface formation positioned between the flap and the edge of the aperture and in the flow path, the surface formation operating to reduce noise caused by such flow.
  • the invention in a third aspect, relates to apparatus for regulating the flow of gas or air under pressure along a flow path extending between first and second regions, comprising wall means separating the two regions, an aperture defined in the wall means and connecting the regions and through which the flow path passes, a regulating flap movable between a closed position in which it closes the aperture to prevent the gas or air flow therethrough and a plurality of open positions in which the aperture is opened to respectively different extents to permit the flow along the flow path, and a surface formation positioned in the flow path, the surface formation operating to reduce noise caused by such flow.
  • flaps and apparatus are known, for example, from US-A-4 249 571.
  • the edge of a flap valve carries a substrate supporting a large number of closely adjacent fibres forming a short nap pile. These are said to prevent reflection of air waves, thereby serving to reduce noise.
  • the invention aims to improve noise reduction.
  • the known regulating flap is characterised by one or more predetermined irregularly formed surfaces adjacent to which the gas or air flows when the aperture is nearly completely obstructed by the flap, whereby to reduce noise caused by such flow.
  • the known regulating flap is characterised in that the surface formation comprises means defining one or more projections which are so positioned in the flow path as to provide respective modifications of the local flow rate whereby to cause a corresponding local change in the frequency of the noise produced.
  • the known apparatus is characterised in that the surface formation comprises means defining one or more projections which are so positioned in the flow path as to provide respective modifications of the local flow rate whereby to cause a corresponding local change in the frequency of the noise produced.
  • Embodiments of the invention to be described in more detail below are for regulating air flow in the ventilating, heating or air-conditioning system of a motor vehicle.
  • an air flow regulator includes a wall 10 separating a region of higher air pressure A from a region of lower air pressure B.
  • the wall has an aperture 12 connecting the two regions A,B, and through which air can flow under control of a regulating flap 14.
  • the regulating flap 14 is pivotably mounted on the wall 10 so as to be rotatable about an axle 16 which lies centrally within the flap 14 and centrally within the aperture 12. The angular position of the flap thus determines the extent to which the aperture 12 is open.
  • the regulating flap 14 is rectangular having first and second planar side surfaces 18,20 interconnected by first and second longer edges 22,24 and two shorter edges which are not shown and are perpendicular to the edges 22,24.
  • the aperture 12 is also rectangular and is bordered by first and second longer, planar edges 26,28 and two shorter planar edges which are not shown and are perpendicular to the edges 26,28 and pivotably support the ends of the axle 16.
  • edge regions of its surfaces 18 and 20 seal against seating surfaces 30 and 34 provided on the sides 32 and 36 of the wall 10 and respectively facing regions A and B.
  • the shorter edges of the flap 14, perpendicular to the edges 22 and 24, may be provided with flexible seals or are otherwise arranged so as to seal against the corresponding edges of the aperture when the flap 14 is in the closed position.
  • Air flow through the aperture 12 from the region of higher air pressure A to the region of lower air pressure B is regulated by rotating the regulating flap 14, thereby obstructing the aperture 12 to a greater or lesser extent.
  • the aperture 12 is closed by rotating the regulating flap 14 clockwise from the intermediate position shown in Figure 1 bringing edge regions of the first and second side surfaces 18,20 of the regulating flap 14 into sealing contact with the first and second seating surfaces 30,34 respectively.
  • the regulating flap 14 is rotated anticlockwise from the position shown in Figure 1 until the regulating flap 14 lies normal to the wall 10.
  • Intermediate extents of air flow are obtained by positioning the regulating flap 14 in respective positions intermediate the closed and fully open position.
  • edges 22,24 of the flap 14 are formed with irregular convex and concave curves, as shown in Figure 2, so as to provide a series of outwardly extending projections 38 at the periphery of the regulating plate 14.
  • This arrangement is found to reduce the production of the noise when air flows through the regulator in the intermediate position described above. Noise reduction is found to be optimised when the dimensions W1, W2, W3 are all different and likewise when the dimensions 11, 12, 13 are all different.
  • the noise which the air flow tends to produce is particularly annoying when it is concentrated in a restricted frequency range.
  • the irregular projections 38 provide a number of different flow rates, each corresponding to a particular frequency, and modify the turbulence. In this way, the irregular projections can be designed to spread the frequencies of the noise caused by the total air flow over a larger frequency range so that the noise becomes indistinguishable from the general background or "white" noise. Because the total flow is spread over a much larger frequency range, the magnitude at each frequency within the range is greatly reduced. In the absence of the surface irregularities, the air flow would be in the form of a single flow, thus producing a noise having a single frequency or restricted range of frequencies and thus particularly annoying.
  • each projection or irregularity 38 extends outwardly from the flap 14 varies with the thickness of the flap.
  • the flap is provided with small holes 40 which have various cross-sections as shown.
  • the irregularities 38, as shown in the Figure, and the holes 40 may be used in conjunction with each other as shown or separately. They have the same minimising effect on the noise as explained above in relation to Figure 2.
  • the holes 40 are positioned closer to the edge of the flap 14 than the region 41 indicated in Figure 3 which is the region where the surface of the flap 14 contacts the edge of the aperture 12 when closing it.
  • the irregularly formed edges are formed in flexible sealing edge regions extending around the periphery of the regulating flap 14 as shown in Figure 4.
  • the flap 14 comprises a rigid central portion or panel 42 and a surrounding flexible, resilient relatively soft lip 44 in whose edges are formed the irregular projections 38.
  • the provision of the irregular projections in the softer material is found to provide greater noise reduction. Because of the flexibility of the lip 44, and its slight deformation under pressure, the gap through which the air flows is slightly increased. The air speed is therefore slightly reduced, thus providing reduction of acoustic pressure and further noise reduction.
  • the soft lip 44 is advantageously made of foamed or cellular material to increase these effects.
  • the soft lip 44 is also advantageous in that it provides better sealing around the aperture 12 when the flap 14 is in the closed position. In addition, during closure of the flap 14 the soft lip 44 provides less abrupt interruption of the air flow and, again, reduced noise.
  • irregular edge projections can be provided on the edges of the aperture instead of or in addition to providing them on the regulating flap 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Regulation And Control Of Combustion (AREA)
EP19950303677 1994-07-01 1995-05-30 Gas- oder Luftdurchflussregler Expired - Lifetime EP0690272B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9413284 1994-07-01
GB9413284A GB2290849B (en) 1994-07-01 1994-07-01 Gas or air flow regulators

Publications (3)

Publication Number Publication Date
EP0690272A2 true EP0690272A2 (de) 1996-01-03
EP0690272A3 EP0690272A3 (de) 1996-10-30
EP0690272B1 EP0690272B1 (de) 1999-11-17

Family

ID=10757673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950303677 Expired - Lifetime EP0690272B1 (de) 1994-07-01 1995-05-30 Gas- oder Luftdurchflussregler

Country Status (4)

Country Link
EP (1) EP0690272B1 (de)
DE (1) DE69513334T2 (de)
ES (1) ES2138148T3 (de)
GB (1) GB2290849B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717335A1 (de) * 1996-05-06 1997-11-20 Valeo Climatisation Schwenkklappe mit Dichtungslippe für Lüftungsvorrichtung
EP1580049A1 (de) * 2004-03-25 2005-09-28 Behr GmbH & Co. KG Regelklappe für ein Lüftungssystem eines Kraftfahrzeugs
EP1695848A1 (de) 2005-02-23 2006-08-30 Valeo Klimasysteme GmbH Lufteinlassgehäuse für Fahrzeugklimaanlage
DE102007016184A1 (de) * 2007-04-02 2008-10-09 Behr Gmbh & Co. Kg Klappenanordnung, insbesondere für ein Kraftfahrzeug-Belüftungssystem
US7520803B2 (en) * 2003-11-04 2009-04-21 Denso Corporation Air passage opening and closing device capable of preventing uncomfortable noise
DE10018268B4 (de) * 2000-04-13 2010-11-04 Behr Gmbh & Co. Kg Luftstromsteuerelement für eine Heizungs- oder Klimaanlage eines Kraftfahrzeuges
EP2433826A1 (de) * 2010-09-28 2012-03-28 Behr GmbH & Co. KG Strömungskanalanordnung
EP2508815A1 (de) * 2011-04-08 2012-10-10 TROX GmbH Einrichtung zur Beeinflussung einer Luftströmung in einer Komponente einer klimatechnischen Anlage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007036824B4 (de) 2007-08-03 2020-06-18 Mahle International Gmbh Klappenanordnung, insbesondere für eine Fahrzeug-Klimaanlage, zur Regelung eines Luftstroms
DE102011007904A1 (de) * 2011-04-21 2012-10-25 Behr Gmbh & Co. Kg Dichtlippe für eine Lüftungsklappe einer Fahrzeugklimaanlage und Lüftungsklappe mit Dichtlippe
CN111140864B (zh) * 2019-12-27 2022-08-23 江苏京源环保股份有限公司 一种耙式烟道挡板门

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238955A (en) * 1962-01-22 1966-03-08 Lockheed Aircraft Corp Fluid valve noise suppressor
CH587455A5 (de) * 1973-05-30 1977-04-29 Darmstadt Rudolf
CH582324A5 (de) * 1975-03-20 1976-11-30 Bosch Gmbh Robert
US4249571A (en) * 1979-04-06 1981-02-10 Wehr Corporation Air control mechanism having noise suppression means
CA1188227A (en) * 1980-11-28 1985-06-04 Stephen C. Inglis Low frequency noise and turbulence reducer
FI71983C (fi) * 1985-01-09 1987-03-09 Neles Oy Ventil.
DE3537634A1 (de) * 1985-10-23 1987-04-30 Rapetti Rubinetterie Sanitaeres absperrorgan
IT1231236B (it) * 1987-09-18 1991-11-26 Mamoli Robinetteria Spa Cartuccia per rubinetto miscelatore con otturatore a piastrine ceramiche.
JPH0331645A (ja) * 1989-06-28 1991-02-12 Toshiba Corp 空気調和機
DE4142757C2 (de) * 1991-12-23 1996-03-14 Ltg Lufttechnische Gmbh Drosselvorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717335A1 (de) * 1996-05-06 1997-11-20 Valeo Climatisation Schwenkklappe mit Dichtungslippe für Lüftungsvorrichtung
DE19717335B4 (de) * 1996-05-06 2015-02-12 Valeo Climatisation Schwenkklappe mit Dichtungslippe für Lüftungsvorrichtung
DE10018268B4 (de) * 2000-04-13 2010-11-04 Behr Gmbh & Co. Kg Luftstromsteuerelement für eine Heizungs- oder Klimaanlage eines Kraftfahrzeuges
US7520803B2 (en) * 2003-11-04 2009-04-21 Denso Corporation Air passage opening and closing device capable of preventing uncomfortable noise
EP1580049A1 (de) * 2004-03-25 2005-09-28 Behr GmbH & Co. KG Regelklappe für ein Lüftungssystem eines Kraftfahrzeugs
EP1695848A1 (de) 2005-02-23 2006-08-30 Valeo Klimasysteme GmbH Lufteinlassgehäuse für Fahrzeugklimaanlage
DE102005008330B4 (de) * 2005-02-23 2015-04-02 Valeo Klimasysteme Gmbh Luftverteiler für eine Heizungs- und/oder Klimaanlage in Fahrzeugen
DE102007016184A1 (de) * 2007-04-02 2008-10-09 Behr Gmbh & Co. Kg Klappenanordnung, insbesondere für ein Kraftfahrzeug-Belüftungssystem
EP2433826A1 (de) * 2010-09-28 2012-03-28 Behr GmbH & Co. KG Strömungskanalanordnung
EP2508815A1 (de) * 2011-04-08 2012-10-10 TROX GmbH Einrichtung zur Beeinflussung einer Luftströmung in einer Komponente einer klimatechnischen Anlage

Also Published As

Publication number Publication date
DE69513334T2 (de) 2000-05-11
GB2290849B (en) 1998-05-27
EP0690272A3 (de) 1996-10-30
ES2138148T3 (es) 2000-01-01
GB2290849A (en) 1996-01-10
DE69513334D1 (de) 1999-12-23
GB9413284D0 (en) 1994-08-24
EP0690272B1 (de) 1999-11-17

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