EP0214087B1 - Chimney top for the draught control in a flue - Google Patents

Chimney top for the draught control in a flue Download PDF

Info

Publication number
EP0214087B1
EP0214087B1 EP86810122A EP86810122A EP0214087B1 EP 0214087 B1 EP0214087 B1 EP 0214087B1 EP 86810122 A EP86810122 A EP 86810122A EP 86810122 A EP86810122 A EP 86810122A EP 0214087 B1 EP0214087 B1 EP 0214087B1
Authority
EP
European Patent Office
Prior art keywords
deflector
chimney
deflectors
cowl according
brackets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86810122A
Other languages
German (de)
French (fr)
Other versions
EP0214087A1 (en
EP0214087B2 (en
Inventor
Anthony Neefs
Hans Jörg Weidmann
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.)
Roweco
Original Assignee
Roweco
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
Priority claimed from BE0/215453A external-priority patent/BE903043A/en
Application filed by Roweco filed Critical Roweco
Priority to AT86810122T priority Critical patent/ATE39020T1/en
Publication of EP0214087A1 publication Critical patent/EP0214087A1/en
Publication of EP0214087B1 publication Critical patent/EP0214087B1/en
Application granted granted Critical
Publication of EP0214087B2 publication Critical patent/EP0214087B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/08—Tops for chimneys or ventilating shafts; Terminals for flues with coaxial cones or louvres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/12—Devices for fastening the top or terminal to chimney, shaft, or flue

Definitions

  • the present invention relates to a chimney hood for monitoring the draft in a chimney pipe, in particular a chimney, with a deflector which has a central opening and then a downwardly inclined surface, a second, completely closed deflector being provided above the first-mentioned deflector which completely covers at least the central opening of the first deflector.
  • a chimney hood of the type mentioned at the beginning shows, for example, CH-A-638'288 (Mitchell).
  • This known solution shows between the first and second deflectors a plurality of lamellae which, like the two deflectors, are each provided with a central opening. Between the upper deflector and the uppermost slats, a circular deflector element is arranged, which consists of two conical sheets facing each other, which works according to the Venturi principle and accelerates the wind blowing through, which creates a vacuum in the chimney pipe, which increases the draft of the chimney pipe.
  • the chimney hood shown in the figure mainly comprises two deflectors 1 and 2 mounted one above the other at a certain distance, which are fastened to a chimney 4 by means of fastening and supporting members 3, 30. Both deflectors have a circular outer edge 5, the deflector 1 below having a central, likewise circular opening 6.
  • the diameter of this central opening 6 is preferably in the order of magnitude between 38 and 45% of the outer diameter of the deflector 1.
  • the outer diameter is dimensioned such that it slightly projects beyond the outer parapet edge of the fireplace.
  • the deflector 2 which is mounted coaxially at a certain distance above the deflector 1, is completely closed, which means that it has no central opening. Otherwise, the surface shape 7 of both deflectors is approximately identical. More precisely, in this special embodiment the surface 7 of both deflectors 1 and 2 is concave in the area of its outer edge 5 and changes into a convex shape in the direction towards the center.
  • a constriction 8 is provided between the two deflectors 1 and 2, close enough above the central opening 6 of the deflector 1 below, so that the gases rising through the opening 6, as indicated by the arrow 9, accelerate when leaving the Experience opening.
  • this constriction 8 is determined by a guide plate 10 provided centrally under the named second deflector 2, which extends over the central opening 6 and has an approximately spherical side 11 directed towards the opening. Consequently, the baffle in cooperation with the surface 7 of the deflector 1 causes a venturi effect.
  • the guide plate 10 mounted on the underside of the second deflector 2 forms a cavity 12 with the latter.
  • the curved part of the guide plate 10 extends over the central opening 6 of the deflector 1 to its inner edge 13. This results in an under the second deflector 2 annular, dome-like vault 14.
  • the entire construction of the chimney hood is designed so that it can be fully assembled or disassembled with just a few screws without a weld.
  • the deflectors 1 and 2, as well as the guide plate 10, which have ring-shaped regions running in an approximately horizontal plane, are provided with corresponding through holes arranged one above the other.
  • plastic screws 15 which lead through the above-mentioned through holes, the two parts are firmly screwed together on plastic spacers 16, which are provided with corresponding threads.
  • the spacer bolts 16 stand near the inner edge 13 of the lower deflector 1 thereon and define the desired distance between the two deflectors 1 and 2.
  • support members 17 are arranged which run exactly under the spacer bolts 16.
  • the support members 17 are also provided with through bores which correspond to the through bores in the lower deflector 1 in the installed position. Again with plastic screws 18, the support members 17 are screwed together with the deflector 1 to the spacer bolts 16.
  • the support members 3 have the shape of cut from strips Material manufactured support bracket, which have a double bend in the edge region 5 of the lower deflector 1.
  • the support surface 19 of the support bracket 17 can be provided with a pre-pressed bow point so that the support distance between the edge of the chimney and the outer edge 5 of the lower deflector 1 can be adjusted in height.
  • the shaped as a support bracket 17 have an arm 20 which protrude from the inner edge 13 of the central opening of the first deflector 1 in the assembled state down into the chimney.
  • the lower ends of the arms 20, the support members 17 are interconnected by fastening members 30.
  • the fastening members 30 consist of a ring 31 and patinated screws 32 which pass through the ring 31 and one arm 20 of the support members 17.
  • the screws 32 are secured by means of screw sleeves 33 held in the arms 20.
  • the length of the spacer bolts define the distance between the upper and lower deflectors. Depending on the size of the chimney hood, the length of the spacer bolts 16 must be adjusted. If the distance between the deflectors is too large, the desired effect flattens out; if the distance between the deflectors 1 and 2 is too small, the backflow becomes too large.
  • the length of the spacer bolts 16 should be between 20 and 45% of the size of the diameter of the opening 6. Optimal values were achieved with a length of the spacer bolts of approximately 30% of the diameter of the opening 6.
  • the turbulence T thus prevents the entry of wind and thus stops the venturi effect. In this way, the escape of the heated gases from the chimney 4 is delayed and thus unnecessary heat loss is slowed down.
  • the existing thermals in the chimney mean that enough gases can still rise from the chimney. The stopped suction effect, however, reduces the fire in the furnace, which can save heating energy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chimneys And Flues (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

1. A chimney cowl used to control the draft in a chimney, in particular a brick chimney, having a first deflector which has a central opening the adjacent surfaces being inclined downwards and having a second, completely closed deflector (2) fixedly and concentrally arranged above said first deflector (1), characterised in that said completely closed second deflector (2) has a convex downwardly inclined form, carrying at its underside a dish shaped baffle (10) of a diameter smaller than said second deflector, so that the annular area (14) constituted by the outer area of said baffle and the outer area of said second deflector has a dome shaped cross section.

Description

Die vorliegende Erfindung betrifft eine Kaminhaube zur Ueberwachung des Zuges in einem Kaminrohr, insbesondere einem Schornstein, mit einem Deflektor, welcher eine zentrale Oeffnung und daran anschliessend eine nach unten geneigte Oberfläche aufweist, wobei über dem erst genannten Deflektor ein zweiter, vollständig geschlossener Deflektor vorgesehen ist, der mindestens die zentrale Oeffnung des ersten Deflektors vollständig überdeckt.The present invention relates to a chimney hood for monitoring the draft in a chimney pipe, in particular a chimney, with a deflector which has a central opening and then a downwardly inclined surface, a second, completely closed deflector being provided above the first-mentioned deflector which completely covers at least the central opening of the first deflector.

Eine Kaminhaube der eingangs genannten Art zeigt beispielsweise die CH-A-638'288 (Mitchell). Diese bekannte Lösung zeigt zwischen dem ersten und zweiten Deflektor mehrere Lamellen, die wie die beiden Deflektoren je mit einer zentralen Oeffnung versehen sind. Zwischen dem oberen Deflektor und der obersten Lamellen ist ein kreisrundes Abweiselement angeordnet, welches aus zwei kegelförmigen gegeneinander gerichtete Bleche besteht, welches nach dem Venturiprinzip arbeitend den durchstreichenden Wind beschleunigt, wodurch ein Unterdruck im Kaminrohr entsteht, der den Zug des Kaminrohres erhöht.A chimney hood of the type mentioned at the beginning shows, for example, CH-A-638'288 (Mitchell). This known solution shows between the first and second deflectors a plurality of lamellae which, like the two deflectors, are each provided with a central opening. Between the upper deflector and the uppermost slats, a circular deflector element is arranged, which consists of two conical sheets facing each other, which works according to the Venturi principle and accelerates the wind blowing through, which creates a vacuum in the chimney pipe, which increases the draft of the chimney pipe.

Dieser Effekt ist wünschenswert, wenn die Feuerungsanlage die mit dem Kaminrohr in Verbindung steht in Betrieb genommen wird. Der Venturi-Effekt bleibt jedoch erhalten, wenn bereits die Betriebstemperatur erreicht ist und somit ein grosser termischer Auftrieb im Kamin wirkt. Dies führt dazu, dass während dem Dauerbetrieb ein hoher Energieverlust auftritt.This effect is desirable when the firing system connected to the chimney pipe is put into operation. The Venturi effect is retained, however, when the operating temperature has already been reached and thus a large thermal lift in the chimney. This means that there is a high energy loss during continuous operation.

Es ist die Aufgabe der vorliegenden Erfindung, einen Kaminhut der eingangs genannten Art derart zu verbessern, dass während der Anfeuerungsperiode der Venturi-Effekt erhalten bleibt, jedoch bei Erreichen einer bestimmten Betriebstemperatur im Kamin der thermische Auftrieb im Kaminrohr gebremst wird, wodurch der Energieverbrauch gesenkt wird.It is the object of the present invention to improve a chimney hat of the type mentioned in such a way that the venturi effect is retained during the lighting period, but the thermal lift in the chimney pipe is slowed down when a certain operating temperature in the chimney is reached, as a result of which the energy consumption is reduced .

Diese Aufgabe löst eine Kaminhaube der eingangs genannten Art mit den Merkmalen des kennzeichnenden Teiles des Patentanspruches 1. In der Zeichnung ist ein bevorzugtes Ausführungsbeispiel des Erfindungsgegenstandes dargestellt und anhand der nachfolgenden Beschreibung erläutert.

  • Figur 1 zeigt eine perspektivische Darstellung der Kaminhaube und
  • Figur 2 stellt die auf einen Kamin montierte Kaminhaube, teilweise im Schnitt, dar.
This object is achieved by a chimney hood of the type mentioned at the outset with the features of the characterizing part of patent claim 1. A preferred embodiment of the subject matter of the invention is shown in the drawing and explained with the aid of the following description.
  • Figure 1 shows a perspective view of the chimney hood and
  • Figure 2 shows the chimney mounted on a chimney, partly in section.

Die in der Figur dargestellte Kaminhaube umfasst zur Hauptsache zwei in einem bestimmten Abstand übereinander montierte Deflektoren 1 und 2, welche mittels Befestigungs- und Stützorganen 3, 30 auf einem Kamin 4 befestigt sind. Beide Deflektoren zeigen einen kreisförmigen Aussenrand 5, wobei der untenliegende Deflektor 1 eine zentrale, ebenfalls kreisförmige Oeffnung 6 aufweist. Der Durchmesser dieser zentralen Oeffnung 6 liegt vorzugsweise in der Grössenordnung zwischen 38 und 45 % des Aussendurchmesser des Deflektors 1. Der Aussendurchmesser ist so bemessen, dass er den äusseren Brüstungsrand des Kamins etwas überragt.The chimney hood shown in the figure mainly comprises two deflectors 1 and 2 mounted one above the other at a certain distance, which are fastened to a chimney 4 by means of fastening and supporting members 3, 30. Both deflectors have a circular outer edge 5, the deflector 1 below having a central, likewise circular opening 6. The diameter of this central opening 6 is preferably in the order of magnitude between 38 and 45% of the outer diameter of the deflector 1. The outer diameter is dimensioned such that it slightly projects beyond the outer parapet edge of the fireplace.

Der Deflektor 2, der koaxial in einem bestimmten Abstand über den Deflektor 1 montiert ist, ist vollständig geschlossen, dass heisst er weist keine zentrale Oeffnung auf. Ansonsten ist die Oberflächenform 7 beider Deflektoren annähernd identisch. Genauer ist in dieser speziellen Ausführungsform die Oberfläche 7 beider Deflektoren 1 und 2 im Bereiche ihres äusseren Randes 5 konkav und geht in Richtung zur Mitte in eine konvexe Form über.The deflector 2, which is mounted coaxially at a certain distance above the deflector 1, is completely closed, which means that it has no central opening. Otherwise, the surface shape 7 of both deflectors is approximately identical. More precisely, in this special embodiment the surface 7 of both deflectors 1 and 2 is concave in the area of its outer edge 5 and changes into a convex shape in the direction towards the center.

Erfindungsgemäss ist zwischen den beiden Deflektoren 1 und 2, nahe genug über der zentralen Oeffnung 6 des unten liegenden Deflektors 1, eine Einengung 8 vorgesehen, so dass die durch die Oeffnung 6 aufsteigenden Gase, wie durch den Pfeil 9 angegeben, eine Beschleunigung beim Verlassen der Oeffnung erfahren. In der dargestellten Ausführungsform wird diese Verengung 8 durch eine zentrisch unter dem genannten zweiten Deflektor 2 vorgesehenen Leitblech 10 bestimmt, welches sich über der zentralen Oeffnung 6 erstreckt und eine zur Oeffnung gerichtete etwa kugelförmige Seite 11 aufweist. Folglich bewirkt das Leitblech in Zusammenwirkung mit der Oberfläche 7 des Deflektors 1 ein Venturi-Effekt. Das an der Unterseite des zweiten Deflektors 2 montierte Leitblech 10 bildet mit jenem einen Hohlraum 12. Das Leitblech 10 erstreckt sich mit seinem gewölbten Teil über der zentralen Oeffnung 6 des Deflektors 1 bis zu dessen inneren Rand 13. Dadurch entsteht unter dem zweiten Deflektor 2 ein ringförmiges, kuppelartiges Gewölbe 14.According to the invention, a constriction 8 is provided between the two deflectors 1 and 2, close enough above the central opening 6 of the deflector 1 below, so that the gases rising through the opening 6, as indicated by the arrow 9, accelerate when leaving the Experience opening. In the embodiment shown, this constriction 8 is determined by a guide plate 10 provided centrally under the named second deflector 2, which extends over the central opening 6 and has an approximately spherical side 11 directed towards the opening. Consequently, the baffle in cooperation with the surface 7 of the deflector 1 causes a venturi effect. The guide plate 10 mounted on the underside of the second deflector 2 forms a cavity 12 with the latter. The curved part of the guide plate 10 extends over the central opening 6 of the deflector 1 to its inner edge 13. This results in an under the second deflector 2 annular, dome-like vault 14.

Die gesamte Konstruktion der Kaminhaube ist so ausgelegt, dass sie ohne Schweissnaht mit lediglich wenigen Schrauben vollständig montiert beziehungsweise demontiert werden kann. Die Deflektoren 1 und 2, sowie das Leitblech 10, die in etwa horizontale Ebene verlaufende ringförmigen Bereiche aufweisen, sind mit übereinander angeordneten, korrespondierenden Durchgangslöchern versehen. Mittels Kunststoffschrauben 15, die durch die vorgenannten Durchgangslöcher führen, sind die beiden Teile auf Distanzbolzen 16 aus Kunststoff, die mit entsprechenden Gewinden versehen sind, fest aufeinander geschraubt. Die Distanzbolzen 16 stehen nahe dem inneren Rand 13 des unteren Deflektors 1 auf denselben auf und definieren den gewünschten Abstand zwischen den beiden Deflektoren 1 und 2. Unterhalb des unteren Deflektors 1 sind Stützorgane 17 angeordnet, die genau unter den Distanzbolzen 16 verlaufen. Auch die Stützorgane 17 sind mit Durchgangsbohrungen versehen, die mit den Durchgangsbohrungen im unteren Deflektor 1 in der Montagelage korrespondieren. Wiederum mit Kunststoffschrauben 18 sind die Stützorgane 17 zusammen mit dem Deflektor 1 an den Distanzbolzen 16 geschraubt. Die Stützorgane 3 haben die Form von aus streifenförmig zugeschnittenen Material gefertigten Auflagebügel, die im Randbereich 5 des unteren Deflektors 1 eine doppelte Umbiegung aufweisen. Die Auflagefläche 19 des Auflagebügels 17 kann mit einer vorgepressten Bugstelle versehen sein, damit die Auflagedistanz zwischen Kaminrand und dem äusseren Rand 5 des unteren Deflektors 1 höheneinstellbar ist. Die als Auflagebügel geformte Stützorgane 17 haben einen Arm 20, der vom inneren Rand 13 der zentralen Oeffnung des ersten Deflektors 1 im montierten Zustand nach unten in den Kamin hineinragen. Die unteren Enden der Arme 20, der Stützorgane 17 sind untereinander durch Befestigunsorgane 30 miteinander verbunden. Die Befestigungsorgane 30 bestehen aus einem Ring 31 sowie patinierten Schrauben 32 die den Ring 31 und je einen Arm 20 der Stützorgane 17 durchsetzen. Die Schrauben 32 sind mittels in den Armen 20 gehaltenen Schraubhülsen 33 gesichert.The entire construction of the chimney hood is designed so that it can be fully assembled or disassembled with just a few screws without a weld. The deflectors 1 and 2, as well as the guide plate 10, which have ring-shaped regions running in an approximately horizontal plane, are provided with corresponding through holes arranged one above the other. By means of plastic screws 15, which lead through the above-mentioned through holes, the two parts are firmly screwed together on plastic spacers 16, which are provided with corresponding threads. The spacer bolts 16 stand near the inner edge 13 of the lower deflector 1 thereon and define the desired distance between the two deflectors 1 and 2. Below the lower deflector 1, support members 17 are arranged which run exactly under the spacer bolts 16. The support members 17 are also provided with through bores which correspond to the through bores in the lower deflector 1 in the installed position. Again with plastic screws 18, the support members 17 are screwed together with the deflector 1 to the spacer bolts 16. The support members 3 have the shape of cut from strips Material manufactured support bracket, which have a double bend in the edge region 5 of the lower deflector 1. The support surface 19 of the support bracket 17 can be provided with a pre-pressed bow point so that the support distance between the edge of the chimney and the outer edge 5 of the lower deflector 1 can be adjusted in height. The shaped as a support bracket 17 have an arm 20 which protrude from the inner edge 13 of the central opening of the first deflector 1 in the assembled state down into the chimney. The lower ends of the arms 20, the support members 17 are interconnected by fastening members 30. The fastening members 30 consist of a ring 31 and patinated screws 32 which pass through the ring 31 and one arm 20 of the support members 17. The screws 32 are secured by means of screw sleeves 33 held in the arms 20.

Die Länge der Distanzbolzen definieren den Abstand zwischen dem oberen und dem unteren Deflektor. Je nach Grösse der Kaminhaube muss die Länge der Distanzbolzen 16 angepasst sein. Ist die Distanz zwischen den Deflektoren zu gross, so verflacht der gewünschte Effekt, ist die Distanz zwischen den Deflektoren 1 und 2 zu klein, so wird der Rückstau zu gross. Die Länge der Distanzbolzen 16 sollten zwischen 20 und 45 % des Masses des Durchmessers der Oeffnung 6 betragen. Optimale Werte wurden bei einer Länge der Distanzbolzen von circa 30 % des Durchmessers der Oeffnung 6 erzielt.The length of the spacer bolts define the distance between the upper and lower deflectors. Depending on the size of the chimney hood, the length of the spacer bolts 16 must be adjusted. If the distance between the deflectors is too large, the desired effect flattens out; if the distance between the deflectors 1 and 2 is too small, the backflow becomes too large. The length of the spacer bolts 16 should be between 20 and 45% of the size of the diameter of the opening 6. Optimal values were achieved with a length of the spacer bolts of approximately 30% of the diameter of the opening 6.

Im Nachfolgenden sei die wirkungsweise der erfindungsgemässen Kaminhaube kurz beschrieben.The mode of operation of the chimney hood according to the invention is briefly described below.

Beim Anheizen besteht im Kamin kaum ein thermischer Auftrieb. Jeder, auch der geringste Wind der durch die Kaminhaube streicht, wird zwischen den beiden Deflektoren 1 und 2 durch das Leitblech 10 beschleunigt, weil dieses einen Venturi-Effekt bewirkt. Hierdurch entsteht im Kaminrohr ein gewünschter Sog, der die Feuerung positiv beeinflusst. Nach einer gewissen Feuerungszeit hat sich der Kamin 4 erwärmt und der thermische Auftrieb im Kamin nimmt mehr und mehr zu. Ohne den gewünschten Wärmeaustauscheffekt genügend vollbracht zu haben, treten die erhitzten Gase nach aussen. Ist der thermische Auftrieb gross, so prallen die erhitzten Gase auf das Leitblech 10 und steigen in das ringförmige kuppelartige Gewölbe 14, wo sie vom oberen Deflektor 2 nach unten abgebogen werden und eine Turbulenz T bewirken. Die Turbulenz T verunmöglicht so einen Windeintritt und stoppen somit den Venturi-Effekt. Auf diese Weise wird der Austritt der erhitzten Gase aus dem Kamin 4 verzögert und damit ein unnötiger Wärmeverlust gebremst. Die vorhandene Thermik im Kamin bewirkt, dass trotzdem noch genügend Gase aus dem Kamin aufsteigen können. Die gestoppte Sogwirkung jedoch vermindert den Brand in der Feuerungsanlage, wodurch Heizenergie gespart werden kann.There is hardly any thermal buoyancy in the chimney when heating up. Everyone, even the slightest wind that blows through the chimney hood, is accelerated between the two deflectors 1 and 2 by the guide plate 10, because this causes a Venturi effect. This creates a desired suction in the chimney pipe, which has a positive effect on the furnace. After a certain firing time, the chimney 4 has warmed up and the thermal buoyancy in the chimney increases more and more. Without having achieved the desired heat exchange effect, the heated gases escape to the outside. If the thermal buoyancy is high, the heated gases hit the baffle 10 and rise into the annular dome-like vault 14, where they are bent downwards by the upper deflector 2 and cause turbulence T. The turbulence T thus prevents the entry of wind and thus stops the venturi effect. In this way, the escape of the heated gases from the chimney 4 is delayed and thus unnecessary heat loss is slowed down. The existing thermals in the chimney mean that enough gases can still rise from the chimney. The stopped suction effect, however, reduces the fire in the furnace, which can save heating energy.

Claims (11)

  1. A chimney cowl used to control the draft in a chimney, in particular a brick chimney, having a first deflector which has a central opening the adjacent surfaces being inclined downwards and having a second, completely closed deflector (2) fixedly and concentrally arranged above said first detractor (1), characterised in that said completely closed second deflector (2) has a convex downwardly inclined form, carrying at its underside a dish shaped baffle (10) of a diameter smaller than said second deflector, so that the annular area (14) constituted by the outer area of said baffle and the outer area of said second deflector has a dome shaped cross section.
  2. 2. A chimney cowl according to claim 1, characterised in that the surface of the first deflector (1) being downwardly concave in its outer edge area merging into a convex form towards its central opening (6).
  3. 3- A chimney cowl according to claim 2, characterized in that the two deflectors (1, 2) have almost identical surfaces in the overlapping area, the diameter of the central opening (6) in the first deflector being 38 to 45 % of the outer diameter of said first deflector.
  4. 4. A chimney cowl according to claim 1, characterized in that the two deflectors (1, 2) are connected to each other so as to be separable.
  5. 5. A chimney cowl according to claim 4, characterized in that the deflectors (1, 2) are connected to each so as to be separable, this being done by help of distance pieces (16) with bolts (15,18) the length of said distance pieces being between 20 and 45% of the diameter of the central opening (6) in the first deflector.
  6. 6. A chimney cowl according to claim 1, characterized in that the first deflector (1) is provided with supporting and securing elements (3, 30), by means of which the cowl can be secured at the desired distance above the chimney (4).
  7. 7. A chimney cowl according to claim 6, characterized in that the supporting elements (3) merge into brackets (17) that are secured to the lower side of the first deflector (1) whilst the supporting elements (3) are formed by a double bend (19) of said brackets.
  8. 8. A chimney cowl according to claim 6, characterized in that the securing elements (30) consist of a ring (31) and screws (32) that are secured therein and oriented radially outwards.
  9. 9. A chimney cowl according to claim 5, characterized in that the two deflectors (1, 2) and the dish shaped baffle (10) each have horizontal, annular areas that are vertically arranged one above the other, said annular areas having bore holes through which plastic screws (15, 16) pass, thereby clampingly securing distance pieces (16) between said two deflectors.
  10. 10. A chimney cowl according to claims 5 or 7 or 8 and 9 characterized by brackets (17) extending and passing below the underside of the first deflector as far as the central opening, said brackets having bore holes in alignment with the bore holes in the first deflector, said brackets being bent vertically downwards for holding a ring (31) by help of mounting screws (32) passing through said ring and said brackets.
  11. 11. A chimney cowl according to claim 9, characterized in that length of the distance pieces (16) is between 20 and 45 % of the diameter of the opening (6) in the lower deflector (1).
EP86810122A 1985-08-09 1986-03-12 Chimney top for the draught control in a flue Expired - Lifetime EP0214087B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86810122T ATE39020T1 (en) 1985-08-09 1986-03-12 CHIMNEY HOOD FOR MONITORING THE DRAW IN A CHIMNEY PIPE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE0/215453A BE903043A (en) 1985-08-09 1985-08-09 Draught-controlling chimney cowl - has narrow passage accelerating gases between coaxial top and bottom deflectors
BE215453 1985-08-09

Publications (3)

Publication Number Publication Date
EP0214087A1 EP0214087A1 (en) 1987-03-11
EP0214087B1 true EP0214087B1 (en) 1988-11-30
EP0214087B2 EP0214087B2 (en) 1993-01-27

Family

ID=3843918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810122A Expired - Lifetime EP0214087B2 (en) 1985-08-09 1986-03-12 Chimney top for the draught control in a flue

Country Status (3)

Country Link
EP (1) EP0214087B2 (en)
AT (1) ATE39020T1 (en)
DE (1) DE3661333D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9514174D0 (en) * 1995-07-12 1995-09-13 Hodgson Robert Cowl
DE69628094T2 (en) * 1995-07-12 2004-04-01 Hodgson, Robert, Chichester chimney cap
FR2846073B1 (en) * 2002-10-21 2005-01-14 Michel Zaniewski STATIC EXTRACTOR ANTI-FLUOR FOR SMOKE
CZ14206U1 (en) * 2004-01-22 2004-04-05 Novatex Perfekt S. R. O. Chimney head, particularly for removal of combustion products
DE202014101816U1 (en) 2014-04-16 2015-07-20 Welipa Ag Wind deflector and wind deflector system
CN109114578B (en) * 2018-10-25 2024-02-27 泰山学院 Chimney cover capable of preventing flue gas from flowing backward and promoting indoor and outdoor air exchange

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1088908A (en) * 1964-12-03 1967-10-25 Gulf Oil Corp Venting apparatus
CH552176A (en) * 1972-05-01 1974-07-31 Pernet Edmond CHIMNEY CAPE.
BE903043A (en) * 1985-08-09 1985-12-02 Weidmann Rosemarie Draught-controlling chimney cowl - has narrow passage accelerating gases between coaxial top and bottom deflectors

Also Published As

Publication number Publication date
EP0214087A1 (en) 1987-03-11
EP0214087B2 (en) 1993-01-27
DE3661333D1 (en) 1989-01-05
ATE39020T1 (en) 1988-12-15

Similar Documents

Publication Publication Date Title
DE2201317A1 (en) HEAT STORING BOILER
DE10054815A1 (en) Wind power system for locating on roofs to obtain electric power, has impeller mounted on roof so as to drive electric generator, in which impeller and generator are integral parts of roof ridge cover
EP0214087B1 (en) Chimney top for the draught control in a flue
DE3410078C2 (en) Ceiling air outlet for high rooms
DE2801368C2 (en)
DE3012588C2 (en) Radiant burners, especially for gaseous fuel
CH361629A (en) Device for increasing the negative pressure in chimneys, ventilation shafts, pipes and the like
DE3151327A1 (en) Chimney for carrying away flue gases
DE69628094T2 (en) chimney cap
DE19728974A1 (en) Fireplace door with metal frame and heat-resistant transparent sheet
CH685356A5 (en) Zuluftregelvorrichtung for a heater.
DE3302225A1 (en) Cap for exhaust gas ducts
DE69001197T2 (en) BOILER SECTION FOR LOW TEMPERATURE BOILERS.
DE2924963C2 (en) Chimney head for air-exhaust chimneys
DE60004765T2 (en) PROTECTION DEVICE
DE19509746A1 (en) Flame-heated cross-flow fan-assisted oven
EP0293332B1 (en) Chimney cowl
DE202005011978U1 (en) Chimney furnace connecting device, has securing unit used after mounting device to connect upper annular unit with lower annular unit such that pivoting movement of lower unit is possible around pivoting axis of upper unit
EP0322570A1 (en) Cowl for a chimney
DE3237216A1 (en) Chimney cowl for central heating installations with atomising burners
CH689699A5 (en) Zuluftregelvorrichtung for a heater.
DE3542383A1 (en) Fireplace insert
CH678549A5 (en) Chimney extension to control smoke discharge - comprises circular annular bodies with domed surfaces detachably secured together by distance pieces
DE3438724A1 (en) Incoming-air outlet for hall ventilation
DE19815493A1 (en) Cap for chimney with discharge air pipe and inlet pipe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB LI NL

17P Request for examination filed

Effective date: 19870813

17Q First examination report despatched

Effective date: 19880517

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB LI NL

REF Corresponds to:

Ref document number: 39020

Country of ref document: AT

Date of ref document: 19881215

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3661333

Country of ref document: DE

Date of ref document: 19890105

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19890331

Year of fee payment: 4

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: INVENTINA AG

Effective date: 19890830

NLR1 Nl: opposition has been filed with the epo

Opponent name: INVENTINA AG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19901001

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910311

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920312

GBPC Gb: european patent ceased through non-payment of renewal fee
PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19930127

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH DE FR GB LI NL

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930315

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930329

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19930331

Year of fee payment: 8

ET3 Fr: translation filed ** decision concerning opposition
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930521

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930621

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19940312

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940331

Ref country code: CH

Effective date: 19940331

Ref country code: BE

Effective date: 19940331

BERE Be: lapsed

Owner name: ROWECO

Effective date: 19940331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19941130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19941201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST