EP0940632B1 - Extractor hood - Google Patents

Extractor hood Download PDF

Info

Publication number
EP0940632B1
EP0940632B1 EP99104375A EP99104375A EP0940632B1 EP 0940632 B1 EP0940632 B1 EP 0940632B1 EP 99104375 A EP99104375 A EP 99104375A EP 99104375 A EP99104375 A EP 99104375A EP 0940632 B1 EP0940632 B1 EP 0940632B1
Authority
EP
European Patent Office
Prior art keywords
air
extractor hood
another
housing edge
edge parts
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 - Lifetime
Application number
EP99104375A
Other languages
German (de)
French (fr)
Other versions
EP0940632A1 (en
Inventor
Jochen Dipl.-Ing. Klemm (Fh)
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0940632A1 publication Critical patent/EP0940632A1/en
Application granted granted Critical
Publication of EP0940632B1 publication Critical patent/EP0940632B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/20Removing cooking fumes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/16Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166Combinations of two or more pumps ; Producing two or more separate gas flows using fans

Definitions

  • the invention relates to an extractor hood according to the preamble of claim 1.
  • An extractor hood of this type is from the utility model DE-GM 78 02 041 U1 known.
  • the radial fan housings are each about one Third of its scope is open. Your open pages face each other. Between they have vertical swivel axes of two flaps. With recirculation mode of the flaps they extend in front of a vertical plane in which the two Rotation axes of the radial fans lie in the radial fans in close to them Rotors and thereby prevent their air flows between the two rotors can get into the rear part of the extractor hood.
  • the flaps When the flaps are in the exhaust mode, their free ends extend forward to a front opening edge of the blower housing so that the Air flows from both radial fans between their rotors into the rear Guide part of the extractor hood.
  • the rotor of the radial fan arranged on the right seen in plan view rotates clockwise, and the rotor of the left one Radial blower seen from above in a counterclockwise direction.
  • the blowers have spiral casings through which the one formed between them and their rotors Distance in the direction of rotor rotation is increasingly wider.
  • a radial fan with spiral casing of this type is also from the utility model DE-G 83 08 512.2 U1 known.
  • the bottom of the extractor hoods is usually through one Grid or perforated plate or another air-permeable plate-like element is formed, over which a grease filter is arranged.
  • DE utility model 1 987 333 is an extractor hood with a grease filter, an odor filter with activated carbon known for separating odors and a fan, which in this order are arranged in a housing.
  • DE utility model 91 05 430.3 an extractor hood is known, in which a fan in the air flow path is arranged between a grease filter and an odor filter.
  • Recirculation mode means that the extracted from the extractor hood over a hotplate in a kitchen Air after passing through the grease filter and any, if any Odor filter is poured back into the kitchen.
  • Exhaust mode means that the air cleaned in the extractor hood from the kitchen into the Free is headed.
  • Extractor hoods according to the invention are used in particular as undercounter hoods Use, which can be mounted under an upper cabinet, which over a hotplate is arranged in the kitchen.
  • the object of the invention is to achieve a better efficiency To achieve air flows for recirculation and exhaust air operation, especially in the Blowers and at their air outlets for both recirculation and exhaust air operation to create the same flow conditions. Few parts are required for this be and the size can be kept small.
  • Another advantage of the invention is that the complete Width of the blower housing can be exploited to ensure optimal Helical shape of the air plenum between the impellers and their fan housings to realize.
  • One remains in both exhaust air mode and recirculation mode Get the optimal shape of the screw and the fan air flows are very short Way out of the blowers. This results in both operating modes an equal, high efficiency of the fan air delivery. For the invention only a few parts are required and a small size can be maintained.
  • the extractor hood 2 according to the invention shown schematically in Figure 3 has a Housing 4 with a front wall 6, side walls 7, a rear wall 8, a top wall 10 and a bottom 12, the latter at least in the range of two in the housing 4 housed fans or radial blowers 14 and 16 permeable to air is. Located in the airway between the housing base 12 and the fans 16 a grease filter, not shown.
  • an odor filter which acts as an odor absorbing material
  • the extractor hood can be set to either recirculation mode or exhaust air mode.
  • the outlet air flows of the two radial fans 14 and 16 through circulating air outlet openings 22 and 24, which are in an inclined front section the top wall 10 are formed, flow back into the room (kitchen) from which the air is sucked through the housing base 12 by the blowers 14 and 16 has been.
  • the exhaust air flows of the two fans 14 and 16 in the housing 4 to the rear and then either to a ceiling exhaust opening 26 or are directed to a rear wall exhaust opening 28, from where they through a not shown Exhaust air duct from the kitchen can be directed to the outside.
  • the Exhaust openings 26 and 28 can initially be closed during the manufacture of the housing 4 stay and then select one during installation over a hotplate 26 or the other 28 can be opened.
  • the radial fan 14 is left and the radial fan 16 arranged on the right, the air outlet openings 22 and 24 are located are in front of the rotor axes of rotation 18 and 20, and the exhaust openings 26 and 28 behind the rotor axes of rotation 18 and 20.
  • the two radial fans 14 and 16 are mirror images arranged to each other.
  • the housing peripheral wall 32 of the fan housing 30 surrounds the impeller arranged in it, hereinafter called rotor 34, spirally, so that the air space formed between the housing peripheral wall 32 and the rotor 34 in the direction of rotation of the rotor has an increasingly larger cross-section.
  • the rotor 34 of the left Fan 14 rotates counterclockwise 36 as viewed in plan view the rotor 34 of the right blower 16 rotates clockwise 38.
  • the Blades 40 of the rotors 34 are only schematically shown as an example.
  • the exhaust air streams of the two blowers 14 and 16 in contact with one another are in Fig.1 for recirculation mode by forward arrows 42 and 43 and in 2 schematically shown for exhaust air operation by arrows 44 and 45 directed towards the rear.
  • the air intakes of the blowers 14 and 16 can be made in any known manner are arranged and are therefore not shown.
  • the air outlets of the two Blowers are each through an air outlet opening 50 and 54 in the housing peripheral wall 32 formed.
  • Each of the two air outlet openings 50 and 54 is circumferential by a front housing edge part 51 or 55 and a rear housing edge part 52 or 56 limited. In the transverse direction of the extractor hood are on the one hand the front housing edge parts 51 and 55 are arranged opposite one another and the rear housing edge parts 52 and 56 are arranged opposite one another.
  • the two fan housings 30, but at least their housing peripheral walls 32 with the air outlet openings 50 and 54, are about one to the theoretical axes of rotation 18 and 20 of the rotors 34 are axial or coincident with the vertical axis of rotation between a rotational position shown in FIG. 1 for recirculation mode and one in Fig.2 shown rotating position for exhaust air rotation.
  • the air outlet openings 50 and 54th directed diagonally towards each other.
  • the two air outlet openings 50 and 54 are obliquely to the rear arranged opposite each other.
  • the housing edge parts 51, 52, 55 and 56 have such a radial length and axial Width that the two rear at the rotary position shown in Fig.1 for recirculation mode Housing edge parts 52 and 56 of the air outlet openings 50 and 54 between the are arranged so close to one another, preferably to one another concern that they together form an air barrier, which an air flow from the Air outlet openings 50 and 54 blocked to the rear.
  • the design is such that further in the rotary position shown in Fig.2 for exhaust air operation, the two front housing edge parts 51 and 55 are so closely spaced between the two rotors 34 are, preferably touching each other, that together they form an air barrier, which forwards an air flow from the air outlet openings 50 and 54 lock.
  • the fan housing 30 or at least its housing peripheral wall 32 can either individually or together in each case manually around the rotor axes of rotation 18 or 20 can be adjusted between the two rotary positions. So that both housing peripheral walls 32 with their air outlet openings 50 and 54 the exact at each rotation adjustment To reach the rotational position of Fig.1 or Fig.2, it is appropriate to by to connect mechanical connecting means so that they are synchronized together are adjustable between the two rotational positions of Fig.1 and 2.
  • a mechanical Connection means can be, for example, a rack 60, which has on both sides a toothing 62 and 63, in which an outer peripheral toothing 64 of the left blower housing 30 or an outer peripheral toothing 65 of the right blower housing 30 engages.
  • the rack 60 can from the front (or from the back) of the extractor hood 2 between manually the front position shown in Fig.1 for recirculation mode and that shown in Fig.2 rear position for exhaust air operation can be adjusted, both at the same time Housing peripheral walls 32 with the air drain openings 50 and 54 between the two 1 and 2 shown in the rotational positions adjusted.
  • Other mechanical Connecting means for manual actuation of the two housing peripheral walls 32 can be cables, for example.
  • an air guide 66 is arranged centrally to them, which in the exhaust air operation shown in Fig.2, the air outlet flows 44th and 45 of the two fans upwards to the ceiling exhaust air opening 26.
  • the rear housing edge parts 52 and 56 border on side walls of the air baffle 66, preferably on these side walls fit tightly so that no leakage air can escape laterally.
  • the air baffle 66 could be used for the exhaust air operation shown in Fig.2 air elements the rear housing edge parts 52 and 56 up to the rear wall exhaust opening 28 extend.

Description

Die Erfindung betrifft eine Dunstabzugshaube gemäß dem Oberbegriff von Anspruch 1.The invention relates to an extractor hood according to the preamble of claim 1.

Eine Dunstabzugshaube dieser Art ist aus dem Gebrauchsmuster DE-GM 78 02 041 U1 bekannt. In ihr sind zwei Radialgebläse mit vertikalen Rotationsachsen parallel nebeneinander angeordnet. Die Gehäuse der Radialgebläse sind je über ungefähr ein Drittel ihres Umfanges offen. Ihre offenen Seiten sind einander zugewandt. Zwischen ihnen befinden sich vertikale Schwenkachsen von zwei Klappen. Bei Umluftbetrieb-Stellung der Klappen erstrecken sie sich vor einer Vertikalebene, in welcher die beiden Rotationsachsen der Radialgebläse liegen, in die Radialgebläse hinein bis nahe zu deren Rotoren und verhindem dadurch, daß deren Luftströme zwischen den beiden Rotoren hindurch in den hinteren Teil der Dunstabzugshaube gelangen können. Die Luftströme der beiden Radialgebläse prallen vor den Klappen frontal gegeneinander und strömen dann durch eine gelochte Deckenplatte im vorderen Abschnitt der Dunstabzugshaube. Bei Abluftbetrieb-Stellung der Klappen erstrecken sich ihre freien Enden nach vorne bis zu einem vorderen öffnungsrand der Gebläsegehäuse, so daß sie die Luftströme von beiden Radialgebläsen zwischen deren Rotoren hindurch in den hinteren Teil der Dunstabzugshaube leiten. Der Rotor des rechts angeordneten Radialgebläses dreht sich in Draufsicht gesehen im Uhrzeigersinn, und der Rotor des links angeordneten Radialgebläses in Draufsicht gesehen im Gegenuhrzeigersinn. Die Gebläse haben Spiralgehäuse, durch welche der zwischen ihnen und ihren Rotoren gebildete Abstand in Rotordrehrichtung zunehmend breiter ausgebildet ist. Ein Radialgebläse mit Spiralgehäuse dieser Art ist auch aus dem Gebrauchsmuster DE-G 83 08 512.2 U1 bekannt. Der Boden der Dunstabzugshauben ist normalerweise durch ein Gitter oder Lochblech oder ein anderes luftdurchlässiges plattenartiges Element gebildet, über welchem ein Fettfilter angeordnet ist. Aus dem DE-Gebrauchsmuster 1 987 333 ist eine Dunstabzugshaube mit einem Fettfilter, einem Geruchsfilter mit Aktivkohle zum Abscheiden von Gerüchen und einem Gebläse bekannt, welche in dieser Reihenfolge in einem Gehäuse angeordnet sind. Aus dem DE-Gebrauchsmuster 91 05 430.3 ist eine Dunstabzugshaube bekannt, bei welcher ein Gebläse im Luftströmungsweg zwischen einem Fettfilter und einem Geruchsfilter angeordnet ist. "Umluftbetrieb" bedeutet, daß die von der Dunstabzugshaube über einer Kochstelle in einer Küche abgesaugte Luft, nachdem sie durch den Fettfilter und den gegebenenfalls vorhandenen Geruchsfilter geströmt ist, wieder in die Küche zurückgeleitet wird. "Abluftbetrieb" bedeutet, daß die in der Dunstabzugshaube gereinigte Luft aus der Küche heraus in das Freie geleitet wird.An extractor hood of this type is from the utility model DE-GM 78 02 041 U1 known. In it are two radial fans with vertical axes of rotation parallel to each other arranged. The radial fan housings are each about one Third of its scope is open. Your open pages face each other. Between they have vertical swivel axes of two flaps. With recirculation mode of the flaps they extend in front of a vertical plane in which the two Rotation axes of the radial fans lie in the radial fans in close to them Rotors and thereby prevent their air flows between the two rotors can get into the rear part of the extractor hood. The air flows of the two radial fans collide with each other in front of the flaps and then flow through a perforated ceiling plate in the front section of the extractor hood. When the flaps are in the exhaust mode, their free ends extend forward to a front opening edge of the blower housing so that the Air flows from both radial fans between their rotors into the rear Guide part of the extractor hood. The rotor of the radial fan arranged on the right seen in plan view rotates clockwise, and the rotor of the left one Radial blower seen from above in a counterclockwise direction. The blowers have spiral casings through which the one formed between them and their rotors Distance in the direction of rotor rotation is increasingly wider. A radial fan with spiral casing of this type is also from the utility model DE-G 83 08 512.2 U1 known. The bottom of the extractor hoods is usually through one Grid or perforated plate or another air-permeable plate-like element is formed, over which a grease filter is arranged. From DE utility model 1 987 333 is an extractor hood with a grease filter, an odor filter with activated carbon known for separating odors and a fan, which in this order are arranged in a housing. From DE utility model 91 05 430.3 an extractor hood is known, in which a fan in the air flow path is arranged between a grease filter and an odor filter. "Recirculation mode" means that the extracted from the extractor hood over a hotplate in a kitchen Air after passing through the grease filter and any, if any Odor filter is poured back into the kitchen. "Exhaust mode" means that the air cleaned in the extractor hood from the kitchen into the Free is headed.

Dunstabzugshauben gemäß der Erfindung finden insbesondere als Unterbauhauben Verwendung, welche unter einen Oberschrank montiert werden können, welcher über einer Kochstelle in der Küche angeordnet ist.Extractor hoods according to the invention are used in particular as undercounter hoods Use, which can be mounted under an upper cabinet, which over a hotplate is arranged in the kitchen.

Durch die Erfindung soll die Aufgabe gelöst werden, einen besseren Wirkungsgrad der Luftströme für Umluftbetrieb und Abluftbetrieb zu erzielen, insbesondere in den Gebläsen und an ihren Luftauslässen sowohl für Umluftbetrieb als auch für Abluftbetrieb die gleichen Strömungsverhältnisse zu schaffen. Hierfür sollen wenige Teile erforderlich sein und die Baugröße klein gehalten werden können.The object of the invention is to achieve a better efficiency To achieve air flows for recirculation and exhaust air operation, especially in the Blowers and at their air outlets for both recirculation and exhaust air operation to create the same flow conditions. Few parts are required for this be and the size can be kept small.

Diese Aufgabe wird gemäß der Erfindung durch die kennzeichnenden Merkmale von Anspruch 1 gelöst.This object is achieved according to the invention by the characterizing features of Claim 1 solved.

Durch die Erfindung bleiben die Strömungsverhältnisse in den beiden Gebläsen und der Strömungsquerschnitt ihrer Luftauslässe bei beiden Betriebsarten Umluftbetrieb und Abluftbetrieb absolut gleich. Ein weiterer Vorteil der Erfindung ist, daß die komplette Breite der Gebläsegehäuse ausgenutzt werden kann, um eine optimale Schneckenform des Luftsammelraumes zwischen den Laufrädern und ihren Gebläsegehäusen zu realisieren. Sowohl bei Abluftbetrieb als auch bei Umluftbetrieb bleibt eine optimale Schneckenform erhalten und die Gebläseluftströme werden auf sehr kurzem Weg aus den Gebläsen herausgeleitet. Dadurch ergibt sich bei beiden Betriebsarten ein gleicher, hoher Wirkungsgrad der Gebläseluftförderung. Für die Erfindung werden nur wenige Teile benötigt und es kann eine kleine Baugröße eingehalten werden.Through the invention, the flow conditions in the two fans and the flow cross-section of their air outlets in both modes of recirculation and exhaust air operation absolutely the same. Another advantage of the invention is that the complete Width of the blower housing can be exploited to ensure optimal Helical shape of the air plenum between the impellers and their fan housings to realize. One remains in both exhaust air mode and recirculation mode Get the optimal shape of the screw and the fan air flows are very short Way out of the blowers. This results in both operating modes an equal, high efficiency of the fan air delivery. For the invention only a few parts are required and a small size can be maintained.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Die Erfindung wird im folgenden mit Bezug auf die Zeichnungen anhand einer bevorzugten Ausführungsform als Beispiel beschrieben. In den Zeichnungen zeigen

Fig.1
schematisch eine Draufsicht auf eine Dunstabzugshaube nach der Erfindung im Querschnitt I-I von Fig. 3 gesehen, wobei die Dunstabzugshaube auf Umluftbetrieb eingestellt ist,
Fig.2
eine schematische Draufsicht der Dunstabzugshaube von Fig.1, jedoch bei Einstellung auf Abluftbetrieb,
Fig.3
schematisch eine verkleinerte perspektivische Außenansicht der Dunstabzugshaube.
The invention is described below with reference to the drawings using a preferred embodiment as an example. Show in the drawings
Fig.1
schematically seen a plan view of an extractor hood according to the invention in cross section II of Fig. 3, wherein the extractor hood is set to recirculation mode,
Fig.2
1 shows a schematic top view of the extractor hood from FIG. 1, but when it is set to exhaust air operation,
Figure 3
schematically shows a reduced perspective external view of the extractor hood.

Die in Fig.3 schematisch dargestellte Dunstabzugshaube 2 nach der Erfindung hat ein Gehäuse 4 mit einer Frontwand 6, Seitenwänden 7, einer Rückwand 8, einer Deckwand 10 und einem Boden 12, welch letzterer mindestens im Bereich von zwei im Gehäuse 4 untergebrachten Ventilatoren oder Radialgebläsen 14 und 16 luftdurchlässig ist. Im Luftweg zwischen dem Gehäuseboden 12 und den Gebläsen 16 befindet sich ein nicht dargestellter Fettfilter. Außerdem kann ein Geruchsfilter, welcher als Geruchsaufnahmematerial beispielsweise Aktivkohle enthalten kann, im Strömungsweg vor oder nach den Radialgebläsen 14 und 16 angeordnet sein. Ihre Rotor-Drehachsen 18 und 20 sind mit Abstand und parallel zueinander vertikal angeordnet. Die Dunstabzugshaube kann wahlweise auf Umluftbetrieb oder auf Abluftbetrieb eingestellt werden. Bei Umluftbetrieb können die Auslaßluftströme der beiden Radialgebläse 14 und 16 durch Umluft-Auslaßöffnungen 22 und 24, welche in einem schrägen vorderen Abschnitt der Deckwand 10 gebildet sind, in den Raum (Küche) zurückströmen, aus welchem die Luft durch den Gehäuseboden 12 von den Gebläsen 14 und 16 angesaugt wurde. Bei Abluftbetrieb können die Auslaßluftströme der beiden Gebläse 14 und 16 im Gehäuse 4 nach hinten und dann entweder zu einer Decken-Abluftöffnung 26 oder zu einer Rückwand-Abluftöffnung 28 geleitet werden, von wo sie durch eine nicht dargestellte Abluftleitung aus der Küche heraus in das Freie geleitet werden können. Die Abluftöffnungen 26 und 28 können bei der Herstellung des Gehäuses 4 zunächst geschlossen bleiben und dann bei der Installation über einer Kochstelle wahlweise die eine 26 oder die andere 28 geöffnet werden.The extractor hood 2 according to the invention shown schematically in Figure 3 has a Housing 4 with a front wall 6, side walls 7, a rear wall 8, a top wall 10 and a bottom 12, the latter at least in the range of two in the housing 4 housed fans or radial blowers 14 and 16 permeable to air is. Located in the airway between the housing base 12 and the fans 16 a grease filter, not shown. In addition, an odor filter, which acts as an odor absorbing material For example, can contain activated carbon in the flow path be arranged before or after the radial blowers 14 and 16. Your rotor axes of rotation 18 and 20 are vertically spaced apart and parallel to each other. The extractor hood can be set to either recirculation mode or exhaust air mode. In recirculation mode, the outlet air flows of the two radial fans 14 and 16 through circulating air outlet openings 22 and 24, which are in an inclined front section the top wall 10 are formed, flow back into the room (kitchen) from which the air is sucked through the housing base 12 by the blowers 14 and 16 has been. In exhaust air operation, the exhaust air flows of the two fans 14 and 16 in the housing 4 to the rear and then either to a ceiling exhaust opening 26 or are directed to a rear wall exhaust opening 28, from where they through a not shown Exhaust air duct from the kitchen can be directed to the outside. The Exhaust openings 26 and 28 can initially be closed during the manufacture of the housing 4 stay and then select one during installation over a hotplate 26 or the other 28 can be opened.

Wie aus den Zeichnungen 1, 2 und 3 ersichtlich ist, ist das Radialgebläse 14 links und das Radialgebläse 16 rechts angeordnet, die Umluftauslaßöffnungen 22 und 24 befinden sich vor den Rotordrehachsen 18 und 20, und die Abluftöffnungen 26 und 28 befinden sich hinter den Rotordrehachsen 18 und 20.As can be seen from the drawings 1, 2 and 3, the radial fan 14 is left and the radial fan 16 arranged on the right, the air outlet openings 22 and 24 are located are in front of the rotor axes of rotation 18 and 20, and the exhaust openings 26 and 28 behind the rotor axes of rotation 18 and 20.

Gemäß den Figuren 1 und 2 sind die beiden Radialgebläse 14 und 16 spiegelbildlich zueinander angeordnet. Die Gehäuseumfangswand 32 der Gebläsegehäuse 30 umgibt das in ihm angeordnete Laufrad, im folgenden Rotor 34 genannt, spiralförmig, so daß der zwischen Gehäuseumfangswand 32 und Rotor 34 gebildete Luftraum in Rotordrehrichtung einen zunehmend größeren Querschnitt hat. Der Rotor 34 des linken Gebläses 14 dreht sich in Draufsicht gesehen im Gegenuhrzeigersinn 36, während sich der Rotor 34 des rechten Gebläses 16 im Uhrzeigersinn 38 dreht. Von den Schaufeln 40 der Rotoren 34 sind nur einige wenige als Beispiel schematisch dargestellt. Die einander kontaktierenden Auslaßluftströme der beiden Gebläse 14 und 16 sind in Fig.1 für Umluftbetrieb durch nach vorne gerichtete Pfeile 42 und 43 und in Fig.2 für Abluftbetrieb durch nach hinten gerichtete Pfeile 44 und 45 schematisch dargestellt. Die Lufteinlässe der Gebläse 14 und 16 können in beliebiger bekannter Weise angeordnet werden und sind deshalb nicht dargestellt. Die Luftauslässe der beiden Gebläse sind je durch eine Luftauslaßöffnung 50 bzw. 54 in der Gehäuseumfangswand 32 gebildet. Jede der beiden Luftauslaßöffnungen 50 und 54 ist in Umfangsrichtung durch einen vorderen Gehäuserandteil 51 bzw. 55 und einen hinteren Gehäuserandteil 52 bzw. 56 begrenzt. In Querrichtung der Dunstabzugshaube sind einerseits die vorderen Gehäuserandteile 51 und 55 einander gegenüberliegend angeordnet und die hinteren Gehäuserandteile 52 und 56 sind einander gegenüberliegend angeordnet.According to Figures 1 and 2, the two radial fans 14 and 16 are mirror images arranged to each other. The housing peripheral wall 32 of the fan housing 30 surrounds the impeller arranged in it, hereinafter called rotor 34, spirally, so that the air space formed between the housing peripheral wall 32 and the rotor 34 in the direction of rotation of the rotor has an increasingly larger cross-section. The rotor 34 of the left Fan 14 rotates counterclockwise 36 as viewed in plan view the rotor 34 of the right blower 16 rotates clockwise 38. Of the Blades 40 of the rotors 34 are only schematically shown as an example. The exhaust air streams of the two blowers 14 and 16 in contact with one another are in Fig.1 for recirculation mode by forward arrows 42 and 43 and in 2 schematically shown for exhaust air operation by arrows 44 and 45 directed towards the rear. The air intakes of the blowers 14 and 16 can be made in any known manner are arranged and are therefore not shown. The air outlets of the two Blowers are each through an air outlet opening 50 and 54 in the housing peripheral wall 32 formed. Each of the two air outlet openings 50 and 54 is circumferential by a front housing edge part 51 or 55 and a rear housing edge part 52 or 56 limited. In the transverse direction of the extractor hood are on the one hand the front housing edge parts 51 and 55 are arranged opposite one another and the rear housing edge parts 52 and 56 are arranged opposite one another.

Die beiden Gebläsegehäuse 30, mindestens jedoch ihre Gehäuseumfangswände 32 mit den Luftauslaßöffnungen 50 und 54, sind um eine zu den theoretischen Drehachsen 18 und 20 der Rotoren 34 axiale bzw. mit ihnen zusammenfallende vertikale Drehachse zwischen einer in Fig.1 gezeigten Drehposition für Umluftbetrieb und einer in Fig.2 gezeigten Drehposition für Abluftbetrieb drehverstellbar angeordnet. Bei der in Fig.1 gezeigten Drehstellung für Umluftbetrieb sind die Luftauslaßöffnungen 50 und 54 schräg nach vorne gegeneinander gerichtet. Bei der in Fig.2 dargestellten Drehposition für Abluftbetrieb sind die beiden Luftauslaßöffnungen 50 und 54 schräg nach hinten einander gegenüberliegend angeordnet. Bei der Drehverstellung der Gehäuseumfangswände 32 von der Drehposition für Umluftbetrieb von Fig.1 in die Drehposition für Abluftbetrieb nach Fig.2 werden sie um etwa 45 bis 80 Grad in gleicher Drehrichtung 36 und 38 wie ihre Rotoren 34 verstellt. Bei der Umstellung von Abluftbetrieb auf Umluftbetrieb werden sie in umgekehrter Drehrichtung von der in Fig.2 gezeigten Position in die in Fig.1 gezeigte Position gedreht. Dabei werden die Luftauslaßöffnungen 50 und 54 durch einen zwischen den Rotoren 34 vorhandenen Zwischenraum hindurchgedreht.The two fan housings 30, but at least their housing peripheral walls 32 with the air outlet openings 50 and 54, are about one to the theoretical axes of rotation 18 and 20 of the rotors 34 are axial or coincident with the vertical axis of rotation between a rotational position shown in FIG. 1 for recirculation mode and one in Fig.2 shown rotating position for exhaust air rotation. At the in Fig. 1 shown rotary position for recirculation mode, the air outlet openings 50 and 54th directed diagonally towards each other. At the rotational position shown in Fig.2 for exhaust air operation, the two air outlet openings 50 and 54 are obliquely to the rear arranged opposite each other. When rotating the peripheral walls of the housing 32 from the rotary position for air recirculation mode from FIG. 1 to the rotary position for Exhaust air operation according to Fig. 2 will be approximately 45 to 80 degrees in the same direction 36 and 38 as their rotors 34 adjusted. When switching from exhaust air mode to recirculation mode they are in the reverse direction from the position shown in Fig.2 rotated into the position shown in Fig.1. The air outlet openings 50 and 54 are rotated through a space between the rotors 34.

Die Gehäuserandteile 51, 52, 55 und 56 haben eine solche radiale Länge und axiale Breite, daß bei der in Fig.1 gezeigten Drehposition für Umluftbetrieb die beiden hinteren Gehäuserandteile 52 und 56 der Luftauslaßöffnungen 50 und 54 zwischen den beiden Rotoren 34 so nahe beieinander angeordnet sind, vorzugsweise aneinander anliegen, daß sie zusammen eine Luftsperre bilden, welche eine Luftströmung aus den Luftauslaßöffnungen 50 und 54 nach hinten sperrt. Das Design ist derart, daß femer bei der in Fig.2 dargestellten Drehposition für Abluftbetrieb die beiden vorderen Gehäuserandteile 51 und 55 zwischen den beiden Rotoren 34 so nahe beieinander angeordnet sind, vorzugsweise einander berühren, daß sie zusammen eine Luftsperre bilden, welche eine Luftströmung aus den Luftauslaßöffnungen 50 und 54 nach vorne sperren. Die jeweils anderen Gehäuserandteile, 51 und 55 in Fig. 1 und 52 und 56 in Fig. 2, haben dabei in Querrichtung der Dunstabzugshaube jeweils einen Abstand voneinander, so daß zwischen ihnen beide Auslaßluftströme 42 und 43 in Fig.1 oder 44 und 45 in Fig.2 hindurchströmen können. Sie definieren somit gemeinsam eine einzige Auslaßöffnung für beide Gebläse.The housing edge parts 51, 52, 55 and 56 have such a radial length and axial Width that the two rear at the rotary position shown in Fig.1 for recirculation mode Housing edge parts 52 and 56 of the air outlet openings 50 and 54 between the are arranged so close to one another, preferably to one another concern that they together form an air barrier, which an air flow from the Air outlet openings 50 and 54 blocked to the rear. The design is such that further in the rotary position shown in Fig.2 for exhaust air operation, the two front housing edge parts 51 and 55 are so closely spaced between the two rotors 34 are, preferably touching each other, that together they form an air barrier, which forwards an air flow from the air outlet openings 50 and 54 lock. The respective other housing edge parts, 51 and 55 in Fig. 1 and 52 and 56 in Fig. 2, each have a distance in the transverse direction of the extractor hood from each other, so that between them both outlet air flows 42 and 43 in Fig.1 or 44 and 45 can flow through in Fig.2. Together you define one only outlet for both fans.

Die Gebläsegehäuse 30 oder mindestens ihre Gehäuseumfangswand 32 können entweder einzeln oder jeweils gemeinsam manuell um die Rotordrehachsen 18 bzw. 20 zwischen den beiden Drehpositionen verstellt werden. Damit beide Gehäuseumfangswände 32 mit ihren Luftauslaßöffnungen 50 und 54 bei jeder Drehverstellung die genaue Drehposition von Fig.1 oder von Fig.2 erreichen ist es zweckmäßig, sie durch mechanische Verbindungsmittel so zu verbinden, daß sie jeweils gemeinsam synchron zwischen den beiden Drehpositionen von Fig.1 und 2 verstellbar sind. Ein solches mechanisches Verbindungsmittel kann beispielsweise eine Zahnstange 60 sein, welche auf ihren beiden Seiten je eine Verzahnung 62 bzw. 63 hat, in welche eine Außenumfangsverzahnung 64 des linken Gebläsegehäuses 30 bzw. eine Außenumfangsverzahnung 65 des rechten Gebläsegehäuses 30 eingreift. Die Zahnstange 60 kann von der Vorderseite (oder von der Rückseite) der Dunstabzugshaube 2 manuell zwischen der in Fig.1 dargestellten vorderen Stellung für Umluftbetrieb und der in Fig.2 dargestellten hinteren Stellung für Abluftbetrieb verstellt werden, wobei sie gleichzeitig beide Gehäuseumfangswände 32 mit den Luftaulaßöffnungen 50 und 54 zwischen den beiden in den Fig.1 und 2 dargestellten Drehpositionen verstellt. Andere mechanische Verbindungsmittel zur manuellen Betätigung der beiden Gehäuseumfangswände 32 können beispielsweise Seilzüge sein.The fan housing 30 or at least its housing peripheral wall 32 can either individually or together in each case manually around the rotor axes of rotation 18 or 20 can be adjusted between the two rotary positions. So that both housing peripheral walls 32 with their air outlet openings 50 and 54 the exact at each rotation adjustment To reach the rotational position of Fig.1 or Fig.2, it is appropriate to by to connect mechanical connecting means so that they are synchronized together are adjustable between the two rotational positions of Fig.1 and 2. Such a mechanical Connection means can be, for example, a rack 60, which has on both sides a toothing 62 and 63, in which an outer peripheral toothing 64 of the left blower housing 30 or an outer peripheral toothing 65 of the right blower housing 30 engages. The rack 60 can from the front (or from the back) of the extractor hood 2 between manually the front position shown in Fig.1 for recirculation mode and that shown in Fig.2 rear position for exhaust air operation can be adjusted, both at the same time Housing peripheral walls 32 with the air drain openings 50 and 54 between the two 1 and 2 shown in the rotational positions adjusted. Other mechanical Connecting means for manual actuation of the two housing peripheral walls 32 can be cables, for example.

Hinter den beiden Gebläsen 14 und 16 ist mittig zu ihnen ein Luftleitkörper 66 angeordnet, welcher bei dem in Fig.2 dargestellten Abluftbetrieb die Luftauslaßströme 44 und 45 der beiden Gebläse nach oben zur Decken-Abluftöffnung 26 umlenkt. Bei Abluftbetrieb gemäß Fig.2 grenzen die hinteren Gehäuserandteile 52 und 56 an Seitenwände des Luftleitkörpers 66 an, wobei sie vorzugsweise an diesen Seitenwänden dicht anliegen, damit keine Leckluft seitlich entweichen kann. Anstelle des Luftleitkörpers 66 könnten für den in Fig.2 dargestellten Abluftbetrieb Luftelemente verwendet werden, welche die hinteren Gehäuserandteile 52 und 56 bis zu der Rückwand-Abluftöffnung 28 verlängern.Behind the two fans 14 and 16, an air guide 66 is arranged centrally to them, which in the exhaust air operation shown in Fig.2, the air outlet flows 44th and 45 of the two fans upwards to the ceiling exhaust air opening 26. With exhaust air operation 2, the rear housing edge parts 52 and 56 border on side walls of the air baffle 66, preferably on these side walls fit tightly so that no leakage air can escape laterally. Instead of the air baffle 66 could be used for the exhaust air operation shown in Fig.2 air elements the rear housing edge parts 52 and 56 up to the rear wall exhaust opening 28 extend.

Claims (6)

  1. Vapour extractor hood with two radial fans which are arranged to be axially parallel and adjacent to one another and the fan housings of which have an air outlet (50, 54) formed in a housing circumferential wall (32), the air outlets being arranged adjacent to one another and the air outlet flows thereof being selectably settable for circulatory operation or for exhaust operation, characterised in that the two fan housings (30) are each arranged to be rotationally adjustable, at least at their housing circumferential walls (32), together with their air outlets (50, 54) about a respective axis of rotation axial relative to the axis of rotation (18, 20) of the impeller (34) thereof between a rotational position for circulatory operation, in which the air outlets (50, 54) are arranged on the front side of the fan, and a rotational position for exhaust operation, in which the air outlets are arranged on the fan rear side.
  2. Vapour extractor hood according to claim 1, characterised in that the air outlets (50, 54) are rotatable through an intermediate space between the impellers (34).
  3. Vapour extractor hood according to one of the preceding claims, characterised in that mechanical connecting means (60, 62, 63, 64, 65) for synchronous rotational adjusting of the two air outlet openings (50, 54) are provided.
  4. Vapour extractor hood according to one of the preceding claims, characterised in that each air outlet (50, 54) is bounded in circumferential direction by a front housing edge part (51, 55) and a rear housing edge part (52, 56), that in transverse direction of the vapour extractor hood the front housing edge parts (51, 55) of the two air outlets are arranged opposite to one another and the rear housing outlets (52, 56) are arranged opposite one another, that in the rotational position for circulatory operation the two rear housing edge parts (52, 56) are so arranged adjacent to one another in the region between the two impellers (34) that they together form an air barrier for preventing an air flow to the rear, whilst the two front housing edge parts (51, 55) are arranged at a spacing from one another at the fan front side and bound therebetween an air outlet path, that in the rotational position for exhaust operation the two front housing edge parts (51, 55) are so arranged adjacent to one another between the two impellers (34) that they together form an air barrier for preventing an air flow to the front, whilst the two rear housing edge parts (52, 56) are arranged at a spacing from one another and laterally bound therebetween an air outlet path for the two fans.
  5. Vapour extractor hood according to one of the preceding claims, characterised in that air guide means (66), which are adjoined by the rear housing edge parts (52, 56) in the rotational setting for exhaust operation in order to guide the outlet air flows of the two fans to these air guide means (66), are arranged behind the fans (14, 16).
  6. Vapour extractor hood according to one of the preceding claims, characterised in that as seen in plan view the lefthand impeller (34) is drivable in anticlockwise sense (36) and the righthand impeller (34) is drivable in clockwise sense (38).
EP99104375A 1998-03-05 1999-03-04 Extractor hood Expired - Lifetime EP0940632B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19809562 1998-03-05
DE19809562A DE19809562A1 (en) 1998-03-05 1998-03-05 Extractor hood

Publications (2)

Publication Number Publication Date
EP0940632A1 EP0940632A1 (en) 1999-09-08
EP0940632B1 true EP0940632B1 (en) 2002-11-13

Family

ID=7859894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104375A Expired - Lifetime EP0940632B1 (en) 1998-03-05 1999-03-04 Extractor hood

Country Status (3)

Country Link
EP (1) EP0940632B1 (en)
DE (2) DE19809562A1 (en)
ES (1) ES2188048T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100591922C (en) * 2005-06-14 2010-02-24 鸿富锦精密工业(深圳)有限公司 Radiating mould assembly with double fan
CN102889625A (en) * 2012-09-03 2013-01-23 谈启明 Range hood
CN103104527A (en) * 2013-01-24 2013-05-15 梁挺 Double volute wind wheel fan

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006010122A (en) * 2004-06-23 2006-01-12 Matsushita Electric Ind Co Ltd High-frequency heating device having range hood
CN100447426C (en) * 2005-07-27 2008-12-31 台达电子工业股份有限公司 Centrifugal fan
DE102011051103A1 (en) * 2011-06-16 2012-12-20 Miele & Cie. Kg Extractor hood for a stove or hob
CN102889626B (en) * 2012-09-03 2015-09-16 谈启明 Range hood
EP3348912B1 (en) 2015-09-08 2021-05-12 Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. Range hood
CN105928168A (en) * 2016-06-21 2016-09-07 珠海格力电器股份有限公司 Air inlet structure provided with double centrifugal fans and air conditioner comprising air inlet structure
CN106482195A (en) * 2016-12-29 2017-03-08 宁波方太厨具有限公司 Series connection two fans noise reducing type range hood
CN110469524B (en) * 2019-07-25 2020-09-18 宁波方太厨具有限公司 Centrifugal fan and control method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7802041U1 (en) * 1978-01-24 1978-05-03 G. Bauknecht Gmbh, Elektrotechnische Fabriken, 7000 Stuttgart Cooker hood
DE3625975C2 (en) * 1986-07-31 1997-07-10 Lubbe Karlheinz Dipl Ing Switching device for the optional recirculation or exhaust air operation of an extractor hood

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100591922C (en) * 2005-06-14 2010-02-24 鸿富锦精密工业(深圳)有限公司 Radiating mould assembly with double fan
CN102889625A (en) * 2012-09-03 2013-01-23 谈启明 Range hood
CN102889625B (en) * 2012-09-03 2015-09-30 谈启明 Smoke exhaust ventilator
CN103104527A (en) * 2013-01-24 2013-05-15 梁挺 Double volute wind wheel fan

Also Published As

Publication number Publication date
DE19809562A1 (en) 1999-09-09
ES2188048T3 (en) 2003-06-16
EP0940632A1 (en) 1999-09-08
DE59903365D1 (en) 2002-12-19

Similar Documents

Publication Publication Date Title
EP1939456B1 (en) Air passage device
DE3741721A1 (en) HEAT COOKING DEVICE
EP2434162A2 (en) Handheld blowing device
EP0940632B1 (en) Extractor hood
EP0940633B1 (en) Extraction hood for kitchens
EP2476960B1 (en) Switching device for an extractor hood for switching between circulation and extraction
DE102008041739A1 (en) Exhaust hood
EP0114241A2 (en) Ventilation device
DE3017431C2 (en) Ventilation device for rooms with two separate flow paths for ventilation
EP3232127B1 (en) Extractor hood with outlet grid
EP3101350B1 (en) Fan unit for an extractor hood and extractor hood
DE3120569A1 (en) Kitchen vapour extractor hood
DE2649154A1 (en) KITCHEN FAN
CH703729A2 (en) Hot air oven has air conveyor that is provided in thermal contact with heater to convey the hot air from lateral ventilation opening through channel which is arranged below muffle
DE2615604B2 (en) Oven, in particular with means for pyrolytic cleaning with a cooling air fan
DE2503647A1 (en) LAUNDRY DRYERS
DE102005013806A1 (en) Extractor hood has suction fan and a flow direction element rotatable in suction area about rotational axis perpendicular to plane of same for improved vapour collection
EP1251324A1 (en) Cooling system for vehicles
DE2804027C2 (en) Device for soundproofing a fan built into a wall
EP2362153B1 (en) Air exchanging device
WO2008148675A2 (en) Oven
DE3003930A1 (en) OUTPUT SWITCH OF A COOKER HOOD
DE19835473A1 (en) Ventilating equipment for building comprises housing through which extends air flow path and at least one blower motor arranged and connected with fan wheel provided with fan blades
DE2933696A1 (en) VENTILATION SYSTEM FOR A COMBINATION OF A MICROWAVE OVEN AND AN EXHAUST AIR VENTILATION
DE1946127U (en) BLEED COVER.

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): DE ES FR GB IT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 19991108

AKX Designation fees paid

Free format text: DE ES FR GB IT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20020213

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59903365

Country of ref document: DE

Date of ref document: 20021219

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

Effective date: 20030315

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2188048

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030814

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

Ref country code: GB

Payment date: 20070323

Year of fee payment: 9

Ref country code: ES

Payment date: 20070323

Year of fee payment: 9

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

Ref country code: SE

Payment date: 20070326

Year of fee payment: 9

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

Ref country code: DE

Payment date: 20070331

Year of fee payment: 9

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

Ref country code: IT

Payment date: 20070605

Year of fee payment: 9

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

Ref country code: FR

Payment date: 20070321

Year of fee payment: 9

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080304

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081125

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080305

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081001

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20080305

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080304

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080305

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080304