EP2784406B1 - Régulateur de débit - Google Patents

Régulateur de débit Download PDF

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Publication number
EP2784406B1
EP2784406B1 EP14156360.1A EP14156360A EP2784406B1 EP 2784406 B1 EP2784406 B1 EP 2784406B1 EP 14156360 A EP14156360 A EP 14156360A EP 2784406 B1 EP2784406 B1 EP 2784406B1
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EP
European Patent Office
Prior art keywords
flap
volume flow
regulator according
flow regulator
flow channel
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.)
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Application number
EP14156360.1A
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German (de)
English (en)
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EP2784406A1 (fr
Inventor
Arne Dahms
Thomas Harms
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Individual
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Individual
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Priority to PL14156360T priority Critical patent/PL2784406T3/pl
Publication of EP2784406A1 publication Critical patent/EP2784406A1/fr
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Publication of EP2784406B1 publication Critical patent/EP2784406B1/fr
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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
    • 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
    • F24F11/745—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 the air flow rate increasing with an increase of air-current or wind pressure
    • 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
    • F24F13/1426—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 actuating means
    • F24F2013/146—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 actuating means with springs

Definitions

  • the invention relates to a mechanically automatic volume flow regulator with a flap leaf which is pivotably arranged in a flow channel and which is held on a pivot axis running transversely to the flow direction through the flow channel and which is divided by the pivot axis into a front flap leaf part and a rear flap leaf part as seen in the flow direction front flap leaf part has a greater length in the direction perpendicular to the pivot axis than the rear flap leaf part, and with a return mechanism which exerts a torque acting in the opening direction on the flap leaf.
  • Volume flow controllers are used in ventilation and air conditioning systems to regulate the volume flow of a medium, in particular a gaseous medium, to a predetermined, preferably adjustable setpoint, or to limit it to a predetermined, preferably adjustable maximum value.
  • a volume flow limiter which is to be viewed here as a special case of a volume flow controller.
  • the resistance that the valve blade opposes to the flow of the medium depends on the angle of attack of the valve blade relative to the direction of flow.
  • the angle of incidence of the flap blade thus also determines the volume flow that is established in the flow channel at a given differential pressure.
  • the angle of attack is greater than 0 °, i.e. the valve blade is not oriented exactly parallel to the direction of flow, flow and pressure loads or forces that cause opposing torques act on the front and rear valve blade parts. If both flap parts have the same shape and the same area, the torques caused by an even pressure load would cancel each other out at an angle of attack of 90 °. However, due to the inclined position of the damper blade at smaller angles of attack, the medium is deflected to one side, so that as the cross-sectional narrowing increases, the flow against the rear flap leaf part is greater than that of the front flap leaf part.
  • the flap leaf or its pivot axis does not necessarily have to have an active actuator. Rather, mechanically automatic volume flow controllers and volume flow limiters can also be implemented in which there is no actuating or closing mechanism or an actuating mechanism, for example in the form of a return spring, at most serves to generate an opening torque that is dependent on the angle of attack of the damper blade and that is aerodynamically generated Counteracting closing torque.
  • the spring characteristic of the reset mechanism determines the equilibrium position in which the opening torque and the closing torque are balanced. With a suitable course of the characteristic, this equilibrium position is stable, so that the volume flow is regulated to a value which corresponds to this stable equilibrium position of the damper blade.
  • GB 2,378,233 shows a fire damper in which the damper blade parts lying on both sides of the pivot axis differ in their width.
  • the object of the invention is to create a volume flow controller with which the set or limit volume flow can be set and regulated more easily and more precisely, particularly in the range of small volume flow rates.
  • the front flap leaf part has a smaller width in the direction parallel to the pivot axis than the rear flap leaf part.
  • valve leaf is thus approximately T-shaped in plan view, with the front valve leaf part as a vertical web and the rear valve leaf part as a transverse bar. Even in the case in which the two flap leaf parts have the same surface area - and thus the same weight with the same flap leaf thickness - a greater closing torque is achieved here because the resulting pressure force acts on the front flap part with a larger lever arm than the resulting one Pressure force on the rear flap part.
  • the regulating or limiting behavior can therefore be adjusted in a very simple manner by suitable selection of the contour shape of the damper blade as required.
  • the different contours of the two flap leaf parts mean that the flap leaf cannot completely block the cross-section of the flow channel even at an angle of incidence of 90 °. Rather, an area that is open for a flow remains at the free end of the (shorter) rear one Damper blade part and one or two areas open for a flow to the side next to the (narrower) front damper blade part. In many applications, a complete shut-off of the flow channel is also not necessary.
  • the geometry of the flap blade according to the invention then has the advantage that the controllability or adjustability of the volume flow in the area of high volume flow throughputs is improved by the areas open to flow.
  • a blocking body in the space between the inner surface of the flow channel and the free end of the rear valve blade part causes a certain venturi effect, i.e. an increase in the flow velocity in the narrowed gap which the blocking body forms with the edge of the valve blade.
  • this effect can also be used when the two flap leaf parts differ only in length but not in width.
  • the content of this application is thus also a volume flow regulator with a flap leaf pivotably arranged in a flow channel, which is held on a pivot axis running transversely to the flow direction through the flow channel and is divided by the pivot axis into a front flap leaf part and a rear flap leaf part, as seen in the flow direction, that the front flap leaf part has a greater length in the direction perpendicular to the pivot axis than the rear flap leaf part, in which a blocking body is arranged in the flow channel so that it lies opposite the free end of the rear flap leaf part when the flap leaf is closed.
  • the areas that are open for a throughflow and that remain on one side or both sides of the front flap leaf part are preferably provided by blocking bodies in the Form of closed housing-like, preferably aerodynamically shaped structures that adjoin the wall of the flow channel or are part of this wall.
  • These structures can then be used to accommodate mechanical components of the volume flow regulator, for example an elastic return mechanism, vibration damper or the like, in a space-saving manner in the flow channel in such a way that they can act on the flap blade via the pivot axis, but are fluidically separated from the medium. This has the advantage of improved hygiene, since no impurities can adhere to the mechanical components which are encapsulated in relation to the medium.
  • the blocking bodies are preferably extended in the longitudinal direction of the flow channel in such a way that they are not only effective when the flap leaf is in the closed position, but their effect already begins gradually when the flap leaf approaches the closed position.
  • the in Figs. 1 and 2 The volume flow regulator shown is designed in a tubular housing 10 which forms a flow channel 12 with a generally circular cross-section, but which is narrowed at the location of a flap leaf 14 by blocking bodies 16, 18, 20.
  • the locking bodies 16, 18, 20 are formed in this example by indentations in the peripheral wall of the tubular housing 10.
  • the damper blade is in Fig. 1 shown in a completely closed position (opening angle of almost 90 °), in which it practically completely fills the inner cross-section of the flow channel 12 left free by the blocking bodies 16, 18, 20.
  • the valve leaf is shown in FIG Fig.1 shown with a fill pattern.
  • the flap leaf sits rigidly on a pivot axis 22 that runs centrally through the housing 10 and is rotatably mounted in the circumferential wall of the flow channel 12, more precisely in two parallel wall sections that extend at right angles to the pivot axis and are part of the blocking bodies 18 and 20.
  • the direction of view in Fig. 1 corresponds to the direction in which the flow channel 12 is flowed through by a medium (air).
  • a medium air
  • the pivot axis 22 divides the flap leaf 14 into a front flap leaf part 14a, seen in the flow direction, which essentially corresponds to the vertical web of the T-shaped outline, and a rear flap leaf part 14b, which forms the transverse bar of the "T".
  • the two flap leaf parts 14a and 14b have the same area. This has the advantage that the valve blade can be statically balanced more easily by the Thicknesses of both parts can be selected accordingly, so that the leverage of the weight forces of both valve leaf halves is compensated. This enables installation in any position. Alternatively, this can also be achieved by statically balancing the damper blade with the aid of counterweights.
  • the rear flap leaf part 14b has a greater maximum width in the direction parallel to the pivot axis 22 than the front flap leaf part 14a.
  • the front flap leaf part 14a has a greater maximum length in the direction perpendicular to the pivot axis 22 than the rear flap leaf part 14b. The latter has the consequence that, despite the same surface area, the center point P1 of the front flap leaf part 14a is further away from the pivot axis 22 than the center point P2 of the rear flap leaf part 14b.
  • the opening position of the valve leaf is limited by stops in such a way that the valve leaf is also positioned slightly obliquely to the flow direction in the maximum open position, so that the above-mentioned torque imbalance is also effective in the open position.
  • the volume flow controller responds very sensitively even at low volume flow and low pressure losses and thus the volume flow can be better regulated.
  • the return mechanism can be of any known construction and can be formed, for example, by a leaf spring connected to the pivot axis 22, which rests against an adjustable stop and is more or less bent when the valve leaf is pivoted.
  • An example of such a reset mechanism is shown in EP 1 134 507 B1 described.
  • the angle of attack of the valve blade in this equilibrium position determines the volume flow through the flow channel 12. If the volume flow increases due to a disturbance, the aerodynamically induced torque increases and the valve blade continues to pivot in the closing direction until a new equilibrium is reached at a larger angle of attack, see above that the volume flow is throttled accordingly. Conversely, as the volume flow decreases, the aerodynamically induced torque decreases, so that the restoring torque of the restoring mechanism 24 predominates and a new equilibrium position is reached when the valve blade is opened further.
  • the volume flow is mechanically and automatically regulated to a target value, which can be adjusted by adjusting the Stop for the leaf spring in the reset mechanism 24 can be selected within a wide range.
  • the sensitive response of the valve blade according to the invention allows setting and precise maintenance of a very small volume flow.
  • a damping element 26 is accommodated in the example shown, which can have a known design and is therefore also only shown schematically.
  • it can be a pneumatic damper in the form of a bellows, the volume of which can only change gradually in accordance with the rotation of the pivot axis 22.
  • the front flap leaf part can also be designed asymmetrically, so that a free space remains on only one side, which is filled by a single blocking body.
  • This locking body can then accommodate both the reset mechanism 24 and the damping element 26.
  • Fig. 2 shows a longitudinal section of the tubular housing 10, which has receptacles 28 at both ends for lip seals for insertion into ventilation ducts, not shown.
  • the flap leaf 14 is shown here in a not fully closed position.
  • a stop 30 is formed on the blocking body 16, against which the free end of the rear flap leaf part 14b strikes when the maximum closed position is reached.
  • the locking bodies 16 and 18 each extend over a greater length of the flow channel 12 and are rounded at the ends so that the medium can flow around them with little resistance.
  • the length of the blocking bodies 16, 18, 20 in the axial direction of the flow channel 12 is greater than half the diameter of the flow channel cross section.
  • Fig. 3 shows the valve leaf 14 in a more open position.
  • Flow lines illustrate here how the flow of the medium is deflected through the valve leaf so that it flows at a higher speed through a gap between the free end of the rear valve leaf part 14b and the blocking body 16.
  • the rear flap leaf part 14b is therefore approached with an increased flow velocity, so that the pressure here is lower than on the front side of the front flap leaf part 14a.
  • This pressure imbalance intensifies the torque-increasing effect which is achieved by the unequal shape of the flap leaf parts 14a and 14b.
  • the top of the blocking bodies 18 and 20 is approximately level with the pivot axis 22. Behind this pivot axis in the direction of flow, the upper side of the blocking bodies rises slightly. Since the rear flap leaf part 14b is widthwise (perpendicular to the plane of the drawing in Fig. 3 ) overlaps with the blocking bodies 18, 20, the rising upper sides of the blocking bodies here form a stop 32 which thus defines the open position of the flap leaf.
  • the exemplary embodiment described here can be modified in many ways. For example, it is not imperative that the flap leaf 14 is flat and has a uniform thickness. It can optionally also be profiled or curved like a wing.
  • Fig. 4 is a schematic representation of a volume flow regulator, in which in one of the lateral blocking bodies, in this example in the blocking body 18, a pneumatic Damper 34 is housed (as a specification of the damping element 26 according to Fig.1 ).
  • This damper 34 has two flexible, in the view according to Fig. 4 approximately circular sector-shaped bellows 36, 38, which are arranged on both sides of a displacement arm 40 extending radially from the pivot axis 22.
  • the bellows 36, 38 and the displacement arm 40 are roughly fitted into a sector-shaped chamber which is delimited in the interior of the blocking body 18 by a partition 42 (which is not hermetically sealed and thus allows pressure equalization).
  • an inlet opening 44 is formed into the interior of the tubular housing 10, which opens against the direction of flow of the medium.
  • This inlet opening 44 communicates via a throttle opening 46 with the bellows 36 and via a connecting hose 48 laid inside the blocking body 18 and a further throttle opening 50 with the bellows 38 , 38 connected to each other.
  • the space inside the blocking body 18 outside the bellows 36, 38 is connected to the interior of the housing 10 on the outflow side of the flap 14 via ventilation openings 45.
  • the pressure equalization is effected in that the medium from the compressed bellows via the throttle openings 46, 50 and the connecting hose 48 into the expanded bellows or through the inlet opening 44 back into the interior of the tubular Housing flows.
  • the flow resistance of the two throttle openings 46, 50 has a damping effect, so that any vibrations of the flap 14 are effectively damped.
  • the space inside the blocking body can be covered further to the outside, that is to say to the ventilation pipe, by a cover (not shown) and the two bellows can thus be protected.
  • the embodiment is particularly advantageous in which the complete damper is accommodated in a space-saving manner and protected against contamination in a blocking body which narrows the cross section of the flow channel in the area of the flap leaf.
  • the ventilation openings 45 which are located behind the valve leaf in the direction of flow, ensure that the pressure in the locking body is always slightly lower than in front of the valve leaf and thus in the damping bellows; this means that they always fill up safely and their dampening effect is guaranteed.
  • damper 34 is accommodated in the blocking body 18 and thus lies completely within the (here circular) cross section of the flow channel 12, it is possible to also the in Fig. 4 After the damper and the reset mechanism have been suitably set, slide the volume flow controller shown into a ventilation pipe when installing the ventilation system so that it is no longer accessible after installation.
  • the same component can also be used to implement a manually or possibly even motor-adjustable volume flow controller, which can be inserted as an intermediate piece between two sections of a ventilation pipe and whose setting or control mechanism is therefore accessible at all times.
  • FIG. 5 An example is in Fig. 5 shown.
  • the volume flow controller off Fig. 4 the housing 10 of which can consist of plastic, for example (in Fig. 5 only shown in dashed lines) is received here in a tubular sleeve 52 made of sheet steel, which has connecting nipples 54 at both ends and can thus be inserted as an intermediate piece into a pipeline, for example a ventilation line.
  • the tubular sleeve 52 in turn consists of two parts 56, 58. Before these two parts 56, 58 are joined together, the housing 10 can be pushed into the part 58. This part 58 is then inserted into an enlarged end 60 of the other part 56.
  • the plug connection can be designed as a crimped connection or permanently fixed in some other way, for example by gluing, soldering or the like.
  • the housing 10 has elastic sealing lips 62 on the circumference, which are already used in connection with Fig. 2 mentioned receptacles 28 are held and the housing 10 frictionally hold in the part 58 of the tubular sleeve 52 in position.
  • This part 58 of the tubular sleeve has at least one inspection flap 64 in its circumferential wall at the point where the locking body 18 and / or 20 accommodating the reset, regulating or damping mechanism is located, via which access to the relevant mechanism can be obtained .

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  • 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)
  • Air-Flow Control Members (AREA)
  • Lift Valve (AREA)

Claims (13)

  1. Régulateur de débit volumétrique mécaniquement indépendant ayant une lame de clapet (14) agencée de manière à pouvoir pivoter dans un canal d'écoulement (12), laquelle lame de clapet est maintenue sur un axe de pivotement (22) s'étendant transversalement à la direction d'écoulement à travers le canal d'écoulement et est divisée par l'axe de pivotement en une partie de lame de clapet avant (14a) et une partie de lame de clapet arrière (14b) lorsqu'elles sont vues dans la direction d'écoulement, de sorte que dans la direction perpendiculaire à l'axe de pivotement (22), la partie de lame de clapet avant a une longueur plus grande que la partie de lame de clapet arrière, dans lequel dans la direction parallèle à l'axe de pivotement (22), la partie de lame de clapet avant (14a) a une largeur plus petite que la partie de lame de clapet arrière (14b)
    caractérisé en ce qu'un mécanisme de rappel (24) est prévu qui exerce sur la lame de clapet un couple agissant dans une direction d'ouverture.
  2. Régulateur de débit volumétrique selon la revendication 1, dans lequel la partie de lame de clapet avant (14a) et la partie de lame de clapet arrière (14b) ont des aires de surface égales.
  3. Régulateur de débit volumétrique selon l'une des revendications précédentes, dans lequel le canal d'écoulement (12) a une section transversale circulaire ou rectangulaire, cette section transversale étant toutefois rétrécie par au moins un corps de blocage (16, 18, 20) à l'emplacement de la lame de clapet (14).
  4. Régulateur de débit volumétrique selon la revendication 3, dans lequel un corps de blocage (16) est agencé de sorte qu'il fait face à l'extrémité libre de la partie de lame de clapet arrière (14b) lorsque la lame de clapet (14) est fermée.
  5. Régulateur de débit volumétrique selon la revendication 3 ou 4, dans lequel au moins un corps de blocage (18, 20) est agencé latéralement à la partie de lame de clapet avant (14a).
  6. Régulateur de débit volumétrique selon l'une des revendications 3 à 5, dans lequel le ou les corps de blocage (16, 18, 20) sont formés de sorte que lorsque la lame de clapet (14) se trouve dans la position fermée maximale, ils bloquent le canal d'écoulement (12) conjointement avec cette lame de clapet.
  7. Régulateur de débit volumétrique selon l'une des revendications 3 à 6, dans lequel au moins un des corps de blocage (16, 18, 20) s'étend dans une direction axiale du canal d'écoulement (12) sur une longueur qui est au moins égale à la moitié du diamètre du canal d'écoulement.
  8. Régulateur de débit volumétrique selon l'une des revendications 3 à 7, dans lequel au moins un des corps de blocage (16, 18) est arrondi aux extrémités de manière aérodynamique.
  9. Régulateur de débit volumétrique selon l'une des revendications 3 à 8, dans lequel au moins un des corps de blocage (16, 18, 20) est formé par un renfoncement dans la paroi périphérique du canal d'écoulement (12) .
  10. Régulateur de débit volumétrique selon l'une des revendications 3 à 9, dans lequel l'axe de pivotement (22) est monté dans une paroi d'au moins un des corps de blocage (20) et un mécanisme de réglage (24) est placé dans ce corps de blocage (20) séparément du canal d'écoulement (12).
  11. Régulateur de débit volumétrique selon l'une des revendications 3 à 10, dans lequel l'axe de pivotement (22) est monté dans une paroi d'au moins un des corps de blocage (18) et un élément d'amortissement (26) destiné à amortir des oscillations de la lame de clapet (14) est placé dans ce corps de blocage (18) séparément du canal d'écoulement (12).
  12. Régulateur de débit selon l'une des revendications précédentes, ayant un amortisseur pneumatique (34) pour amortir des oscillations de la lame de clapet (14), dans lequel l'amortisseur (34) comporte deux soufflets (36, 38) qui sont agencés de part et d'autre d'un bras de déplacement (40) partant radialement de l'axe de pivotement (22), et qui communiquent l'un avec l'autre par l'intermédiaire d'orifices d'étranglement (46, 50).
  13. Régulateur de débit volumétrique selon la revendication 12, dans lequel les orifices d'étranglement (46, 50) communiquent en outre avec un orifice d'entrée (44) du côté de l'entrée d'écoulement de la lame de clapet (14).
EP14156360.1A 2013-03-01 2014-02-24 Régulateur de débit Active EP2784406B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14156360T PL2784406T3 (pl) 2013-03-01 2014-02-24 Regulator objętości strumienia

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202013100885.0U DE202013100885U1 (de) 2013-03-01 2013-03-01 Volumenstromregler

Publications (2)

Publication Number Publication Date
EP2784406A1 EP2784406A1 (fr) 2014-10-01
EP2784406B1 true EP2784406B1 (fr) 2020-09-30

Family

ID=50156627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14156360.1A Active EP2784406B1 (fr) 2013-03-01 2014-02-24 Régulateur de débit

Country Status (4)

Country Link
EP (1) EP2784406B1 (fr)
DE (1) DE202013100885U1 (fr)
ES (1) ES2836250T3 (fr)
PL (1) PL2784406T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11073300B2 (en) 2016-09-13 2021-07-27 Beth-El Zikhron Yaaqov Industries Ltd. Blast valve utilizing an aerodynamically configured blade

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014103345U1 (de) * 2014-07-21 2015-10-27 Werner Wildeboer Volumenstromregler
DE202015101093U1 (de) 2015-03-06 2016-06-07 Werner Wildeboer Volumenstromregleranordnung
DE202015101092U1 (de) 2015-03-06 2016-06-07 Werner Wildeboer Volumenstromregleranordnung
DE202015101096U1 (de) 2015-03-06 2016-06-09 Werner Wildeboer Volumenstromregler mit Montagebausatz
US10695598B2 (en) * 2017-08-28 2020-06-30 Justrite Manufacturing Company, Llc Vented safety cabinet with thermally-actuated damper

Citations (2)

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Publication number Priority date Publication date Assignee Title
DE10031991A1 (de) * 2000-06-30 2002-01-17 Valeo Klimasysteme Gmbh Luftklappe
GB2378233A (en) * 2001-07-31 2003-02-05 Tri Air Innovations Ltd A blade for an air flow duct

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Publication number Priority date Publication date Assignee Title
DE607229C (de) * 1931-11-13 1934-12-19 Robert Bosch Akt Ges Selbsttaetige Drosselklappe fuer Ansaugeleitungen von Brennkraftmaschinen
FR1313310A (fr) 1961-11-17 1962-12-28 Nouveaux Ateliers Lebrun Sa Installation de climatisation
DE2430821A1 (de) * 1974-06-27 1976-01-08 Maschf Augsburg Nuernberg Ag Selbsttaetig druckabhaengig arbeitende drosselklappe
US4246918A (en) * 1979-02-09 1981-01-27 Tempmaster Corporation Method and apparatus for forced air balancing of damper blades
US4301833A (en) 1979-10-05 1981-11-24 Donald Iii Robert A Flow responsive safety valve
US6082704A (en) * 1999-05-24 2000-07-04 Nutech Energy Systems Inc. Connection collar having an adjustable damper
DE10014901C2 (de) 2000-03-17 2002-02-28 Werner Wildeboer Volumenstromregler

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10031991A1 (de) * 2000-06-30 2002-01-17 Valeo Klimasysteme Gmbh Luftklappe
GB2378233A (en) * 2001-07-31 2003-02-05 Tri Air Innovations Ltd A blade for an air flow duct

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11073300B2 (en) 2016-09-13 2021-07-27 Beth-El Zikhron Yaaqov Industries Ltd. Blast valve utilizing an aerodynamically configured blade

Also Published As

Publication number Publication date
DE202013100885U1 (de) 2014-06-04
PL2784406T3 (pl) 2021-03-08
EP2784406A1 (fr) 2014-10-01
ES2836250T3 (es) 2021-06-24

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