EP2570742B1 - Air channel for installation in wall - Google Patents

Air channel for installation in wall Download PDF

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Publication number
EP2570742B1
EP2570742B1 EP11401592.8A EP11401592A EP2570742B1 EP 2570742 B1 EP2570742 B1 EP 2570742B1 EP 11401592 A EP11401592 A EP 11401592A EP 2570742 B1 EP2570742 B1 EP 2570742B1
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EP
European Patent Office
Prior art keywords
air duct
installation
duct
duct portion
shutter
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EP11401592.8A
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German (de)
French (fr)
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EP2570742A1 (en
Inventor
Heinrich Adamietz
Thomas Baehr
Christian Lauderlein
Sylvia Stecken
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Miele und Cie KG
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Miele und Cie KG
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Priority to EP11401592.8A priority Critical patent/EP2570742B1/en
Publication of EP2570742A1 publication Critical patent/EP2570742A1/en
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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
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • 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
    • F24F2007/001—Ventilation with exhausting air ducts
    • 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
    • F24F2007/0025—Ventilation using vent ports in a wall

Definitions

  • the invention relates to an air duct for installation in a wall with a tubular first channel portion, which opens into a widened cross-section channel portion, wherein the widened channel portion forms a stop surface for a backflow flap in the cross-sectional transition to the first channel portion, which is pivotally mounted in the extended channel portion is and under the action of the air flow generated by a blower in the open position formed pivotally and biased by weight when the fan is not energized rests against the stop surface and the first channel portion sealingly closes.
  • Such an air duct is out of the EP 1 925 888 A1 or the DE 10 2008 044 692 B3 known for use on an exhaust duct of a Dunstanzugshafaube. Both documents each disclose an air duct with the features of the preamble of claim 1.
  • the back pressure flap is held in non-operation of the hood by a locking device in the closed position.
  • the air duct is formed with a first channel section, which opens into an enlarged box-shaped channel section, wherein the backflow flap is pivotally mounted in the parting plane in the cross-sectional transition from the first channel section to the extended channel section.
  • the locking device is unlocked as a result of the pressure increase in the exhaust air duct, so that the backflow flap releases the flow path.
  • the box-shaped extended channel section is dimensioned such that the backflow flap can swing open freely in the available space and represents only the smallest possible flow obstacle for the exhaust air flow of the hood.
  • the installation of such air ducts, with box-shaped widened channel sections in a wall more expensive than the installation of tubular air ducts, since it can not be worked with a single core drilling. This is especially disadvantageous when existing exhaust air openings are to be replaced by newer wall boxes, which have a larger cross-section and are equipped with tight closing backwater valves.
  • the vent opening is formed closable with a closure.
  • the closure is moved by a motor located within the air passage closed position in an out of the air duct open position.
  • a separate actuator is required.
  • An air flow controlled movement of the shutter is not possible.
  • the closure with the thermal insulation is moved completely out of the air duct to release the vent and no undesirable flow resistance form. If the shutter is moved by means of an electric motor into the open or closed position, a separate servomotor with supply line is also required.
  • a combination of ventilation unit and actuator circuits is required. The elaborate design of the actuating mechanism for the closure is very costly.
  • the invention thus raises the problem of improving an air duct without additional adjusting devices for an opening and closing movement of a closure of the ventilation opening by an air-flow-controlled, pivotally mounted backflow flap in such a way that the installation of the air duct can take place with a single core drilling operation.
  • the achievable with the present invention consist in particular in that the installation of the air duct is facilitated by the substantially rotationally symmetrical design of the air duct, since a core drill can be used for the wall breakthrough.
  • Another advantage lies in the tube-shaped widened channel section and in the curved configuration of the backflow flap, which abuts against the abutment surface for the backflow flap in the cross-sectional transition from the first channel section to the widened channel section and seals off the air channel when the blower is not switched on. This advantage is achieved by the course of the stop surface, which is formed in the manner of a running on a penetration line of a cylindrical body sealing edge.
  • the backflow flap can swing open freely in the extended channel section, and forms by its curved shape more or less a continuation of the first channel section, so that it protrudes only slightly into the flow path of the exhaust air of an extractor hood.
  • the backflow flap pivots by the advantageous arrangement of the pivot bearing on a in installation position of the air duct relative to the vertical center line at an angle of preferably 45 ° to the center line axis even at low fan power of the hood in the open position.
  • the backflow flap is held in the closed position by a safety device, so that unwanted pivoting when the blower is not switched on, caused by the influence of wind on the building exterior wall, and the associated rattling noise are avoided.
  • FIG. 1 shows a perspective view of the air duct 1 in installation position with closed backflow flap 2.
  • the air duct 1 is suitable for installation in a building wall, not shown, for discharging the exhaust air of a cooker hood or a tumble dryer.
  • the air duct 1 is formed with a tubular first channel section 3 which opens into a channel section 4 which is widened in cross-section.
  • the extended channel section 4 forms in the cross-sectional transition 5 to the first channel section 3 a stop surface 6 (see FIG. 2 ) for the backwater valve 2, which is pivotally mounted in the extended channel section 4.
  • the backflow flap 2 is in the air flow generated by the blower of an extractor hood in the in FIG. 2 pivoted open position shown.
  • FIG. 3 shows a view of the air duct 1 and a sectional view corresponding to the section line shown in the view with backflow flap 2 in the open position.
  • the air duct 1 has at its outer wall of the building associated end portion a mounting flange 7, attached to the example as a not shown ventilation grille can be.
  • a mounting flange 7 attached to the example as a not shown ventilation grille can be.
  • At the exhaust air duct of an extractor hood associated end of the Lauftkanal 1 is formed with a connecting piece 8 for the exhaust air duct.
  • FIG. 3 shows a cylindrically shaped first channel section 3 which opens into the expanded channel section 4 in cross-section.
  • the extended channel section 4 is dimensioned such that the backflow flap 2 and the pivot bearing 9 do not or only slightly protrude into the flow path of the exhaust air of the hood.
  • the extended channel section 4 shown in this embodiment is designed to widen conically starting from the outer edge 10 of the stop surface 6.
  • the stop surface 6 for the backflow flap 2 is formed in the cross-sectional transition 5 in the manner of a running on a penetration line 11 of a cylindrical body sealing edge.
  • the backflow flap 2 has a curvature, wherein the projected into an image plane surface of the backflow flap 2 has a circular contour and the curvature corresponds to the course of the lateral surface of the cylindrical body.
  • the radius of curvature of the backwater valve 2 is defined by the radius of the cylindrical body, on the penetration line 11, the sealing edge extends.
  • the pivot bearing 9 for the backflow flap 2 is arranged in the installation position of the air duct 1 with respect to the vertical center line 12 of the air duct 1 on an axis 13 extending at an angle to the center line on the inner shell 14 of the widened channel section 4.
  • the axis 13 extends in the illustrated embodiment at an angle of 45 ° to the vertical center line 12.
  • the backwater valve 2 is the pivot bearing 9 opposite to the axis 13 associated with a safety device 15, the backflow flap 2 with the blower fan off in the closed position (see FIG. 4 ) holds.
  • the securing device 15 is formed with a magnet on the backflow flap 2 and a correspondingly arranged opposite pole in the region of the stop surface 6.
  • the extended channel section 4 is cylindrical with a relation to the first channel section 3 enlarged constant diameter.

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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)

Description

Die Erfindung betrifft einen Luftkanal für den Einbau in eine Wand mit einem rohrförmig ausgebildeten ersten Kanalabschnitt, welcher in einen im Querschnitt erweiterten Kanalabschnitt mündet, wobei der erweiterte Kanalabschnitt im Querschnittsübergang zum ersten Kanalabschnitt eine Anschlagfläche für eine Rückstauklappe bildet, die in dem erweiterten Kanalabschnitt schwenkbar gelagert ist und unter der Einwirkung des von einem Gebläse erzeugten Luftstroms in die Offenstellung schwenkbar ausgebildet und bei nicht eingeschaltetem Gebläse durch Gewichtskraft vorbelastet an der Anschlagfläche anliegt und den ersten Kanalabschnitt dichtend abschließt.The invention relates to an air duct for installation in a wall with a tubular first channel portion, which opens into a widened cross-section channel portion, wherein the widened channel portion forms a stop surface for a backflow flap in the cross-sectional transition to the first channel portion, which is pivotally mounted in the extended channel portion is and under the action of the air flow generated by a blower in the open position formed pivotally and biased by weight when the fan is not energized rests against the stop surface and the first channel portion sealingly closes.

Ein derartiger Luftkanal ist aus der EP 1 925 888 A1 oder der DE 10 2008 044 692 B3 für den Einsatz an einer Abluftführung einer Dunstanzugshaube bekannt. Beide Dokumente offenbaren jeweils einen Luftkanal mit den Merkmalen des Oberbegriffs von Anspruch 1. Die Rückstauklappe wird bei Nichtbetrieb der Dunstabzugshaube durch eine Verriegelungseinrichtung in der Schließstellung gehalten. Der Luftkanal ist mit einem ersten Kanalabschnitt ausgebildet, der in einen erweiterten kastenförmig ausgebildeten Kanalabschnitt mündet, wobei die Rückstauklappe in der Trennebene im Querschnittsübergang vom ersten Kanalabschnitt zum erweiterten Kanalabschnitt schwenkbar gelagert ist. Im Betrieb der Dunstabzugshaube wird die Verriegelungseinrichtung infolge des Druckanstiegs im Abluftkanal entriegelt, so dass die Rückstauklappe den Strömungsweg frei gibt. Der kastenförmige erweiterte Kanalabschnitt ist derart dimensioniert, dass die Rückstauklappe in dem zur Verfügung stehenden Raum frei aufschwenken kann und nur ein möglichst geringes Strömungshindernis für den Abluftstrom der Dunstabzugshaube darstellt. Allerdings ist der Einbau derartiger Luftkanäle, mit kastenförmig erweiterten Kanalabschnitten in eine Wand aufwendiger als der Einbau von rohrförmigen Luftkanälen, da hier nicht mit einem einzigen Kernbohrvorgang gearbeitet werden kann. Dies ist insbesondere dann besonders nachteilig, wenn bestehende Abluftöffnungen durch neuere Mauerkästen ersetzt werden sollen, die einen größeren Querschnitt aufweisen und mit dichtschließenden Rückstauklappen ausgerüstet sind.Such an air duct is out of the EP 1 925 888 A1 or the DE 10 2008 044 692 B3 known for use on an exhaust duct of a Dunstanzugshafaube. Both documents each disclose an air duct with the features of the preamble of claim 1. The back pressure flap is held in non-operation of the hood by a locking device in the closed position. The air duct is formed with a first channel section, which opens into an enlarged box-shaped channel section, wherein the backflow flap is pivotally mounted in the parting plane in the cross-sectional transition from the first channel section to the extended channel section. During operation of the extractor hood, the locking device is unlocked as a result of the pressure increase in the exhaust air duct, so that the backflow flap releases the flow path. The box-shaped extended channel section is dimensioned such that the backflow flap can swing open freely in the available space and represents only the smallest possible flow obstacle for the exhaust air flow of the hood. However, the installation of such air ducts, with box-shaped widened channel sections in a wall more expensive than the installation of tubular air ducts, since it can not be worked with a single core drilling. This is especially disadvantageous when existing exhaust air openings are to be replaced by newer wall boxes, which have a larger cross-section and are equipped with tight closing backwater valves.

Um diesen Nachteil zu vermeiden ist aus der DE 20 2005 010 912 U1 ein Luftkanal für den Einsatz in einer Wand mit einem einzigen Strömungskanal bekannt, dessen Lüftungsöffnung mit einem Verschluss verschließbar ausgebildet ist. Der Verschluss wird motorisch von einer innerhalb des Luftkanals liegenden Schließstellung in eine außerhalb des Luftkanals liegende Offenstellung bewegt. Hierzu ist ein separater Stellantrieb erforderlich. Eine luftstromgesteuerte Bewegung des Verschlusses ist nicht möglich. Bei dieser Ausbildung wird der Verschluss mit der thermischen Isolierung komplett aus dem Luftkanal heraus bewegt, um die Lüftungsöffnung frei zu geben und keinen unerwünschten Strömungswiderstand zu bilden. Wird der Verschluss elektromotorisch in die Offen- oder Schließstellung bewegt, ist außerdem ein separater Stellmotor mit Zuleitung erforderlich. Um zu gewährleisten, dass das an den Luftkanal angeschlossene Lüftungsgerät nur bei geöffnetem Verschluss betrieben werden kann, ist eine Kombination der Schaltungen von Lüftungsgerät und Stellmotor erforderlich. Die aufwändig gestaltete Konstruktion der Stellmechanik für den Verschluss ist sehr kostenintensiv.To avoid this disadvantage is from the DE 20 2005 010 912 U1 an air duct for use in a wall with a single flow channel known, the vent opening is formed closable with a closure. The closure is moved by a motor located within the air passage closed position in an out of the air duct open position. For this purpose, a separate actuator is required. An air flow controlled movement of the shutter is not possible. In this embodiment, the closure with the thermal insulation is moved completely out of the air duct to release the vent and no undesirable flow resistance form. If the shutter is moved by means of an electric motor into the open or closed position, a separate servomotor with supply line is also required. To ensure that the ventilation unit connected to the air duct can only be operated when the shutter is open, a combination of ventilation unit and actuator circuits is required. The elaborate design of the actuating mechanism for the closure is very costly.

Aus der EP 1 921 394 A1 und der DE 10 2006 053 208 A1 sind ähnliche Ausführungen bekannt, bei denen der Verschlussdeckel des Luftkanals aus dem Luftkanal herausfahrbar ausgebildet ist. Dabei öffnet und schließt der Verschlussdeckel selbsttätig gegen eine Rückstellkraft unter dem Einfluss der Druckdifferenz zwischen äußerer Umgebungsluft und dem Inneren des Luftkanals. Auch hier können die außerhalb des Gebäudes liegenden Bauteile einfrieren oder verschmutzen. Weiter sind die in den Luftkanal bzw. in die Strömung der Abluft hineinragenden aufwändigen Konstruktionselemente der Schließ- und Öffnungsmechanik störungsanfällig.From the EP 1 921 394 A1 and the DE 10 2006 053 208 A1 Similar embodiments are known in which the closure lid of the air duct is formed out of the air duct. In this case, the closure lid opens and closes automatically against a restoring force under the influence of the pressure difference between the outside ambient air and the interior of the air duct. Again, the components lying outside the building can freeze or pollute. Next projecting into the air duct or in the flow of exhaust air consuming design elements of the closing and opening mechanism are prone to failure.

Der Erfindung stellt sich somit das Problem, einen Luftkanal ohne zusätzliche Stelleinrichtungen für eine Öffnungs- und Schließbewegung eines Verschlusses der Lüftungsöffnung durch eine luftstromgesteuerte schwenkbar gelagerte Rückstauklappe, dahingehend zu verbessern, dass der Einbau des Luftkanals mit einem einzigen Kernbohrvorgang erfolgen kann.The invention thus raises the problem of improving an air duct without additional adjusting devices for an opening and closing movement of a closure of the ventilation opening by an air-flow-controlled, pivotally mounted backflow flap in such a way that the installation of the air duct can take place with a single core drilling operation.

Erfindungsgemäß wird dieses Problem durch einen Luftkanal mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention this problem is solved by an air duct with the features of claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

Die mit der Erfindung erreichbaren Vorteile bestehen insbesondere darin, dass der Einbau des Luftkanals durch die im wesentlichen rotationssymmetrische Ausbildung des Luftkanals erleichtert wird, da für den Mauerdurchbruch ein Kernbohrgerät verwendet werden kann. Ein weiterer Vorteil liegt in dem rohrförmig ausgebildeten erweiterten Kanalabschnitt sowie in der gekrümmten Ausbildung der Rückstauklappe, die an der Anschlagfläche für die Rückstauklappe im Querschnittsübergang vom ersten Kanalabschnitt zum erweiterten Kanalabschnitt zur Anlage kommt und den Luftkanal bei nicht eingeschaltetem Gebläse dichtend abschließt. Dieser Vorteil wird durch den Verlauf der Anschlagfläche erreicht, die in der Art einer auf einer Durchdringungslinie eines zylindrischen Körpers verlaufenden Dichtkante ausgebildet ist. Die Rückstauklappe kann in dem erweiterten Kanalabschnitt frei aufschwenken, und bildet durch ihre gekrümmte Form quasi eine Weiterführung des ersten Kanalabschnitts, so dass sie nur unwesentlich in den Strömungsweg der Abluft einer Dunstabzugshaube hineinragt. Die Rückstauklappe schwenkt durch die vorteilhafte Anordnung des Schwenklagers auf einer in Einbaulage des Luftkanals bezogen auf die vertikale Mittellinie unter einem Winkel von vorzugsweis 45° zur Mittellinie verlaufenden Achse auch bei geringer Gebläseleistung der Dunstabzugshaube in die Offenstellung. Bei ausgeschaltetem Gebläse wird die Rückstauklappe durch eine Sicherungseinrichtung in der Schließstellung gehalten, so dass ein unerwünschtes Aufschwenken bei nicht eingeschaltetem Gebläse, verursacht durch Windeinfluss an der Gebäudeaußenwand, und die damit verbundenen Klappergeräusche vermieden werden.The achievable with the present invention consist in particular in that the installation of the air duct is facilitated by the substantially rotationally symmetrical design of the air duct, since a core drill can be used for the wall breakthrough. Another advantage lies in the tube-shaped widened channel section and in the curved configuration of the backflow flap, which abuts against the abutment surface for the backflow flap in the cross-sectional transition from the first channel section to the widened channel section and seals off the air channel when the blower is not switched on. This advantage is achieved by the course of the stop surface, which is formed in the manner of a running on a penetration line of a cylindrical body sealing edge. The backflow flap can swing open freely in the extended channel section, and forms by its curved shape more or less a continuation of the first channel section, so that it protrudes only slightly into the flow path of the exhaust air of an extractor hood. The backflow flap pivots by the advantageous arrangement of the pivot bearing on a in installation position of the air duct relative to the vertical center line at an angle of preferably 45 ° to the center line axis even at low fan power of the hood in the open position. When the blower is switched off, the backflow flap is held in the closed position by a safety device, so that unwanted pivoting when the blower is not switched on, caused by the influence of wind on the building exterior wall, and the associated rattling noise are avoided.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt

Figur 1
Eine perspektivische Darstellung des Luftkanals (1) in Einbaulage mit geschlossener Rückstauklappe (2),
Figur 2
eine perspektivische Darstellung des Luftkanals (1) in Einbaulage mit geöffneter Rückstauklappe (2),
Figur 3
zeigt eine Ansicht des Luftkanals (1) sowie eine Schnittdarstellung entsprechend der in der Ansicht dargestellten Schnittlinie mit Rückstauklappe (2) in der Offenstellung,
Figur 4
zeigt eine Ansicht des Luftkanals (1) sowie eine Schnittdarstellung entsprechend der in der Ansicht dargestellten Schnittlinie mit Rückstauklappe (2) in der Schließstellung.
An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows
FIG. 1
A perspective view of the air duct (1) in installation position with closed backflow flap (2),
FIG. 2
a perspective view of the air duct (1) in installation position with open backflow flap (2),
FIG. 3
shows a view of the air duct (1) and a sectional view corresponding to the section line shown in the view with back pressure flap (2) in the open position,
FIG. 4
shows a view of the air duct (1) and a sectional view corresponding to the section line shown in the view with back pressure flap (2) in the closed position.

Figur 1 zeigt eine perspektivische Darstellung des Luftkanals 1 in Einbaulage mit geschlossener Rückstauklappe 2. Der Luftkanal 1 ist für den Einbau in eine nicht näher dargestellte Gebäudewand zur Abführung der Abluft einer Dunstabzugshaube oder eines Wäschetrockners geeignet. Der Luftkanal 1 ist mit einem rohrförmig ausgebildeten ersten Kanalabschnitt 3 welcher in einen im Querschnitt erweiterten Kanalabschnitt 4 mündet, ausgebildet. Der erweiterte Kanalabschnitt 4 bildet im Querschnittsübergang 5 zum ersten Kanalabschnitt 3 eine Anschlagfläche 6 (siehe Figur 2) für die Rückstauklappe 2, die in dem erweiterten Kanalabschnitt 4 schwenkbar gelagert ist. Die Rückstauklappe 2 wird in dem vom Gebläse einer Dunstabzugshaube erzeugten Luftstrom in die in Figur 2 gezeigte Offenstellung geschwenkt. Bei nicht eingeschaltetem Gebläse nimmt die durch Gewichtskraft vorbelastete Rückstauklappe 2 die in Figur 1 dargestellte Schließstellung ein und liegt an der Anschlagfläche 6 an, so dass sie den ersten Kanalabschnitt 3 dichtend abschließt. Figur 3 zeigt eine Ansicht des Luftkanals 1 sowie eine Schnittdarstellung entsprechend der in der Ansicht dargestellten Schnittlinie mit Rückstauklappe 2 in der Offenstellung. FIG. 1 shows a perspective view of the air duct 1 in installation position with closed backflow flap 2. The air duct 1 is suitable for installation in a building wall, not shown, for discharging the exhaust air of a cooker hood or a tumble dryer. The air duct 1 is formed with a tubular first channel section 3 which opens into a channel section 4 which is widened in cross-section. The extended channel section 4 forms in the cross-sectional transition 5 to the first channel section 3 a stop surface 6 (see FIG. 2 ) for the backwater valve 2, which is pivotally mounted in the extended channel section 4. The backflow flap 2 is in the air flow generated by the blower of an extractor hood in the in FIG. 2 pivoted open position shown. When not activated fan takes the biased by gravity backwater valve 2 in FIG. 1 shown closed position and abuts against the stop surface 6 so that it seals the first channel section 3. FIG. 3 shows a view of the air duct 1 and a sectional view corresponding to the section line shown in the view with backflow flap 2 in the open position.

Der Luftkanal 1 weist an seinem der Gebäudeaußenwand zugeordneten Endabschnitt einen Befestigungsflansch 7 auf, an dem z.B. ein nicht näher dargestelltes Lüftungsgitter befestigt werden kann. An dem der Abluftführung einer Dunstabzugshaube zugeordneten Ende ist der Lauftkanal 1 mit einem Anschlussstutzen 8 für die Abluftführung ausgebildet.The air duct 1 has at its outer wall of the building associated end portion a mounting flange 7, attached to the example as a not shown ventilation grille can be. At the exhaust air duct of an extractor hood associated end of the Lauftkanal 1 is formed with a connecting piece 8 for the exhaust air duct.

Die Schnittdarstellung in Figur 3 zeigt einen zylindrisch ausgebildeten ersten Kanalabschnitt 3 der in den im Querschnitt erweiterten Kanalabschnitt 4 mündet.The sectional view in FIG. 3 shows a cylindrically shaped first channel section 3 which opens into the expanded channel section 4 in cross-section.

Der erweiterte Kanalabschnitt 4 ist derart dimensioniert, dass die Rückstauklappe 2 sowie das Schwenklager 9 dafür nicht oder nur geringfügig in den Strömungsweg der Abluft der Dunstabzugshaube hineinragen.The extended channel section 4 is dimensioned such that the backflow flap 2 and the pivot bearing 9 do not or only slightly protrude into the flow path of the exhaust air of the hood.

Der in diesem Ausführungsbeispiel gezeigte erweiterte Kanalabschnitt 4 ist ausgehend vom äußeren Rand 10 der Anschlagfläche 6 konisch erweiternd ausgebildet. Die Anschlagfläche 6 für die Rückstauklappe 2 ist im Querschnittsübergang 5 in der Art einer auf einer Durchdringungslinie 11 eines zylindrischen Körpers verlaufenden Dichtkante ausgebildet. Die Rückstauklappe 2 weist eine Krümmung auf, wobei die in eine Bildebene projizierte Fläche der Rückstauklappe 2 eine kreisförmige Kontur aufweist und die Krümmung dem Verlauf der Mantelfläche des zylindrischen Körpers entspricht. Der Krümmungsradius der Rückstauklappe 2 ist durch den Radius des zylindrischen Körpers definiert, auf dessen Durchdringungslinie 11 die Dichtkante verläuft.The extended channel section 4 shown in this embodiment is designed to widen conically starting from the outer edge 10 of the stop surface 6. The stop surface 6 for the backflow flap 2 is formed in the cross-sectional transition 5 in the manner of a running on a penetration line 11 of a cylindrical body sealing edge. The backflow flap 2 has a curvature, wherein the projected into an image plane surface of the backflow flap 2 has a circular contour and the curvature corresponds to the course of the lateral surface of the cylindrical body. The radius of curvature of the backwater valve 2 is defined by the radius of the cylindrical body, on the penetration line 11, the sealing edge extends.

Das Schwenklager 9 für die Rückstauklappe 2 ist in Einbaulage des Luftkanals 1 bezogen auf die vertikale Mittellinie 12 des Luftkanals 1 auf einer unter einem Winkel zur Mittellinie verlaufenden Achse 13 am Innenmantel 14 des erweiterten Kanalabschnitts 4 angeordnet. Die Achse 13 verläuft in dem dargestellten Ausführungsbeispiel unter einem Winkel von 45° zur vertikalen Mittellinie12. Der Rückstauklappe 2 ist dem Schwenklager 9 gegenüberliegend auf der Achse 13 eine Sicherungseinrichtung 15 zugeordnet, die die Rückstauklappe 2 bei ausgeschaltetem Gebläse der Dunstabzugshaube in der Schließstellung (siehe Figur 4) hält. Die Sicherungseinrichtung 15 ist mit einem Magnet an der Rückstauklappe 2 sowie einem entsprechend angeordneten Gegenpol im Bereich der Anschlagfläche 6 ausgebildet. Gemäß einem weiteren nicht näher dargestellten Ausführungsbeispiel ist der erweiterte Kanalabschnitt 4 zylindrisch mit einem gegenüber dem ersten Kanalabschnitt 3 vergrößerten konstanten Durchmesser ausgebildet.The pivot bearing 9 for the backflow flap 2 is arranged in the installation position of the air duct 1 with respect to the vertical center line 12 of the air duct 1 on an axis 13 extending at an angle to the center line on the inner shell 14 of the widened channel section 4. The axis 13 extends in the illustrated embodiment at an angle of 45 ° to the vertical center line 12. The backwater valve 2 is the pivot bearing 9 opposite to the axis 13 associated with a safety device 15, the backflow flap 2 with the blower fan off in the closed position (see FIG. 4 ) holds. The securing device 15 is formed with a magnet on the backflow flap 2 and a correspondingly arranged opposite pole in the region of the stop surface 6. According to a further embodiment, not shown, the extended channel section 4 is cylindrical with a relation to the first channel section 3 enlarged constant diameter.

Claims (7)

  1. Air duct (1) for installation in a wall, comprising a tubular first duct portion (3) which opens into a duct portion (4) having an enlarged cross section, the enlarged duct portion (4) forming, in the cross-sectional transition (5) to the first duct portion (3), a stop surface (6) for a back-draught shutter (2) which is pivotally mounted in the enlarged duct portion (4) and is designed to be pivotable into the open position under the influence of an air flow generated by a fan and rests, biased by weight force, on the stop surface (6) when the fan is not switched on and sealingly closes the first duct portion (3),
    characterised in that
    the air duct (1) is substantially rotationally symmetrical,
    the enlarged duct portion (4) is tubular,
    the back-draught shutter (2) is curved, and
    the stop surface (6) for the back-draught shutter (2) is formed, in the cross-sectional transition (5), in the manner of a sealing edge that extends on a penetration line (11) of a cylindrical body that penetrates the first duct portion (3).
  2. Air duct (1) for installation in a wall according to claim 1,
    characterised in that
    the surface of the back-draught shutter (2) that is projected in an image plane in the direction of the longitudinal axis of the air duct has a circular contour in the closed state, and the curvature of the back-draught shutter (2) corresponds to the course of the lateral surface of the air duct.
  3. Air duct (1) for installation in a wall according to claim 2,
    characterised in that
    the diameter of the circular contour approximately corresponds to the external diameter of the first duct portion (3).
  4. Air duct (1) for installation in a wall according to any of the preceding claims,
    characterised in that
    the back-draught shutter (2) can freely swing open into the enlarged duct portion (3) and, owing to its curved shape, can substantially form an extension of the first duct portion.
  5. Air duct (1) for installation in a wall according to any of claims 1 to 4, characterised in that,
    in the installation position of the air duct (1), with respect to the vertical centreline (12) of the air duct (1), the pivot bearing (9) for the back-draught shutter (2) is arranged on the inner face (14) of the enlarged duct portion (4) on an axis (13) extending at an angle to the centreline (12).
  6. Air duct (1) for installation in a wall according to claim 5,
    characterised in that
    the axis (13) extends at an angle of 45° with respect to the vertical centreline (12).
  7. Air duct (1) for installation in a wall according to either claim 5 or claim 6,
    characterised in that
    a safety device (15), opposite the pivot bearing (9) on the axis (13), is associated with the back-draught shutter (2), which safety device holds the back-draught shutter (2) in the closed position.
EP11401592.8A 2011-09-14 2011-09-14 Air channel for installation in wall Active EP2570742B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11401592.8A EP2570742B1 (en) 2011-09-14 2011-09-14 Air channel for installation in wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11401592.8A EP2570742B1 (en) 2011-09-14 2011-09-14 Air channel for installation in wall

Publications (2)

Publication Number Publication Date
EP2570742A1 EP2570742A1 (en) 2013-03-20
EP2570742B1 true EP2570742B1 (en) 2017-11-15

Family

ID=45623084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11401592.8A Active EP2570742B1 (en) 2011-09-14 2011-09-14 Air channel for installation in wall

Country Status (1)

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EP (1) EP2570742B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105371338B (en) * 2015-12-11 2018-07-17 杭州蓝臣科技有限公司 A kind of non-return valve mounting assembly of oil smoke for being convenient for quickly unpicking and washing repair
DE102018205935A1 (en) * 2018-04-18 2019-10-24 Wilhelm Bruckbauer Wall box and ventilation system with a wall box

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005010912U1 (en) 2005-07-12 2005-11-10 Berbel Ablufttechnik Gmbh Air guiding case for use in building wall, has opening sealable by closure provided with thermal insulation, which is positionable in section of air pipes in closing position of closure and outside pipes in opening position of closure
WO2007059582A1 (en) * 2005-11-24 2007-05-31 Fantech Pty Ltd Backdraft damper
DE102006053208B4 (en) 2006-11-11 2009-09-03 Naber Holding Gmbh & Co. Kg wall box
DE102006056266B4 (en) 2006-11-27 2012-12-13 Miele & Cie. Kg Vapor extraction device with non-return valve pivotally mounted in the exhaust duct
DE102008044692B3 (en) 2008-08-28 2010-01-28 Miele & Cie. Kg Air duct for installation in building wall, has channel section which opens into enlarged channel section, where supporting frame has lattice-designed base with wall section formed and enclosed in circulating manner

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP2570742A1 (en) 2013-03-20

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