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EP3574265B1 - Extractor hood - Google Patents

Extractor hood Download PDF

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Publication number
EP3574265B1
EP3574265B1 EP18700571.5A EP18700571A EP3574265B1 EP 3574265 B1 EP3574265 B1 EP 3574265B1 EP 18700571 A EP18700571 A EP 18700571A EP 3574265 B1 EP3574265 B1 EP 3574265B1
Authority
EP
European Patent Office
Prior art keywords
flow
extractor hood
air
duct
air supply
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.)
Active
Application number
EP18700571.5A
Other languages
German (de)
French (fr)
Other versions
EP3574265A1 (en
Inventor
Stefan Schabinger
Stefan Kratzmeier
Dirk Kesel
Andreas Thumm
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 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 Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL18700571T priority Critical patent/PL3574265T3/en
Publication of EP3574265A1 publication Critical patent/EP3574265A1/en
Application granted granted Critical
Publication of EP3574265B1 publication Critical patent/EP3574265B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGESĀ ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/20Removing cooking fumes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGESĀ ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/20Removing cooking fumes
    • F24C15/2035Arrangement or mounting of filters

Definitions

  • the present invention relates to an extractor hood.
  • the air extracted from extractor hoods for example above a cooking stove, is loaded with impurities such as water, fat, oil and the like.
  • Extractor hoods are known in which the air to be cleaned is sucked into the extractor hood via an edge gap.
  • An extractor device with edge suction is, for example, in EP 2 772 695 A1 described.
  • JP 2005 214584A describes an extractor hood in which a fan is arranged above a housing. Air is sucked into the housing via the blower. In addition, an auxiliary fan is provided adjacent to the fan through which air is discharged across the housing in the form of an air curtain.
  • JP2005098618A discloses an extractor hood in which, in addition to the extractor hood fan, an additional fan is arranged at the front edge of the extractor hood, via which an air curtain is output in the horizontal direction.
  • EP1757870A2 discloses a fume hood with a nozzle assembly at the front edge of the hood. Air is discharged onto a curved surface via the nozzles to discharge air downwards and backwards.
  • an extractor hood which has a first and a second housing.
  • a hood is accommodated in the first housing.
  • an insertion opening is provided, into which a cover part is inserted.
  • Inlet areas are formed in the cover part.
  • Air is conducted via the hood to an intake opening, behind which a fan is arranged.
  • the range hood has an exhaust opening for discharging a laminar flow of air along the inner wall surface offset upwards from the inlet area.
  • the blow-out opening is formed by a distance between the inner wall and a wall area of the housing, which extends upwards from the insertion opening.
  • the blow-off opening is connected to the exhaust air duct provided on a second housing via air supply ducts.
  • a disadvantage of this extractor hood is that it has a complex structure.
  • the WO 2015/166947 A discloses the features of the preamble of claim 1.
  • the object of the present invention is therefore to provide an extractor hood in which, with a simple structure, the deposition of particles on the extractor hood is reduced.
  • top and bottom or top and bottom relate to an extractor hood with a flow channel arranged horizontally in the extractor hood and parts thereof.
  • an extractor hood is preferably referred to as an extractor hood which can be used in the household, in particular in a kitchen, for removal and cleaning of cooking fumes, also known as vapors.
  • the extractor hood represents, for example, a ceiling-mounted or a wall-mounted extractor hood.
  • the extractor hood has a housing that can also be referred to as a viewing hood. There is a suction opening in the underside of the housing.
  • the housing forms at least part of a flow chamber.
  • the fan of the extractor hood which is also referred to as a fan, is preferably arranged in the flow space.
  • a negative pressure is generated by the blower, which is used to suck in contaminated air from around and in particular from below the extractor hood.
  • the polluted air also known as fumes, can enter the extractor hood through the suction opening located on the underside of the housing.
  • the extractor hood has at least one filter element on which the contaminated air can be cleaned.
  • the at least one filter element is preferably a filter element for filtering out particles, in particular fat, oil or water particles.
  • the filter element is preferably a flat element, one surface of which is used at least partially for the intake of contaminated air into the filter material. According to the invention, for example, expanded metal can be used as the filter material.
  • the filter element is preferably accommodated in a frame.
  • the frame can also be used to attach the filter element in the extractor hood.
  • the at least one filter element is preferably detachably arranged in the extractor hood and in particular in the housing.
  • the filter element is preferably a filter cassette and is also referred to as a grease filter.
  • the extractor hood includes a baffle plate.
  • the baffle plate represents an airtight component, which is preferably a disc or plate.
  • the baffle plate is arranged in or below the intake opening of the hood housing.
  • the baffle plate also serves as a deflection element, which prevents the uncontrolled and direct, ie immediate, flow of vapors flowing from below to the extractor hood onto the at least one filter element.
  • the baffle plate therefore preferably covers an area that is larger than the area of the filter element or, in the case of a plurality of filter elements, the filter elements.
  • the baffle plate preferably has a size that is smaller than the size of the suction opening of the housing. A gap is thus formed between the underside of the housing and the edge of the baffle plate, which is also referred to as the edge suction gap or edge suction area.
  • the housing forms at least part of a flow space.
  • the flow space includes a flow channel.
  • the area of the extractor hood is referred to as a flow channel that lies between the edge suction area and the at least one filter element provided in the housing.
  • the flow channel is particularly preferably delimited by the housing and the baffle plate.
  • the housing delimits the flow channel to the sides and to the top, and the baffle plate delimits the flow channel to the bottom. The housing thus at least partially forms the flow channel of the flow space of the extractor hood.
  • the vapor is directed to the at least one filter element within the extractor hood and in particular within the housing.
  • the flow channel includes an edge suction area.
  • the edge extraction area is defined by the gap between the housing and the baffle plate.
  • a web or other connecting means can be provided in the edge extraction area.
  • the part of the edge suction area that is permeable to air, that is, in which there are no webs, for example, is referred to as the entry opening of the edge suction area.
  • the entire edge extraction area to form the entry opening, so that fumes can enter the interior of the extractor hood over the entire edge extraction area. Since the edge suction area forms part of the flow channel, the vapor can thus enter the flow channel.
  • the flow channel preferably extends from the inlet opening of the edge suction area to the at least one filter element.
  • At least one deflection point is formed in the flow channel.
  • a point in the flow channel at which the direction of flow of the vapor in the flow channel is changed is referred to as a deflection point.
  • the deflection point is determined by the geometry of the flow channel itself.
  • the geometry of the flow channel depends on the geometry of the housing in interaction with the baffle plate.
  • these changes in direction are not caused by the geometry of the flow channel and therefore do not represent a deflection point within the meaning of the invention.
  • an air supply opening is provided in the area of at least one deflection point.
  • the air supply opening is particularly preferably provided on the flow channel in the area which is located at the deflection point or downstream of the deflection point in the direction of flow.
  • At the deflection point there can be a corner or a curvature of the housing, which causes the change in direction of the vapor flow.
  • the air supply opening is a recess.
  • the air supply opening is a hole or a slit.
  • the shape of the hole or the slot can be chosen freely.
  • more than one air supply opening can also be provided in the area of the deflection point of the flow channel.
  • the air which enters the flow channel through the air supply opening can be exhaust air or ambient air.
  • the vapor flow is advantageously influenced by the entry of air into the flow channel. Due to the entry of the air in the area of the deflection point of the flow channel, the vapor is deflected more effectively than in the devices that are known in the prior art and is thus guided to the filter element. Furthermore, the air that has entered through the air supply opening captures particles from the vapor passing by and thus also prevents the particles from being deposited in the flow channel and in particular on the housing of the extractor hood. This improves the grease label of the cooker hood overall. Furthermore, the deposit of visible grease in the intake area is avoided, thus increasing customer satisfaction. Another advantage is that the formation of accumulations of fat is avoided in an area from which the fat could drip down through the inlet opening of the extractor hood and onto the cooker.
  • the air supply opening is arranged at a distance from the inlet opening of the edge extraction area. Spaced within the meaning of the present invention means that the air supply opening and the inlet opening are not arranged in the immediate vicinity of one another and therefore have no points of contact.
  • the advantage of this embodiment is that the vapor first enters the flow channel via the inlet opening before it is influenced by the air that enters the flow channel through the air supply opening. In this way, account can be taken of the distance that the vapor, which has passed through the entry opening of the edge suction area, travels to the deflection point in the flow channel. Accordingly, it is ensured that the vapor is only influenced by the air that has entered in the area of the deflection point and not already, for example, when the vapor enters the flow channel.
  • the flow space includes an exhaust air duct.
  • the exhaust duct can be a pipe or duct that is perpendicular or parallel to the flow duct.
  • the area of the extractor hood is referred to as the exhaust air duct, which adjoins the filter element in the direction of flow.
  • the fan of the extractor hood is arranged in the exhaust air duct.
  • the exhaust air duct has an outlet opening through which the exhaust air can be discharged to the outside.
  • the exhaust air can be discharged into the room in which the extractor hood is operated or outside the building in which the extractor hood is operated.
  • the exhaust air duct can be formed at least partially by the housing of the extractor hood.
  • the exhaust air duct can also be formed by a separate component, for example a pipe, which can be covered with a fireplace, for example by a chimney.
  • the air supply opening is a bypass between the exhaust air duct and the flow duct.
  • the bypass fluidically connects the exhaust air duct to the flow duct.
  • part of the exhaust air can be routed from the exhaust air duct into the flow duct via the bypass. Because the bypass the air supply opening forms, the exhaust air is introduced into the flow channel in the area of the deflection point.
  • the bypass can be realized by a separate component, for example a tube.
  • the exhaust air duct is arranged above the flow duct and is adjacent to it.
  • the flow duct and the exhaust air duct particularly preferably run parallel at least in regions and have at least one contact point.
  • at least part of the flow duct lies horizontally and the exhaust air duct lies against the horizontal part of the flow duct.
  • the exhaust air duct therefore runs horizontally and the outlet opening of the extractor hood is preferably provided on the side of the extractor hood.
  • the exhaust air duct and the flow duct are separated from one another by a partition.
  • the intermediate wall is a flat component and is preferably a plate or sheet metal.
  • the intermediate wall can consist of sheet metal material, in particular stainless steel sheet metal.
  • the advantages of the present invention can be used particularly easily.
  • the distance between the exhaust air duct and the flow duct is only given by the intermediate wall.
  • the partition divides the flow space into two areas, namely the exhaust air duct and the flow duct.
  • the intermediate wall forms the top of the flow duct and the bottom of the exhaust air duct.
  • the exhaust duct is at this Embodiment limited upwards by the top of the housing.
  • the intermediate wall can be part of the housing or can be introduced into the housing as a separate component.
  • the air supply opening is arranged in the intermediate wall.
  • the air supply opening serves as a bypass between the exhaust air duct and the flow duct.
  • the air supply opening is provided as a recess in the form of a hole or slot in the intermediate wall.
  • the air supply opening is made in the material of the intermediate wall, for example by punching or lasering.
  • the advantage of the arrangement of the air supply opening in the intermediate wall is that a defined connection between the exhaust air duct and the flow duct can thereby be established in a simple manner.
  • the exhaust air in the exhaust air duct can be discharged outwards in the horizontal direction by the fan and the flow of vapor in the flow duct can be directed in the horizontal direction to the filter element.
  • the part of the exhaust air that enters the flow duct via the air supply opening thus preferably enters the flow duct in the vertical direction through the air supply opening.
  • part of the exhaust air can be introduced back into the flow duct in a targeted manner and can thus influence the vapors. Due to the pressure differences between the exhaust air duct and the flow duct, the entry of part of the exhaust air into the flow duct is promoted. This part of the exhaust air, which serves as supply air, generates a flow that can capture particles passing by in the vapor and thus prevent these particles from being deposited on the partition wall or the housing. At least the separation of particles is reduced. This improves the grease label of the extractor hood overall and lengthens the cleaning intervals. Furthermore, fewer particles are separated in the visible range, thus increasing customer satisfaction. Furthermore, the energy efficiency of the extractor hood is increased by using part of the exhaust air.
  • the air supply opening is designed as an air scoop.
  • An air supply opening is referred to as an air scoop, on the inlet side of which an air guiding element is arranged. Air from a flow along the air scoop is guided in a targeted manner to the air supply opening via the air guiding element. Since the air supply opening represents an air scoop, the supply of air to the flow channel in the area of the deflection point is promoted and the accumulation of particles is thus reduced or completely prevented.
  • the air scoop can be provided on an outer wall of the housing and can direct part of the ambient air into the flow channel. According to a preferred embodiment, however, the air scoop is formed between the exhaust air duct and the flow duct and is machined from the material of the intermediate wall.
  • the air scoop is worked out of the material of the partition wall, for example, by cutting, lasering or punching an opening or a slot in the material of the partition wall, which is usually sheet metal, and then the material in the area of the opening or slot is bent upwards.
  • the exhaust air duct is preferably located above the flow duct and in particular above the intermediate wall, the material bent upwards protrudes into the exhaust air duct.
  • the areas of the processed material of the intermediate wall that are bent upwards form projections that can have a tab-like shape. The tab is aligned in such a way that it is directed against the direction of flow of the exhaust air in the exhaust air duct and thus part of the exhaust air is captured by the air scoop and guided into the air supply opening.
  • the advantage of this embodiment is that the air scoop can be manufactured in a simple manner and enables a reliable supply of exhaust air into the flow channel.
  • At least one of the filter elements is accommodated in the intermediate wall between the exhaust air duct and the flow duct.
  • a filter element that is surrounded by the intermediate wall is referred to as being received within the meaning of the present invention.
  • the outer edge of the intermediate wall in perpendicular projection onto the filter element lies outside the edge of the flat filter element, that is, the surface of the filter element is surrounded by the inner edge of the intermediate wall in perpendicular projection.
  • the intermediate wall extends laterally, forwardly and rearwardly beyond the edges of the filter element. The intermediate wall thus forms a flat frame around the flat filter element.
  • the advantage of this embodiment is that a separate filter holder is not required.
  • the filter element below the intermediate wall or on the intermediate wall.
  • the intermediate wall has a passage opening that is covered by the filter element.
  • the air supply opening is arranged at a distance from the at least one filter element.
  • the air supply opening is arranged in an outer wall of the housing.
  • the advantage of this embodiment is that the air supply opening establishes a connection between the area surrounding the extractor hood, ie the room in which the extractor hood is operated, and the flow duct. As a result, ambient air can be sucked in and enter the flow channel through the air supply opening.
  • One advantage of this embodiment is that the routing of the exhaust air duct can be chosen freely, since it does not have to be in contact with the flow duct.
  • the exhaust air duct can extend vertically upwards and be screened by a chimney, for example.
  • the outer wall in which the at least one air supply opening is introduced can be one or more of the side walls of the housing and/or the top of the housing.
  • the air supply opening is arranged in such a way that it extends through the outer wall extends and ends inside the housing in the flow channel.
  • the air supply opening can be aligned horizontally, vertically or at an angle.
  • the flow channel is narrowed at the point of the air supply opening.
  • the advantage of this embodiment is that a negative pressure is set at the point of the air supply opening due to the narrowing of the flow channel. Ambient air or exhaust air is sucked in by this negative pressure and enters the flow channel.
  • This embodiment of the flow duct is used particularly advantageously in an extractor hood in which the air supply opening is made in an outer wall of the housing. Since the ambient air does not have a defined direction of flow, the negative pressure generated by the constriction or narrowing can generate an intake flow from the environment and thus ensure the reliable supply of air at the deflection point in the flow channel.
  • FIG 1 an area of an extractor hood according to the invention with a first embodiment of an air supply opening 16 in a flow channel 12 is shown. In the view shown, only the left half of the housing 1 of the extractor hood is shown.
  • the extractor hood includes a fan 13 which is arranged inside the housing 1 .
  • a suction opening is provided in the underside of the housing 1 .
  • This suction opening is covered by a baffle plate 15 in the middle area.
  • a rim suction area is formed between the baffle plate 15 and the side wall of the housing 1, which has an inlet opening 121, which preferably extends over the entire rim suction area.
  • an intermediate wall 14 is provided in the housing 1 inside the housing 1 and above the baffle plate 15 .
  • the intermediate wall 14 can be designed as part of the housing 1, ie it can be designed in one piece with the housing 1. However, it is also within the scope of the invention for the intermediate wall 14 to be a separate component which is fastened in the housing 1 .
  • the intermediate wall 14 lies parallel to the baffle plate 15.
  • a filter element 140 is accommodated below the fan 13 in the central area of the intermediate wall 14.
  • An air supply opening 16 is introduced in the outer area of the intermediate wall 14 .
  • a flow space 10 is formed in the housing 1 in the extractor hood and in the illustrated embodiment.
  • the flow space 10 comprises an exhaust air duct 11 and a flow duct 12.
  • the exhaust air duct 11 is bounded at the bottom by the intermediate wall 14 and at the top by the upper side of the housing 1.
  • the flow channel 12 is delimited at the top by the intermediate wall 14 and at the bottom by the baffle plate 15 .
  • the flow channel is delimited on the sides by the side wall of the housing 1 .
  • the partition 14 separates the exhaust air duct 11 from the flow duct 12.
  • the exhaust air duct 11 extends from the filter element 140 to the outlet opening 17 and the flow duct from the inlet opening 121 of the edge suction area to the filter element 140.
  • the fan 13 is arranged in the exhaust air duct 11 .
  • a negative pressure is generated in the flow channel 12
  • the Suction of contaminated air which is also referred to as fumes W
  • the baffle plate 15 prevents vapors from flowing directly against the filter element 140 in the extractor hood. Rather, the vapor W is conducted along the underside of the baffle plate 15 to the inlet opening 121 of the edge suction area of the flow channel 12 .
  • the vapor W that has entered is guided through the flow channel 12 to a filter element 140, through which it passes and is cleaned.
  • the exhaust air A is discharged to the outside through the outlet opening 17 due to the flow in the horizontal direction set by the blower 13 .
  • the flow channel 12 has a deflection point 120 at which the direction of flow of the vapor W is changed.
  • the deflection point 120 is a region of the flow channel 12 at which, due to the geometry of the flow channel 12 , the vapor W flowing in the flow channel 12 changes direction.
  • the geometry of the flow channel 12 is defined by the interaction of the housing 1 and, in the embodiment shown, the intermediate wall 14 with the baffle plate 15 .
  • an air supply opening 16 in the form of a bypass 160 is arranged at the deflection point 120 of the flow channel 12 .
  • the bypass 160 is designed as a recess in the intermediate wall 14 .
  • the bypass 160 thus establishes a connection between the exhaust air duct 11 and the flow duct 12 .
  • Part of the exhaust air A can enter the flow channel 12 in a targeted manner through this bypass 16 .
  • the flow that is generated by the part of the exhaust air A in the flow channel 12 can capture passing particles in the vapor W and thus prevent or at least reduce particles being deposited on the intermediate wall 14 .
  • figure 2 shows an area of an extractor hood according to the invention with a second embodiment of an air supply opening.
  • the bypass is designed as an air scoop 1600.
  • the air scoop 1600 is machined from the material of the intermediate wall 14 .
  • an opening is cut in the baffle 14 such that a portion of the material in the opening can be bent upwards.
  • the part of the material of the intermediate wall 14 which is bent upwards protrudes into the exhaust air duct 11 .
  • the upwardly bent material of the intermediate wall 14 defines a type of deflection element in the exhaust air duct 11.
  • the exhaust air A is partially directed through the air scoop 1600 into the flow duct 12 in a targeted manner.
  • a flow of the exhaust air A, which enters the flow channel 12, is favored by the pressure difference.
  • FIG 3 an area of an extractor hood according to the invention is shown with a third embodiment of an air supply opening.
  • figure 3 shows the same components as in general figure 1 and therefore will not be explained again.
  • the air supply opening 16 is not arranged in the intermediate wall 14 but in an outer wall of the housing 1 of the extractor hood.
  • ambient air U can enter the flow channel 12 .
  • the flow channel 12 is narrowed at the location of the air supply opening 16 in the view shown.
  • this embodiment represents a passive variant. Due to the narrowing of the flow channel 12 in the embodiment shown, a negative pressure is established, which draws in the ambient air U. As a result, the ambient air U enters the flow channel 12 and can capture particles in the vapor W, as a result of which these are not deposited on the intermediate wall 14 or the housing 1 or are deposited to a lesser extent.
  • figure 4 shows a flow channel 12 of an extractor hood according to the prior art.
  • This representation shows that the flow duct 12 is delimited by a housing 1 and a baffle plate 15 in extractor hoods in the prior art. Furthermore, the figure 4 that the vapor W enters through the inlet opening 121 of the edge suction area of the flow channel 12 . The vapor W is deflected in the flow channel 12, whereby the direction of flow of the vapor W is changed.
  • a deflection of the vapor W by 90Ā° is implemented in the suction gap constructions according to the prior art. Due to the high speed and the deflection of the fumes, particles P are deposited on the extractor hood itself, for example on housing 1. The disadvantage is that this increases the grease label of the extractor hood and shortens the cleaning intervals, and on the other hand that the deposits often are visible to the customer and therefore the hoods also lose their aesthetic appeal.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Separating Particles In Gases By Inertia (AREA)

Description

Die vorliegende Erfindung bezieht sich auf eine Dunstabzugshaube.The present invention relates to an extractor hood.

Die von Dunstabzugshauben, beispielsweise Ć¼ber einem Kochherd, abgesaugte Luft ist mit Verunreinigungen, wie Wasser, Fett, Ɩl und dergleichen beladen.The air extracted from extractor hoods, for example above a cooking stove, is loaded with impurities such as water, fat, oil and the like.

Es sind Dunstabzugshauben bekannt, bei denen die zu reinigende Luft Ć¼ber einen Randspalt in die Dunstabzugshaube eingesaugt wird. Eine Dunstabzugsvorrichtung mit Randabsaugung ist beispielsweise in EP 2 772 695 A1 beschrieben.Extractor hoods are known in which the air to be cleaned is sucked into the extractor hood via an edge gap. An extractor device with edge suction is, for example, in EP 2 772 695 A1 described.

Bei Dunstabzugshauben mit Randabsaugung sind unterschiedliche Ansaugspaltkonstruktionen bekannt. Beispielsweise kann eine Luftumlenkung um 90Ā° umgesetzt sein, die der Luftstrom ausfĆ¼hrt, bevor dieser zu einem Filterelemente in der Dunstabzugshaube gelangt. Durch die hohe Geschwindigkeit im Ansaugraum sowie durch die Umlenkung der Luft, kommt es zur Partikelabscheidung am GerƤt. Durch MassentrƤgheitseffekte wird vermehrt an den AuƟenseiten des Luftstroms an der Stelle, an der der Luftstrom umgelenkt wird, abgeschieden. Der Abscheidungsort hƤngt von der eingestellten Luftgeschwindigkeit, insbesondere der eingestellten GeblƤsestufe, ab und kann durch Tests detektiert werden. Die dort abgelagerten Partikel werden bei der Fettmessung als Gewichtszunahme des GerƤtes gewertet. Dadurch verschlechtert sich das Fettlabel massiv. Besonders kritisch ist dieses Fett, da es sich grĆ¶ĆŸtenteils im sichtbaren Bereich ablagert. Abgesehen von einer Herabsetzung der Optik des GerƤtes, kann es zu Tropfenbildung und zum Abtropfen auf einen unter der Dunstabzugshaube angeordneten Herd kommen.Different suction gap constructions are known for extractor hoods with edge extraction. For example, an air deflection of 90Ā° can be implemented, which the air flow performs before it reaches a filter element in the extractor hood. Due to the high speed in the intake chamber and the deflection of the air, particles are separated on the device. Mass inertia effects result in increased separation on the outside of the air flow at the point where the air flow is deflected. The separation location depends on the set air speed, in particular the set blower level, and can be detected by tests. The particles deposited there are evaluated as an increase in weight of the device during the fat measurement. As a result, the fat label deteriorates massively. This fat is particularly critical, since most of it is deposited in the visible area. Apart from degrading the optics of the device, it can lead to the formation of drips and dripping onto a stove placed under the extractor hood.

JP 2005 214584A beschreibt eine Dunstabzugshaube, in der ein GeblƤse oberhalb eines GehƤuses angeordnet ist. Ɯber das GeblƤse wird Luft in das GehƤuse eingesaugt. ZusƤtzlich ist ein ZusatzgeblƤse benachbart zu GeblƤse vorgesehen, Ć¼ber das Luft Ć¼ber das GehƤuse in Form eines Luftvorhangs ausgegeben wird. JP 2005 214584A describes an extractor hood in which a fan is arranged above a housing. Air is sucked into the housing via the blower. In addition, an auxiliary fan is provided adjacent to the fan through which air is discharged across the housing in the form of an air curtain.

JP2005098618A offenbart eine Dunstabzugshaube, bei der auƟer dem GeblƤse der Dunstabzugshaube an der Vorderkante der Dunstabzugshaube ein ZusatzgeblƤse angeordnet ist, Ć¼ber das ein Luftschleier in horizontaler Richtung ausgegeben wird. EP1757870A2 offenbart eine Dunstabzugshaube mit einer DĆ¼senanordnung an der Vorderkante der Haube. Ɯber die DĆ¼sen wird Luft auf eine gekrĆ¼mmte OberflƤche abgegeben, um Luft nach unten und hinten abzugeben. JP2005098618A discloses an extractor hood in which, in addition to the extractor hood fan, an additional fan is arranged at the front edge of the extractor hood, via which an air curtain is output in the horizontal direction. EP1757870A2 discloses a fume hood with a nozzle assembly at the front edge of the hood. Air is discharged onto a curved surface via the nozzles to discharge air downwards and backwards.

Aus der WO 2015/166947 A ist eine Dunstabzugshaube bekannt, die ein erstes und ein zweites GehƤuse aufweist. In dem ersten GehƤuse ist eine Haube aufgenommen. In der Unterseite des ersten GehƤuses ist eine EinfĆ¼hrƶffnung vorgesehen, in die ein Abdeckteil eingebracht ist. In dem Abdeckteil sind Einlassbereiche ausgebildet. Ɯber die Haube wird Luft zu einer Ansaugƶffnung geleitet, hinter der ein GeblƤse angeordnet ist. Die Dunstabzugshaube weist eine Ausblasƶffnung zur Ausgabe einer laminaren Luftstrƶmung entlang der inneren WandoberflƤche auf, die zu dem Einlassbereich nach oben versetzt ist. GemƤƟ einer AusfĆ¼hrungsform ist die Ausblasƶffnung durch einen Abstand zwischen der inneren Wand und einem Wandbereich des GehƤuses, der sich von der EinfĆ¼hrƶffnung nach oben erstreckt, gebildet. Die Ausblasƶffnung ist Ć¼ber LuftversorgungskanƤle mit dem Abluftkanal, der an einem zweiten GehƤuse vorgesehen ist, verbunden. Ein Nachteil dieser Dunstabzugshaube ist, dass diese einen aufwƤndigen Aufbau aufweist. Die WO 2015/166947 A offenbart die Merkmale des Oberbegriffs des Anspruchs 1.From the WO 2015/166947 A an extractor hood is known which has a first and a second housing. A hood is accommodated in the first housing. In the underside of the first housing, an insertion opening is provided, into which a cover part is inserted. Inlet areas are formed in the cover part. Air is conducted via the hood to an intake opening, behind which a fan is arranged. The range hood has an exhaust opening for discharging a laminar flow of air along the inner wall surface offset upwards from the inlet area. According to one embodiment, the blow-out opening is formed by a distance between the inner wall and a wall area of the housing, which extends upwards from the insertion opening. The blow-off opening is connected to the exhaust air duct provided on a second housing via air supply ducts. A disadvantage of this extractor hood is that it has a complex structure. the WO 2015/166947 A discloses the features of the preamble of claim 1.

Aufgabe der vorliegenden Erfindung ist es daher eine Dunstabzugshaube bereitzustellen, bei der bei einfachem Aufbau die Abscheidung von Partikeln an der Dunstabzugshaube verringert wird.The object of the present invention is therefore to provide an extractor hood in which, with a simple structure, the deposition of particles on the extractor hood is reduced.

ErfindungsgemƤƟ wird die Aufgabe daher gelƶst durch eine Dunstabzugshaube mit den Merkmalen des Anspruchs 1.According to the invention, the object is therefore achieved by an extractor hood with the features of claim 1.

Richtungsangaben, wie oben und unten beziehungsweise Oberseite und Unterseite beziehen sich, soweit nicht anders angegeben, auf eine Dunstabzugshaube mit einem horizontal in der Dunstabzugshaube angeordneten Strƶmungskanal und deren Teile.Unless otherwise stated, directional information such as top and bottom or top and bottom relate to an extractor hood with a flow channel arranged horizontally in the extractor hood and parts thereof.

Als Dunstabzugshaube wird erfindungsgemƤƟ vorzugweise eine Dunstabzugsvorrichtung bezeichnet, die im Haushalt, insbesondere in einer KĆ¼che zum Entfernen und Reinigen von KochdĆ¼nsten verwendet wird, die auch als Wrasen bezeichnet werden. Die Dunstabzugshaube stellt beispielsweise eine deckenmontierte oder eine wandmontierte Dunstabzugshaube dar. Die Dunstabzugshaube weist ein GehƤuse auf, das auch als Sichthaube bezeichnet werden kann. In der Unterseite des GehƤuses ist eine Ansaugƶffnung eingebracht.According to the invention, an extractor hood is preferably referred to as an extractor hood which can be used in the household, in particular in a kitchen, for removal and cleaning of cooking fumes, also known as vapors. The extractor hood represents, for example, a ceiling-mounted or a wall-mounted extractor hood. The extractor hood has a housing that can also be referred to as a viewing hood. There is a suction opening in the underside of the housing.

Das GehƤuse bildet im Sinne der vorliegenden Erfindung zumindest einen Teil eines Strƶmungsraumes. Vorzugsweise ist das GeblƤse der Dunstabzugshaube, welches auch als LĆ¼fter bezeichnet wird, in dem Strƶmungsraum angeordnet. Durch das GeblƤse wird ein Unterdruck erzeugt, der zum Ansaugen verunreinigter Luft, von um und insbesondere von unterhalb der Dunstabzugshaube, dient. Die verunreinigte Luft, die auch als Wrasen bezeichnet wird, kann Ć¼ber die Ansaugƶffnung, die in der Unterseite des GehƤuses angeordnet ist, in die Dunstabzugshaube eintreten.In the context of the present invention, the housing forms at least part of a flow chamber. The fan of the extractor hood, which is also referred to as a fan, is preferably arranged in the flow space. A negative pressure is generated by the blower, which is used to suck in contaminated air from around and in particular from below the extractor hood. The polluted air, also known as fumes, can enter the extractor hood through the suction opening located on the underside of the housing.

Weiterhin weist die Dunstabzugshaube zumindest ein Filterelement auf, an dem die verunreinigte Luft gereinigt werden kann. Das mindestens eine Filterelement stellt vorzugsweise ein Filterelement zum Ausfiltern von Partikeln, insbesondere von Fett-, Ɩl- oder Wasserpartikeln dar. Das Filterelement stellt vorzugsweise ein flƤchiges Element dar, dessen eine OberflƤche zumindest teilweise fĆ¼r den Einlass von verunreinigter Luft in das Filtermaterial dient. Als Filtermaterial kann erfindungsgemƤƟ beispielsweise Streckmetall zum Einsatz kommen. Bevorzugt ist das Filterelement in einem Rahmen aufgenommen. Der Rahmen kann zusƤtzlich zur Befestigung des Filterelements in der Dunstabzugshaube dienen. Das mindestens eine Filterelement ist vorzugsweise lƶsbar in der Dunstabzugshaube und insbesondere in dem GehƤuse angeordnet. Das Filterelement stellt vorzugsweise eine Filterkassette dar und wird auch als Fettfilter bezeichnet.Furthermore, the extractor hood has at least one filter element on which the contaminated air can be cleaned. The at least one filter element is preferably a filter element for filtering out particles, in particular fat, oil or water particles. The filter element is preferably a flat element, one surface of which is used at least partially for the intake of contaminated air into the filter material. According to the invention, for example, expanded metal can be used as the filter material. The filter element is preferably accommodated in a frame. The frame can also be used to attach the filter element in the extractor hood. The at least one filter element is preferably detachably arranged in the extractor hood and in particular in the housing. The filter element is preferably a filter cassette and is also referred to as a grease filter.

Weiterhin umfasst die Dunstabzugshaube eine Prallplatte. Im Sinne der vorliegenden Erfindung stellt die Prallplatte ein luftundurchlƤssiges Bauteil dar, welches vorzugsweise eine Scheibe oder Platte ist. Die Prallplatte ist in oder unterhalb der Ansaugƶffnung des GehƤuses der Dunstabzugshaube angeordnet. Die Prallplatte dient auch als Umlenkelement, das das unkontrollierte und direkte, das heiƟt unmittelbare, Anstrƶmen des mindestens einen Filterelements durch von unten zu der Dunstabzugshaube strƶmenden Wrasen, verhindert. Die Prallplatte deckt daher vorzugsweise eine FlƤche ab, die grĆ¶ĆŸer als die FlƤche des Filterelementes oder bei mehreren Filterelementen den Filterelementen ist. Die Prallplatte weist vorzugsweise aber eine GrĆ¶ĆŸe auf, die kleiner als die GrĆ¶ĆŸe der Ansaugƶffnung des GehƤuses ist. Zwischen der Unterseite des GehƤuses und dem Rand der Prallplatte wird somit ein Spalt gebildet, der auch als Randabsaugspalt oder Randabsaugbereich bezeichnet wird.Furthermore, the extractor hood includes a baffle plate. In terms of the present invention, the baffle plate represents an airtight component, which is preferably a disc or plate. The baffle plate is arranged in or below the intake opening of the hood housing. The baffle plate also serves as a deflection element, which prevents the uncontrolled and direct, ie immediate, flow of vapors flowing from below to the extractor hood onto the at least one filter element. The baffle plate therefore preferably covers an area that is larger than the area of the filter element or, in the case of a plurality of filter elements, the filter elements. However, the baffle plate preferably has a size that is smaller than the size of the suction opening of the housing. A gap is thus formed between the underside of the housing and the edge of the baffle plate, which is also referred to as the edge suction gap or edge suction area.

Das GehƤuse bildet zumindest einen Teil eines Strƶmungsraumes. Der Strƶmungsraum umfasst einen Strƶmungskanal. Im Sinne der vorliegenden Erfindung wird der Bereich der Dunstabzugshaube als Strƶmungskanal bezeichnet, der zwischen dem Randabsaugbereich und dem mindestens einen in dem GehƤuse vorgesehenen Filterelement liegt. Besonders bevorzugt wird der Strƶmungskanal durch das GehƤuse und die Prallplatte begrenzt. Das GehƤuse begrenzt dabei den Strƶmungskanal zu den Seiten und nach oben und die Prallplatte begrenzt den Strƶmungskanal nach unten. Somit bildet das GehƤuse zumindest teilweise den Strƶmungskanal des Strƶmungsraums der Dunstabzugshaube.The housing forms at least part of a flow space. The flow space includes a flow channel. For the purposes of the present invention, the area of the extractor hood is referred to as a flow channel that lies between the edge suction area and the at least one filter element provided in the housing. The flow channel is particularly preferably delimited by the housing and the baffle plate. The housing delimits the flow channel to the sides and to the top, and the baffle plate delimits the flow channel to the bottom. The housing thus at least partially forms the flow channel of the flow space of the extractor hood.

Im Strƶmungskanal wird der Wrasen innerhalb der Dunstabzugshaube und insbesondere innerhalb des GehƤuses zu dem mindestens einen Filterelement gelenkt. ErfindungsgemƤƟ umfasst der Strƶmungskanal einen Randabsaugungsbereich. Der Randabsaugungsbereich wird durch den Spalt zwischen dem GehƤuse und der Prallplatte definiert. In dem Randabsaugungsbereich kƶnnen Steg oder andere Verbindungsmittel vorgesehen sein. Der Teil des Randabsaugbereiches, der luftdurchlƤssig ist, das heiƟt, in dem beispielsweise keine Stege vorliegen, wird als Eintrittsƶffnung des Randabsaugbereiches bezeichnet. Es liegt aber auch im Rahmen der Erfindung, dass der gesamte Randabsaugbereich die Eintrittsƶffnung bildet und somit Wrasen Ć¼ber den gesamten Randabsaugbereich in das Innere der Dunstabzugshaube eintreten kann. Da der Randabsaugbereich einen Teil des Strƶmungskanals bildet, kann der Wrasen somit in den Strƶmungskanal eintreten. Vorzugsweise erstreckt sich der Strƶmungskanal von der Eintrittsƶffnung des Randabsaugungsbereiches bis zu dem mindestens einen Filterelement.In the flow channel, the vapor is directed to the at least one filter element within the extractor hood and in particular within the housing. According to the invention, the flow channel includes an edge suction area. The edge extraction area is defined by the gap between the housing and the baffle plate. A web or other connecting means can be provided in the edge extraction area. The part of the edge suction area that is permeable to air, that is, in which there are no webs, for example, is referred to as the entry opening of the edge suction area. However, it is also within the scope of the invention for the entire edge extraction area to form the entry opening, so that fumes can enter the interior of the extractor hood over the entire edge extraction area. Since the edge suction area forms part of the flow channel, the vapor can thus enter the flow channel. The flow channel preferably extends from the inlet opening of the edge suction area to the at least one filter element.

In dem Strƶmungskanal ist mindestens eine Umlenkstelle ausgebildet. Als Umlenkstelle wird eine Stelle in dem Strƶmungskanal bezeichnet, an der die Strƶmungsrichtung des Wrasen in dem Strƶmungskanal geƤndert wird. ErfindungsgemƤƟ ist die Umlenkstelle bedingt durch die Geometrie des Strƶmungskanals selbst. Die Geometrie des Strƶmungskanals hƤngt von der Geometrie des GehƤuses im Zusammenspiel mit der Prallplatte ab. Besonders bevorzugt wird als Umlenkstelle die Stelle bezeichnet, an der aufgrund der Geometrie des Strƶmungskanals die erste RichtungsƤnderung des Wrasens innerhalb des Strƶmungskanals auftritt. Weitere RichtungsƤnderungen in dem Strƶmungskanal kƶnnen beispielsweise durch den durch das GeblƤse erzeugten Unterdruck erfolgen. Diese RichtungsƤnderungen sind dabei aber nicht durch die Geometrie des Strƶmungskanals hervorgerufen und stellen somit keine Umlenkstelle im Sinne der Erfindung dar.At least one deflection point is formed in the flow channel. A point in the flow channel at which the direction of flow of the vapor in the flow channel is changed is referred to as a deflection point. According to the invention, the deflection point is determined by the geometry of the flow channel itself. The geometry of the flow channel depends on the geometry of the housing in interaction with the baffle plate. The point at which due to the Geometry of the flow channel, the first change in direction of the vapor occurs within the flow channel. Further changes in direction in the flow channel can take place, for example, as a result of the negative pressure generated by the blower. However, these changes in direction are not caused by the geometry of the flow channel and therefore do not represent a deflection point within the meaning of the invention.

ErfindungsgemƤƟ ist im Bereich mindestens einer Umlenkstelle eine Luftzufuhrƶffnung vorgesehen. Besonders bevorzugt ist die Luftzufuhrƶffnung an dem Strƶmungskanal in dem Bereich vorgesehen, der an der Umlenkstelle oder in Strƶmungsrichtung nach der Umlenkstelle liegt. An der Umlenkstelle kann eine Ecke oder eine KrĆ¼mmung des GehƤuses vorliegen, durch die die RichtungsƤnderung des Wrasenstroms bewirkt wird.According to the invention, an air supply opening is provided in the area of at least one deflection point. The air supply opening is particularly preferably provided on the flow channel in the area which is located at the deflection point or downstream of the deflection point in the direction of flow. At the deflection point, there can be a corner or a curvature of the housing, which causes the change in direction of the vapor flow.

Die Luftzufuhrƶffnung ist im Sinne der vorliegenden Erfindung eine Aussparung. Vorzugsweise ist die Luftzufuhrƶffnung ein Loch oder ein Schlitz. Die Form des Loches oder des Schlitzes kann frei gewƤhlt werden. Im Sinne der vorliegenden Erfindung kann auch mehr als eine Luftzufuhrƶffnung im Bereich der Umlenkstelle des Strƶmungskanals vorgesehen sein. ErfindungsgemƤƟ kann die Luft, welche durch die Luftzufuhrƶffnung in den Strƶmungskanal eintritt, Abluft oder Umgebungsluft sein.In the context of the present invention, the air supply opening is a recess. Preferably the air supply opening is a hole or a slit. The shape of the hole or the slot can be chosen freely. In terms of the present invention, more than one air supply opening can also be provided in the area of the deflection point of the flow channel. According to the invention, the air which enters the flow channel through the air supply opening can be exhaust air or ambient air.

Indem bei der erfindungsgemƤƟen Dunstabzugshaube, mindestens eine Luftzufuhrƶffnung im Bereich mindestens einer Umlenkstelle eines Strƶmungskanals angeordnet ist, ergeben sich eine Reihe von Vorteilen. Zum einen wird durch den Eintritt von Luft in den Strƶmungskanal der Wrasenstrom vorteilhaft beeinflusst. Durch den Eintritt der Luft im Bereich der Umlenkstelle des Strƶmungskanals wird der Wrasen effektiver als in den Vorrichtungen, die im Stand der Technik bekannt sind, umgelenkt und somit zu dem Filterelement geleitet. Des Weiteren erfasst die durch die Luftzufuhrƶffnung eingetretene Luft vorbeiziehende Partikel aus dem Wrasen und verhindert somit auch eine Ablagerung der Partikel in dem Strƶmungskanal und insbesondere an dem GehƤuse der Dunstabzugshaube. Dadurch wird das Fettlabel der Dunstabzugshaube insgesamt verbessert. Des Weiteren wird die Ablagerung von sichtbarem Fett im Ansaugbereich vermieden und somit die Kundenzufriedenheit erhƶht. Weiterhin vorteilhaft ist, dass die Bildung von Fettansammlungen in einem Bereich vermieden wird, von dem aus das Fett durch die Eintrittsƶffnung der Dunstabzugshaube nach unten auf den Herd tropfen kƶnnte.Since at least one air supply opening is arranged in the area of at least one deflection point of a flow duct in the extractor hood according to the invention, a number of advantages result. On the one hand, the vapor flow is advantageously influenced by the entry of air into the flow channel. Due to the entry of the air in the area of the deflection point of the flow channel, the vapor is deflected more effectively than in the devices that are known in the prior art and is thus guided to the filter element. Furthermore, the air that has entered through the air supply opening captures particles from the vapor passing by and thus also prevents the particles from being deposited in the flow channel and in particular on the housing of the extractor hood. This improves the grease label of the cooker hood overall. Furthermore, the deposit of visible grease in the intake area is avoided, thus increasing customer satisfaction. Another advantage is that the formation of accumulations of fat is avoided in an area from which the fat could drip down through the inlet opening of the extractor hood and onto the cooker.

GemƤƟ einer AusfĆ¼hrungsform der Dunstabzugshaube, ist die Luftzufuhrƶffnung beabstandet zu der Eintrittsƶffnung des Randabsaugungsbereichs angeordnet. Beabstandet im Sinne der vorliegenden Erfindung bedeutet, dass die Luftzufuhrƶffnung und die Eintrittsƶffnung nicht in unmittelbarer NƤhe zueinander angeordnet sind und demnach keine BerĆ¼hrungspunkte aufweisen.According to one embodiment of the extractor hood, the air supply opening is arranged at a distance from the inlet opening of the edge extraction area. Spaced within the meaning of the present invention means that the air supply opening and the inlet opening are not arranged in the immediate vicinity of one another and therefore have no points of contact.

Vorteilhaft an dieser AusfĆ¼hrungsform ist, dass hierdurch der Wrasen erst Ć¼ber die Eintrittsƶffnung in den Strƶmungskanal eintritt, bevor dieser durch die Luft, die durch die Luftzufuhrƶffnung in den Strƶmungskanal eintritt, beeinflusst wird. Somit kann dem Abstand, den der Wrasen, der durch die Eintrittsƶffnung des Randabsaugbereichs hindurch getreten ist, bis zu der Umlenkstelle im Strƶmungskanal zurĆ¼cklegt Rechnung getragen werden. Demnach ist gewƤhrleistet, dass der Wrasen erst im Bereich der Umlenkstelle durch die eingetretene Luft beeinflusst wird und nicht bereits beispielsweise beim Eintritt des Wrasen in den Strƶmungskanal.The advantage of this embodiment is that the vapor first enters the flow channel via the inlet opening before it is influenced by the air that enters the flow channel through the air supply opening. In this way, account can be taken of the distance that the vapor, which has passed through the entry opening of the edge suction area, travels to the deflection point in the flow channel. Accordingly, it is ensured that the vapor is only influenced by the air that has entered in the area of the deflection point and not already, for example, when the vapor enters the flow channel.

ErfindungsgemƤƟ umfasst der Strƶmungsraum einen Abluftkanal. Der Abluftkanal kann ein Rohr oder ein Kanal sein, der senkrecht oder parallel zu dem Strƶmungskanal liegt. Im Sinne der vorliegenden Erfindung ist der Bereich der Dunstabzugshaube als Abluftkanal bezeichnet, der sich in Strƶmungsrichtung an das Filterelement anschlieƟt. GemƤƟ einer bevorzugten AusfĆ¼hrungsform ist in dem Abluftkanal das GeblƤse der Dunstabzugshaube angeordnet. Der Abluftkanal weist eine Austrittsƶffnung auf, Ć¼ber die die Abluft nach auƟen abgegeben werden kann. Insbesondere kann die Abluft in den Raum, in dem die Dunstabzugshaube betrieben wird, oder auƟerhalb des GebƤudes in dem die Dunstabzugshaube betrieben wird, abgegeben werden. Der Abluftkanal kann zumindest teilweise durch das GehƤuse der Dunstabzugshaube gebildet werden. Alternativ kann der Abluftkanal aber auch durch ein separates Bauteil, beispielsweise ein Rohr gebildet werden, der bei einer Esse beispielsweise durch einen Kamin verkleidet sein kann.According to the invention, the flow space includes an exhaust air duct. The exhaust duct can be a pipe or duct that is perpendicular or parallel to the flow duct. For the purposes of the present invention, the area of the extractor hood is referred to as the exhaust air duct, which adjoins the filter element in the direction of flow. According to a preferred embodiment, the fan of the extractor hood is arranged in the exhaust air duct. The exhaust air duct has an outlet opening through which the exhaust air can be discharged to the outside. In particular, the exhaust air can be discharged into the room in which the extractor hood is operated or outside the building in which the extractor hood is operated. The exhaust air duct can be formed at least partially by the housing of the extractor hood. Alternatively, the exhaust air duct can also be formed by a separate component, for example a pipe, which can be covered with a fireplace, for example by a chimney.

GemƤƟ einer bevorzugten AusfĆ¼hrungsform ist die Luftzufuhrƶffnung ein Bypass zwischen dem Abluftkanal und dem Strƶmungskanal.According to a preferred embodiment, the air supply opening is a bypass between the exhaust air duct and the flow duct.

Im Sinne der vorliegenden Erfindung verbindet der Bypass den Abluftkanal strƶmungstechnisch mit dem Strƶmungskanal. Insbesondere kann Ć¼ber den Bypass ein Teil der Abluft aus dem Abluftkanal in den Strƶmungskanal geleitet werden. Da der Bypass die Luftzufuhrƶffnung bildet, wird die Abluft im Bereich der Umlenkstelle in den Strƶmungskanal eingebracht. Ein Vorteil der Verwendung der Abluft als Zuluft, die zur Verhinderung von Ablagerungen in den Strƶmungskanal eingebracht wird, besteht darin, dass die Strƶmung der Abluft durch das GeblƤse forciert wird und diese Strƶmung daher auf einfache Weise zur Zuleitung der Abluft in den Strƶmungskanal verwendet werden kann.In terms of the present invention, the bypass fluidically connects the exhaust air duct to the flow duct. In particular, part of the exhaust air can be routed from the exhaust air duct into the flow duct via the bypass. Because the bypass the air supply opening forms, the exhaust air is introduced into the flow channel in the area of the deflection point. An advantage of using the exhaust air as supply air, which is introduced into the flow duct to prevent deposits, is that the flow of exhaust air is forced by the fan and this flow can therefore be used in a simple manner to supply the exhaust air into the flow duct .

Der Bypass kann durch ein separates Bauteil, beispielsweise ein Rohr realisiert werden.The bypass can be realized by a separate component, for example a tube.

GemƤƟ einer bevorzugten AusfĆ¼hrungsform ist der Abluftkanal oberhalb des Strƶmungskanals angeordnet und zu diesem benachbart. Besonders bevorzugt verlaufen der Strƶmungskanal und der Abluftkanal zumindest bereichsweise parallel und weisen zumindest eine Kontaktstelle auf. Bei dieser AusfĆ¼hrungsform liegt zumindest ein Teil des Strƶmungskanals in der Horizontalen und der Abluftkanal liegt an dem horizontalen Teil des Strƶmungskanals an. Der Abluftkanal verlƤuft bei dieser AusfĆ¼hrungsform daher horizontal und die Austrittsƶffnung der Dunstabzugshaube ist vorzugsweise an der Seite der Dunstabzugshaube vorgesehen. Der Vorteil dieser AusfĆ¼hrungsform besteht darin, dass hierbei auf einfache Weise ein Bypass zwischen dem Abluftkanal und dem Strƶmungskanal hergestellt werden kann. Indem die beiden KanƤle zueinander benachbart sind, ist die Entfernung, die zur Zuleitung eines Teils der Abluft zu dem Wrasen in dem Strƶmungskanal Ć¼berwunden werden muss, gering.According to a preferred embodiment, the exhaust air duct is arranged above the flow duct and is adjacent to it. The flow duct and the exhaust air duct particularly preferably run parallel at least in regions and have at least one contact point. In this embodiment, at least part of the flow duct lies horizontally and the exhaust air duct lies against the horizontal part of the flow duct. In this embodiment, the exhaust air duct therefore runs horizontally and the outlet opening of the extractor hood is preferably provided on the side of the extractor hood. The advantage of this embodiment is that a bypass can be created between the exhaust air duct and the flow duct in a simple manner. Because the two ducts are adjacent to one another, the distance that has to be covered in order to supply part of the exhaust air to the vapor in the flow duct is small.

GemƤƟ einer AusfĆ¼hrungsform der Dunstabzugshaube, sind der Abluftkanal und der Strƶmungskanal durch eine Zwischenwand voneinander getrennt.According to one embodiment of the extractor hood, the exhaust air duct and the flow duct are separated from one another by a partition.

Die Zwischenwand ist ein ebenes Bauteil und stellt vorzugsweise eine Platte oder ein Blech dar. Die Zwischenwand kann gemƤƟ der vorliegenden Erfindung aus einem Blechmaterial, insbesondere aus Edelstahlblech, bestehen. Bei der AusfĆ¼hrungsform der Dunstabzugshaube, bei der der Abluftkanal und der Strƶmungskanal durch eine Zwischenwand voneinander getrennt sind, lassen sich die Vorteile der vorliegenden Erfindung besonders einfach nutzen. Der Abstand zwischen dem Abluftkanal und dem Strƶmungskanal ist bei dieser AusfĆ¼hrungsform lediglich durch die Zwischenwand gegeben. Die Zwischenwand trennt den Strƶmungsraum in zwei Bereiche auf, nƤmlich in den Abluftkanal und in den Strƶmungskanal. Hierbei bildet die Zwischenwand die Oberseite des Strƶmungskanals und die Unterseite des Abluftkanals. Der Abluftkanal wird bei dieser AusfĆ¼hrungsform nach oben durch die Oberseite des GehƤuses begrenzt. Die Zwischenwand kann Teil des GehƤuses sein oder als separates Bauteil in das GehƤuse eingebracht sein.The intermediate wall is a flat component and is preferably a plate or sheet metal. According to the present invention, the intermediate wall can consist of sheet metal material, in particular stainless steel sheet metal. In the embodiment of the extractor hood in which the exhaust air duct and the flow duct are separated from one another by an intermediate wall, the advantages of the present invention can be used particularly easily. In this embodiment, the distance between the exhaust air duct and the flow duct is only given by the intermediate wall. The partition divides the flow space into two areas, namely the exhaust air duct and the flow duct. Here, the intermediate wall forms the top of the flow duct and the bottom of the exhaust air duct. The exhaust duct is at this Embodiment limited upwards by the top of the housing. The intermediate wall can be part of the housing or can be introduced into the housing as a separate component.

In einer Variante der Erfindung ist die Luftzufuhrƶffnung in der Zwischenwand angeordnet. In dieser AusfĆ¼hrungsform dient die Luftzufuhrƶffnung als Bypass zwischen dem Abluftkanal und dem Strƶmungskanal. Beispielsweise ist die Luftzufuhrƶffnung als eine Aussparung in Form eines Loches oder Schlitzes in der Zwischenwand vorgesehen. Die Luftzufuhrƶffnung wird beispielsweise durch Stanzen oder Lasern in das Material der Zwischenwand eingebracht.In a variant of the invention, the air supply opening is arranged in the intermediate wall. In this embodiment, the air supply opening serves as a bypass between the exhaust air duct and the flow duct. For example, the air supply opening is provided as a recess in the form of a hole or slot in the intermediate wall. The air supply opening is made in the material of the intermediate wall, for example by punching or lasering.

Vorteilhaft an der Anordnung der Luftzufuhrƶffnung in der Zwischenwand ist, dass das dadurch eine definierte Verbindung zwischen dem Abluftkanal und dem Strƶmungskanal auf einfache Weise hergestellt werden kann. Beispielsweise kann die Abluft im Abluftkanal vom GeblƤse in horizontaler Richtung nach auƟen abgegeben werden und die Strƶmung des Wrasen im Strƶmungskanal kann in horizontaler Richtung zum Filterelement geleitet werden. Der Teil der Abluft, der Ć¼ber die Luftzufuhrƶffnung in den Strƶmungskanal gelangt tritt somit vorzugsweise in vertikaler Richtung durch die Luftzufuhrƶffnung in den Strƶmungskanal ein.The advantage of the arrangement of the air supply opening in the intermediate wall is that a defined connection between the exhaust air duct and the flow duct can thereby be established in a simple manner. For example, the exhaust air in the exhaust air duct can be discharged outwards in the horizontal direction by the fan and the flow of vapor in the flow duct can be directed in the horizontal direction to the filter element. The part of the exhaust air that enters the flow duct via the air supply opening thus preferably enters the flow duct in the vertical direction through the air supply opening.

Weiterhin vorteilhaft ist, dass durch die Verbindung zwischen dem Abluftkanal und Strƶmungskanal mittels einer Luftzufuhrƶffnung in einer Zwischenwand ein Teil der Abluft gezielt in den Strƶmungskanal wieder eingefĆ¼hrt werden kann und somit den Wrasen beeinflussen kann. Auf Grund der Druckunterschiede zwischen Abluftkanal und Strƶmungskanal wird der Eintritt eines Teils der Abluft in den Strƶmungskanal begĆ¼nstigt. Dieser Teil der Abluft, der als Zuluft dient, erzeugt eine Strƶmung, die im Wrasen vorbeiziehende Partikel erfassen kann und dadurch ein Abscheiden dieser Partikel an der Zwischenwand oder dem GehƤuse verhindern kann. Zumindest wird die Abscheidung von Partikeln reduziert. Dadurch wird insgesamt das Fettlabel der Dunstabzugshaube verbessert und die Reinigungsintervalle verlƤngert. Weiterhin werden weniger Partikel im sichtbaren Bereich abgeschieden und somit die Kundenzufriedenheit erhƶht. Des Weiteren wird durch die Nutzung eines Teils der Abluft die Energieeffizienz der Dunstabzugshaube erhƶht.It is also advantageous that through the connection between the exhaust air duct and the flow duct by means of an air supply opening in an intermediate wall, part of the exhaust air can be introduced back into the flow duct in a targeted manner and can thus influence the vapors. Due to the pressure differences between the exhaust air duct and the flow duct, the entry of part of the exhaust air into the flow duct is promoted. This part of the exhaust air, which serves as supply air, generates a flow that can capture particles passing by in the vapor and thus prevent these particles from being deposited on the partition wall or the housing. At least the separation of particles is reduced. This improves the grease label of the extractor hood overall and lengthens the cleaning intervals. Furthermore, fewer particles are separated in the visible range, thus increasing customer satisfaction. Furthermore, the energy efficiency of the extractor hood is increased by using part of the exhaust air.

GemƤƟ einer AusfĆ¼hrungsform der Dunstabzugshaube, ist die Luftzufuhrƶffnung als Lufthutze ausgebildet. Als Lufthutze wird eine Luftzufuhrƶffnung bezeichnet, an deren Eintrittsseite ein Luftleitelement angeordnet ist. Ɯber das Luftleitelement wird Luft aus einer Strƶmung entlang der Lufthutze gezielt zu der Luftzufuhrƶffnung gefĆ¼hrt. Indem die Luftzufuhrƶffnung eine Lufthutze darstellt, wird somit die Zufuhr von Luft zu dem Strƶmungskanal im Bereich der Umlenkstelle begĆ¼nstigt und somit die Anlagerung von Partikeln verringert oder ganz verhindert.According to one embodiment of the extractor hood, the air supply opening is designed as an air scoop. An air supply opening is referred to as an air scoop, on the inlet side of which an air guiding element is arranged. Air from a flow along the air scoop is guided in a targeted manner to the air supply opening via the air guiding element. Since the air supply opening represents an air scoop, the supply of air to the flow channel in the area of the deflection point is promoted and the accumulation of particles is thus reduced or completely prevented.

Die Lufthutze kann an einer AuƟenwand des GehƤuses vorgesehen sein und darĆ¼ber einen Teil der Umgebungsluft in den Strƶmungskanal leiten. GemƤƟ einer bevorzugten AusfĆ¼hrungsform ist die Lufthutze aber zwischen dem Abluftkanal und dem Strƶmungskanal gebildet und ist aus dem Material der Zwischenwand herausgearbeitet. Das Herausarbeiten der Lufthutze aus dem Material der Zwischenwand erfolgt beispielweise dadurch, dass in das Material der Zwischenwand, das in der Regel Blech darstellt, eine Ɩffnung oder ein Schlitz eingeschnitten, eingelasert oder gestanzt wird und anschlieƟend das Material in dem Bereich der Ɩffnung oder des Schlitzes nach oben gebogen wird. Da der Abluftkanal vorzugsweise oberhalb des Strƶmungskanals und insbesondere oberhalb der Zwischenwand liegt, ragt das nach oben gebogene Material in den Abluftkanal. Die nach oben gebogenen Bereiche des bearbeiteten Materials der Zwischenwand bilden dabei VorsprĆ¼nge aus, die eine laschenartige Form besitzen kƶnnen. Die Lasche ist dabei so ausgerichtet, dass diese entgegen der Strƶmungsrichtung der Abluft in dem Abluftkanal gerichtet ist und somit ein Teil der Abluft von der Lufthutze erfasst und in die Luftzufuhrƶffnung geleitet wird.The air scoop can be provided on an outer wall of the housing and can direct part of the ambient air into the flow channel. According to a preferred embodiment, however, the air scoop is formed between the exhaust air duct and the flow duct and is machined from the material of the intermediate wall. The air scoop is worked out of the material of the partition wall, for example, by cutting, lasering or punching an opening or a slot in the material of the partition wall, which is usually sheet metal, and then the material in the area of the opening or slot is bent upwards. Since the exhaust air duct is preferably located above the flow duct and in particular above the intermediate wall, the material bent upwards protrudes into the exhaust air duct. The areas of the processed material of the intermediate wall that are bent upwards form projections that can have a tab-like shape. The tab is aligned in such a way that it is directed against the direction of flow of the exhaust air in the exhaust air duct and thus part of the exhaust air is captured by the air scoop and guided into the air supply opening.

Vorteilhaft an dieser AusfĆ¼hrungsform ist, dass die Lufthutze auf einfache Weise hergestellt werden kann und eine zuverlƤssige Zufuhr von Abluft in den Strƶmungskanal ermƶglicht.The advantage of this embodiment is that the air scoop can be manufactured in a simple manner and enables a reliable supply of exhaust air into the flow channel.

GemƤƟ einer weiteren AusfĆ¼hrungsform der Dunstabzugshaube ist in der Zwischenwand zwischen Abluftkanal und Strƶmungskanal zumindest eines der Filterelemente aufgenommen.According to a further embodiment of the extractor hood, at least one of the filter elements is accommodated in the intermediate wall between the exhaust air duct and the flow duct.

Als aufgenommen im Sinne der vorliegenden Erfindung wird ein Filterelement bezeichnet, das von der Zwischenwand umgeben ist. Als Umgeben wird in diesem Zusammenhang verstanden, dass der ƤuƟere Rand der Zwischenwand in senkrechter Projektion auf das Filterelement auƟerhalb des Randes des flƤchigen Filterelementes liegt, das heiƟt, die FlƤche des Filterelementes ist von dem inneren Rand der Zwischenwand in senkrechter Projektion umgeben. Vorzugsweise erstreckt sich die Zwischenwand Ć¼ber die RƤnder des Filterelementes seitlich, nach vorne und hinten hinaus. Die Zwischenwand bildet somit einen flƤchigen Rahmen um das flƤchige Filterelement.A filter element that is surrounded by the intermediate wall is referred to as being received within the meaning of the present invention. As surrounded in this context understood that the outer edge of the intermediate wall in perpendicular projection onto the filter element lies outside the edge of the flat filter element, that is, the surface of the filter element is surrounded by the inner edge of the intermediate wall in perpendicular projection. Preferably, the intermediate wall extends laterally, forwardly and rearwardly beyond the edges of the filter element. The intermediate wall thus forms a flat frame around the flat filter element.

Vorteilhaft an dieser AusfĆ¼hrungsform ist, dass eine separate Filterhalterung entbehrlich ist.The advantage of this embodiment is that a separate filter holder is not required.

Es liegt aber auch im Rahmen der Erfindung das Filterelement unterhalb der Zwischenwand oder auf der Zwischenwand vorzusehen. In diesem Fall weist die Zwischenwand eine Durchlassƶffnung auf, die von dem Filterelement abgedeckt wird.However, it is also within the scope of the invention to provide the filter element below the intermediate wall or on the intermediate wall. In this case, the intermediate wall has a passage opening that is covered by the filter element.

In einer AusfĆ¼hrungsform der Dunstabzugshaube ist die Luftzufuhrƶffnung beabstandet zu dem zumindest einen Filterelement angeordnet. Vorteilhaft an dieser AusfĆ¼hrungsform ist, dass die Strƶmung, welche durch den Eintritt der Luft, durch die Luftzufuhrƶffnung in den Strƶmungskanal, erzeugt wird, den Wrasen beeinflussen kann, bevor dieser durch eines der Filterelemente durchtritt und gereinigt wird. Dadurch kann gewƤhrleistet werden, dass bei der Umlenkung der Wrasenstrƶmung im Strƶmungskanal ein Abscheiden von Partikeln an der Zwischenwand oder dem GehƤuse reduziert oder vermieden werden kann.In one embodiment of the extractor hood, the air supply opening is arranged at a distance from the at least one filter element. The advantage of this embodiment is that the flow, which is generated by the air entering through the air supply opening into the flow channel, can influence the vapor before it passes through one of the filter elements and is cleaned. In this way, it can be ensured that when the vapor flow is deflected in the flow duct, a separation of particles on the intermediate wall or the housing can be reduced or avoided.

In einer anderen Variante der erfindungsgemƤƟen Dunstabzugshaube, ist die Luftzufuhrƶffnung in einer AuƟenwand des GehƤuses angeordnet. Vorteilhaft an dieser AusfĆ¼hrungsform ist, dass die Luftzufuhrƶffnung eine Verbindung zwischen der Umgebung der Dunstabzugshaube, das heiƟt dem Raum, in dem die Dunstabzugshaube betrieben wird, und dem Strƶmungskanal herstellt. Dadurch kann Umgebungsluft angesaugt werden und durch die Luftzufuhrƶffnung in den Strƶmungskanal eintreten. Ein Vorteil dieser AusfĆ¼hrungsform besteht darin, dass die FĆ¼hrung des Abluftkanals frei gewƤhlt werden kann, da dieser nicht an dem Strƶmungskanal anliegen muss. Beispielsweise kann der Abluftkanal sich vertikal nach oben erstrecken und beispielsweise durch einen Kamin verblendet sein. Die AuƟenwand, in der die mindestens eine Luftzufuhrƶffnung eingebracht ist, kann eine oder mehrere der SeitenwƤnde des GehƤuses und/oder die Oberseite des GehƤuses sein. In jedem Fall wird die Luftzufuhrƶffnung so angeordnet, dass diese sich durch die AuƟenwand hindurch erstreckt und im Inneren des GehƤuses in dem Strƶmungskanal endet. Die Luftzufuhrƶffnung kann horizontal, vertikal oder geneigt ausgerichtet sein.In another variant of the extractor hood according to the invention, the air supply opening is arranged in an outer wall of the housing. The advantage of this embodiment is that the air supply opening establishes a connection between the area surrounding the extractor hood, ie the room in which the extractor hood is operated, and the flow duct. As a result, ambient air can be sucked in and enter the flow channel through the air supply opening. One advantage of this embodiment is that the routing of the exhaust air duct can be chosen freely, since it does not have to be in contact with the flow duct. For example, the exhaust air duct can extend vertically upwards and be screened by a chimney, for example. The outer wall in which the at least one air supply opening is introduced can be one or more of the side walls of the housing and/or the top of the housing. In any case, the air supply opening is arranged in such a way that it extends through the outer wall extends and ends inside the housing in the flow channel. The air supply opening can be aligned horizontally, vertically or at an angle.

In einer erfindungsgemƤƟen Dunstabzugshaube, ist der Strƶmungskanal an der Stelle der Luftzufuhrƶffnung verengt. Vorteilhaft an dieser AusfĆ¼hrungsform ist, dass durch die Verengung des Strƶmungskanals an der Stelle der Luftzufuhrƶffnung ein Unterdruck eingestellt wird. Durch diesen Unterdruck wird Umgebungsluft oder Abluft angesaugt und tritt in den Strƶmungskanal ein. Besonders vorteilhaft wird diese Ausgestaltung des Strƶmungskanals bei einer Dunstabzugshaube verwendet, bei der die Luftzufuhrƶffnung in einer AuƟenwand des GehƤuses eingebracht ist. Da die Umgebungsluft keine definierte Strƶmungsrichtung besitzt, kann durch den durch die Verengung beziehungsweise VerjĆ¼ngung erzeugten Unterdruck, ein Ansaugstrom aus der Umgebung erzeugt werden und somit die zuverlƤssige Zufuhr von Luft an der Umlenkstelle in dem Strƶmungskanal gewƤhrleistet werden.In an extractor hood according to the invention, the flow channel is narrowed at the point of the air supply opening. The advantage of this embodiment is that a negative pressure is set at the point of the air supply opening due to the narrowing of the flow channel. Ambient air or exhaust air is sucked in by this negative pressure and enters the flow channel. This embodiment of the flow duct is used particularly advantageously in an extractor hood in which the air supply opening is made in an outer wall of the housing. Since the ambient air does not have a defined direction of flow, the negative pressure generated by the constriction or narrowing can generate an intake flow from the environment and thus ensure the reliable supply of air at the deflection point in the flow channel.

Die Erfindung wird im Folgenden erneut unter Bezugnahme auf die beiliegenden Figuren genauer beschrieben. Es zeigen:

Fig. 1:
eine schematische Perspektivansicht eines Bereiches einer erfindungsgemƤƟen Dunstabzugshaube mit einem Strƶmungskanal und einer Luftzufuhrƶffnung gemƤƟ einer ersten AusfĆ¼hrungsform;
Fig. 2:
eine schematische Detailansicht eines Bereiches einer erfindungsgemƤƟen Dunstabzugshaube mit einem Strƶmungskanal und einer Luftzufuhrƶffnung gemƤƟ einer zweiten AusfĆ¼hrungsform;
Fig. 3:
eine schematische Perspektivansicht eines Bereiches einer erfindungsgemƤƟen Dunstabzugshaube mit einem Strƶmungskanal und einer Luftzufuhrƶffnung gemƤƟ einer dritten AusfĆ¼hrungsform;
Fig. 4:
eine schematische Perspektivansicht eines Bereiches einer Dunstabzugshaube mit einem Strƶmungskanal gemƤƟ dem Stand der Technik.
The invention is described in more detail below again with reference to the accompanying figures. Show it:
Figure 1:
a schematic perspective view of a portion of a range hood according to the invention with a flow channel and an air supply opening according to a first embodiment;
Figure 2:
a schematic detailed view of a region of a range hood according to the invention with a flow channel and an air supply opening according to a second embodiment;
Figure 3:
a schematic perspective view of a region of a range hood according to the invention with a flow channel and an air supply opening according to a third embodiment;
Figure 4:
a schematic perspective view of a region of an extractor hood with a flow channel according to the prior art.

In der Figur 1 ist ein Bereich einer erfindungsgemƤƟen Dunstabzugshaube mit einer ersten AusfĆ¼hrungsform einer Luftzufuhrƶffnung 16 in einem Strƶmungskanal 12 gezeigt. In der gezeigten Ansicht ist lediglich die linke HƤlfte des GehƤuses 1 der Dunstabzugshaube dargestellt.In the figure 1 an area of an extractor hood according to the invention with a first embodiment of an air supply opening 16 in a flow channel 12 is shown. In the view shown, only the left half of the housing 1 of the extractor hood is shown.

Die Dunstabzugshaube umfasst ein GeblƤse 13, das im Inneren des GehƤuses 1 angeordnet ist. In der Unterseite des GehƤuses 1 ist eine Ansaugƶffnung vorgesehen. Diese Ansaugƶffnung wird im mittleren Bereich durch eine Prallplatte 15 abgedeckt. Zwischen der Prallplatte 15 und der Seitenwand des GehƤuses 1 wird dadurch ein Randabsaugbereich gebildet, der eine Eintrittsƶffnung 121 aufweist, die sich vorzugsweise Ć¼ber den gesamten Randabsaugbereich erstreckt. Im Inneren des GehƤuses 1 und oberhalb der Prallplatte 15 ist in der gezeigten AusfĆ¼hrungsform eine Zwischenwand 14 in dem GehƤuse 1 vorgesehen. Die Zwischenwand 14 kann als Teil des GehƤuses 1 ausgebildet sein, das heiƟt mit dem GehƤuse 1 einteilig ausgestaltet sein. Es liegt aber auch im Rahmen der Erfindung, dass die Zwischenwand 14 ein separates Bauteil darstellt, das in dem GehƤuse 1 befestigt wird. Die Zwischenwand 14 liegt parallel zu der Prallplatte 15. Im mittleren Bereich der Zwischenwand 14 ist in der dargestellten AusfĆ¼hrungsform unterhalb des GeblƤses 13 ein Filterelement 140 aufgenommen. Im ƤuƟeren Bereich der Zwischenwand 14 ist eine Luftzufuhrƶffnung 16 eingebracht. Im oberen Bereich der Seitenwand des GehƤuses 1 ist eine Austrittsƶffnung 17 eingebracht.The extractor hood includes a fan 13 which is arranged inside the housing 1 . A suction opening is provided in the underside of the housing 1 . This suction opening is covered by a baffle plate 15 in the middle area. As a result, a rim suction area is formed between the baffle plate 15 and the side wall of the housing 1, which has an inlet opening 121, which preferably extends over the entire rim suction area. In the embodiment shown, an intermediate wall 14 is provided in the housing 1 inside the housing 1 and above the baffle plate 15 . The intermediate wall 14 can be designed as part of the housing 1, ie it can be designed in one piece with the housing 1. However, it is also within the scope of the invention for the intermediate wall 14 to be a separate component which is fastened in the housing 1 . The intermediate wall 14 lies parallel to the baffle plate 15. In the illustrated embodiment, a filter element 140 is accommodated below the fan 13 in the central area of the intermediate wall 14. FIG. An air supply opening 16 is introduced in the outer area of the intermediate wall 14 . In the upper area of the side wall of the housing 1 there is an outlet opening 17 .

In der Dunstabzugshaube und in der dargestellten AusfĆ¼hrungsform ist in dem GehƤuse 1 ein Strƶmungsraum 10 gebildet. Der Strƶmungsraum 10 umfasst einen Abluftkanal 11 und einen Strƶmungskanal 12. Der Abluftkanal 11 wird nach unten durch die Zwischenwand 14 und nach oben durch die Oberseite des GehƤuses 1 begrenzt. Der Strƶmungskanal 12 ist nach oben durch die Zwischenwand 14 und nach unten durch die Prallplatte 15 begrenzt. Zu den Seiten ist der Strƶmungskanal durch die Seitenwand des GehƤuses 1 begrenzt. Die Zwischenwand 14 trennt in der dargestellten AusfĆ¼hrungsform den Abluftkanal 11 von dem Strƶmungskanal 12. Der Abluftkanal 11 erstreckt sich von dem Filterelement 140 zu der Austrittsƶffnung 17 und der Strƶmungskanal von der Eintrittsƶffnung 121 des Randabsaugbereiches zu dem Filterelement 140.A flow space 10 is formed in the housing 1 in the extractor hood and in the illustrated embodiment. The flow space 10 comprises an exhaust air duct 11 and a flow duct 12. The exhaust air duct 11 is bounded at the bottom by the intermediate wall 14 and at the top by the upper side of the housing 1. The flow channel 12 is delimited at the top by the intermediate wall 14 and at the bottom by the baffle plate 15 . The flow channel is delimited on the sides by the side wall of the housing 1 . In the embodiment shown, the partition 14 separates the exhaust air duct 11 from the flow duct 12. The exhaust air duct 11 extends from the filter element 140 to the outlet opening 17 and the flow duct from the inlet opening 121 of the edge suction area to the filter element 140.

In der dargestellten AusfĆ¼hrungsform ist das GeblƤse 13 im Abluftkanal 11 angeordnet. Ɯber das GeblƤse 13 wird in dem Strƶmungskanal 12 ein Unterdruck erzeugt, der zum Ansaugen verunreinigter Luft, die auch als Wrasen W bezeichnet wird, von um und insbesondere von unterhalb der Dunstabzugshaube dient. Durch die Prallplatte 15 wird ein direktes Anstrƶmen des Filterelementes 140 in der Dunstabzugshaube durch Wrasen vermieden. Der Wrasen W wird vielmehr entlang der Unterseite der Prallplatte 15 zu der Eintrittsƶffnung 121 des Randabsaugungsbereichs des Strƶmungskanals 12 geleitet. Der eingetretene Wrasen W wird durch den Strƶmungskanal 12 bis zu einem Filterelement 140 geleitet, durch das er hindurch tritt und gereinigt wird. In der dargestellten AusfĆ¼hrungsform wird nach Durchtritt und Reinigung an dem zumindest einen Filterelement 140 die Abluft A, aufgrund der durch das GeblƤses 13 eingestellten Strƶmung in horizontaler Richtung, durch die Austrittsƶffnung 17 nach auƟen abgegeben.In the embodiment shown, the fan 13 is arranged in the exhaust air duct 11 . About the fan 13, a negative pressure is generated in the flow channel 12, the Suction of contaminated air, which is also referred to as fumes W, is used from around and in particular from below the extractor hood. The baffle plate 15 prevents vapors from flowing directly against the filter element 140 in the extractor hood. Rather, the vapor W is conducted along the underside of the baffle plate 15 to the inlet opening 121 of the edge suction area of the flow channel 12 . The vapor W that has entered is guided through the flow channel 12 to a filter element 140, through which it passes and is cleaned. In the embodiment shown, after passing through and cleaning the at least one filter element 140 , the exhaust air A is discharged to the outside through the outlet opening 17 due to the flow in the horizontal direction set by the blower 13 .

Der Strƶmungskanal 12 weist eine Umlenkstelle 120 auf, an der die Strƶmungsrichtung des Wrasen W geƤndert wird. Die Umlenkstelle 120 ist ein Bereich des Strƶmungskanals 12, an dem aufgrund der Geometrie des Strƶmungskanals 12 eine RichtungsƤnderung der in dem Strƶmungskanal 12 strƶmenden Wrasens W erfolgt. Die Geometrie des Strƶmungskanals 12 wird durch das Zusammenspiel des GehƤuses 1 und in der dargestellten AusfĆ¼hrungsform der Zwischenwand 14 mit der Prallplatte 15 definiert.The flow channel 12 has a deflection point 120 at which the direction of flow of the vapor W is changed. The deflection point 120 is a region of the flow channel 12 at which, due to the geometry of the flow channel 12 , the vapor W flowing in the flow channel 12 changes direction. The geometry of the flow channel 12 is defined by the interaction of the housing 1 and, in the embodiment shown, the intermediate wall 14 with the baffle plate 15 .

In der dargestellten AusfĆ¼hrungsform ist gezeigt, dass an der Umlenkstelle 120 des Strƶmungskanals 12 eine Luftzufuhrƶffnung 16 in Form eines Bypasses 160 angeordnet ist. In dieser AusfĆ¼hrungsform ist der Bypass 160 als eine Auspaarung in der Zwischenwand 14 ausgestaltet. Der Bypass 160 stellt somit eine Verbindung zwischen dem Abluftkanal 11 und dem Strƶmungskanal 12 her. Durch diesen Bypass 16 kann gezielt ein Teil der Abluft A in den Strƶmungskanal 12 eintreten. Durch die Strƶmung, die durch den Teil der Abluft A in dem Strƶmungskanal 12 erzeugt wird, kƶnnen vorbeiziehende Partikel im Wrasen W erfasst werden und somit verhindert oder zumindest reduziert werden, dass Partikel an der Zwischenwand 14 abgeschieden werden.The embodiment shown shows that an air supply opening 16 in the form of a bypass 160 is arranged at the deflection point 120 of the flow channel 12 . In this embodiment, the bypass 160 is designed as a recess in the intermediate wall 14 . The bypass 160 thus establishes a connection between the exhaust air duct 11 and the flow duct 12 . Part of the exhaust air A can enter the flow channel 12 in a targeted manner through this bypass 16 . The flow that is generated by the part of the exhaust air A in the flow channel 12 can capture passing particles in the vapor W and thus prevent or at least reduce particles being deposited on the intermediate wall 14 .

Figur 2 zeigt einen Bereich einer erfindungsgemƤƟen Dunstabzugshaube mit einer zweiten AusfĆ¼hrungsform einer Luftzufuhrƶffnung. figure 2 shows an area of an extractor hood according to the invention with a second embodiment of an air supply opening.

In der dargestellten Ansicht sind einige Komponenten der erfindungsgemƤƟen Dunstabzugshaube nur teilweise dargestellt beziehungsweise angedeutet. Der Aufbau der Dunstabzugshaube nach Figur 2 entspricht dem der AusfĆ¼hrungsform nach Figur 1 und wird daher nicht erneut erlƤutert. Der einzige Unterschied zwischen den AusfĆ¼hrungsformen der Figur 1 und der Figur 2 besteht in der Ausgestaltung der Luftzufuhrƶffnung 16. Im Unterschied zur Figur 1, ist in der AusfĆ¼hrungsform der Figur 2 der Bypass als Lufthutze 1600 ausgebildet. Die Lufthutze 1600 ist aus dem Material der Zwischenwand 14 herausgearbeitet. Wie in Figur 2 dargestellt, wird in die Zwischenwand 14 eine Ɩffnung derart eingeschnitten, dass ein Teil des Materials in der Ɩffnung nach oben gebogen werden kann. Der nach oben gebogene Teil des Materials der Zwischenwand 14 ragt in den Abluftkanal 11 hinein.In the view shown, some components of the extractor hood according to the invention are only partially shown or indicated. The construction of the extractor hood figure 2 corresponds to that of the embodiment figure 1 and will therefore not explained again. The only difference between the embodiments of figure 1 and the figure 2 consists in the design of the air supply opening 16. In contrast to figure 1 , is in the embodiment of figure 2 the bypass is designed as an air scoop 1600. The air scoop 1600 is machined from the material of the intermediate wall 14 . As in figure 2 As shown, an opening is cut in the baffle 14 such that a portion of the material in the opening can be bent upwards. The part of the material of the intermediate wall 14 which is bent upwards protrudes into the exhaust air duct 11 .

Wie in Figur 2 dargestellt, definiert das nach oben gebogene Material der Zwischenwand 14 eine Art Umlenkelement im Abluftkanal 11. Somit wird durch die Lufthutze 1600 teilweise die Abluft A gezielt in den Strƶmungskanal 12 geleitet. Des Weiteren wird durch den Druckunterschied eine Strƶmung der Abluft A, die in den Strƶmungskanal 12 eintritt, begĆ¼nstigt.As in figure 2 shown, the upwardly bent material of the intermediate wall 14 defines a type of deflection element in the exhaust air duct 11. Thus, the exhaust air A is partially directed through the air scoop 1600 into the flow duct 12 in a targeted manner. Furthermore, a flow of the exhaust air A, which enters the flow channel 12, is favored by the pressure difference.

In der Figur 3 wird ein Bereich einer erfindungsgemƤƟen Dunstabzugshaube mit einer dritten AusfĆ¼hrungsform einer Luftzufuhrƶffnung dargestellt.In the figure 3 an area of an extractor hood according to the invention is shown with a third embodiment of an air supply opening.

Figur 3 zeigt im allgemeinen Aufbau dieselben Komponenten wie Figur 1 und diese werden daher nicht erneut erlƤutert. figure 3 shows the same components as in general figure 1 and therefore will not be explained again.

Im Unterschied zur AusfĆ¼hrungsform der Figur 1, ist in der AusfĆ¼hrungsform nach Figur 3 die Luftzufuhrƶffnung 16 nicht in der Zwischenwand 14 sondern in einer AuƟenwand des GehƤuses 1 der Dunstabzugshaube angeordnet. Dadurch kann Umgebungsluft U in den Strƶmungskanal 12 eintreten. Des Weiteren ist der Strƶmungskanal 12 in der dargestellten Ansicht an der Stelle der Luftzufuhrƶffnung 16 verengt.In contrast to the embodiment of figure 1 , is in the embodiment after figure 3 the air supply opening 16 is not arranged in the intermediate wall 14 but in an outer wall of the housing 1 of the extractor hood. As a result, ambient air U can enter the flow channel 12 . Furthermore, the flow channel 12 is narrowed at the location of the air supply opening 16 in the view shown.

Im Unterschied zu den AusfĆ¼hrungsformen nach Figur 1 und Figur 2, stellt diese AusfĆ¼hrungsform eine passive Variante dar. Durch die Verengung des Strƶmungskanals 12 in der dargestellten AusfĆ¼hrungsform stellt sich ein Unterdruck ein, der die Umgebungsluft U anzieht. Dadurch tritt die Umgebungsluft U in den Strƶmungskanal 12 ein und kann Partikel im Wrasen W erfassen, wodurch diese nicht oder vermindert an der Zwischenwand 14 oder dem GehƤuse 1 abgeschieden werden.In contrast to the embodiments according to Figure 1 and Figure 2 , this embodiment represents a passive variant. Due to the narrowing of the flow channel 12 in the embodiment shown, a negative pressure is established, which draws in the ambient air U. As a result, the ambient air U enters the flow channel 12 and can capture particles in the vapor W, as a result of which these are not deposited on the intermediate wall 14 or the housing 1 or are deposited to a lesser extent.

Figur 4 zeigt einen Strƶmungskanal 12 einer Dunstabzugshaube gemƤƟ dem Stand der Technik. figure 4 shows a flow channel 12 of an extractor hood according to the prior art.

Diese Darstellung zeigt, dass der Strƶmungskanal 12 bei Dunstabzugshauben im Stand der Technik durch ein GehƤuse 1 und eine Prallplatte 15 begrenzt wird. Des Weiteren zeigt die Figur 4, dass der Wrasen W durch die Eintrittsƶffnung 121 des Randabsaugungsbereichs des Strƶmungskanals 12 eintritt. Der Wrasen W wird im Strƶmungskanal 12 umgelenkt, wodurch die Strƶmungsrichtung des Wrasen W geƤndert wird.This representation shows that the flow duct 12 is delimited by a housing 1 and a baffle plate 15 in extractor hoods in the prior art. Furthermore, the figure 4 that the vapor W enters through the inlet opening 121 of the edge suction area of the flow channel 12 . The vapor W is deflected in the flow channel 12, whereby the direction of flow of the vapor W is changed.

Wie in der Figur 4 gezeigt, wird in den Ansaugspaltkonstruktionen gemƤƟ dem Stand der Technik eine Umlenkung des Wrasen W um 90Ā° umgesetzt. Durch die hohe Geschwindigkeit und die Umlenkung des Wrasen kommt es zur Partikelabscheidung P an der Dunstabzugshaube selbst, beispielsweise am GehƤuse 1. Nachteilig ist, dass dadurch zum einen der Fettlabel der Dunstabzugshaube verstƤrkt wird und die Reinigungsintervalle verkĆ¼rzt werden und zum anderen, dass die Abscheidungen oft fĆ¼r den Kunden sichtbar sind und daher die Dunstabzugshauben auch an Ƥsthetischer Wirkung verlieren.Like in the figure 4 shown, a deflection of the vapor W by 90Ā° is implemented in the suction gap constructions according to the prior art. Due to the high speed and the deflection of the fumes, particles P are deposited on the extractor hood itself, for example on housing 1. The disadvantage is that this increases the grease label of the extractor hood and shortens the cleaning intervals, and on the other hand that the deposits often are visible to the customer and therefore the hoods also lose their aesthetic appeal.

BezugszeichenReference sign

11
GehƤusehousing
1010
Strƶmungsraumflow space
1111
Abluftkanalexhaust duct
1212
Strƶmungskanalflow channel
120120
Umlenkstelledeflection point
121121
Eintrittsƶffnungentry opening
1313
GeblƤsefan
1414
Zwischenwandpartition
140140
Filterelementfilter element
1515
Prallplatteflapper
1616
Luftzufuhrƶffnungair supply opening
160160
Bypassbypass
16001600
Lufthutzeair scoop
1717
Austrittsƶffnungexit port
AA
Abluftexhaust air
PP
Partikelabscheidungparticle separation
Uu
Umgebungsluftambient air
WW
Wrasenvapors

Claims (8)

  1. Extractor hood comprising a blower (13), at least one filter element (140), a baffle plate (15) and a housing (1), which forms at least part of a flow space (10), which comprises a flow duct (12) with an edge suction region that has at least one entry opening (121), wherein at least one air supply opening (16) is arranged in the region of at least one deflection point (120) of the flow duct (12) and
    the flow space (10) comprises an exhaust duct (11), in which the blower (13) is arranged, and characterised in that
    the exhaust duct (11) and the flow duct (12) are separated from one another by a partition (14) and the air supply opening (16) is arranged in the partition (14) or
    the air supply opening (16) is introduced into an outer wall of the housing (1) and the flow duct (12) is narrowed at the point of the air supply opening (16).
  2. Extractor hood according to claim 1, characterised in that the air supply opening (16) is arranged at a distance from the entry opening (121) of the edge suction region.
  3. Extractor hood according to claim 1 or 2, characterised in that the exhaust duct (11) is arranged above the flow duct (12), adjacent thereto.
  4. Extractor hood according to one of claims 1 to 3, provided the air supply opening (16) is arranged in the partition (14), characterised in that at least one of the filter elements (140) is accommodated in the partition (14).
  5. Extractor hood according to one of claims 1 to 4, characterised in that the air supply opening (16) is arranged at a distance from the at least one filter element (140).
  6. Extractor hood according to one of claims 1 to 5, characterised in that the air supply opening (16) is a bypass (160) between the exhaust duct (11) and the flow duct (12).
  7. Extractor hood according to one of claims 1 to 6, characterised in that the air supply opening (16) is embodied as an air scoop (1600).
  8. Extractor hood according to claim 7, provided the air supply opening (16) is arranged in the partition (14), characterised in that the air scoop (1600) is formed between exhaust duct (11) and flow duct (12) and is formed from the material of the partition (14).
EP18700571.5A 2017-01-26 2018-01-15 Extractor hood Active EP3574265B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18700571T PL3574265T3 (en) 2017-01-26 2018-01-15 Extractor hood

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017201256.0A DE102017201256A1 (en) 2017-01-26 2017-01-26 Hood
PCT/EP2018/050855 WO2018137956A1 (en) 2017-01-26 2018-01-15 Extractor hood

Publications (2)

Publication Number Publication Date
EP3574265A1 EP3574265A1 (en) 2019-12-04
EP3574265B1 true EP3574265B1 (en) 2022-03-23

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EP18700571.5A Active EP3574265B1 (en) 2017-01-26 2018-01-15 Extractor hood

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EP (1) EP3574265B1 (en)
CN (1) CN110199157A (en)
DE (1) DE102017201256A1 (en)
PL (1) PL3574265T3 (en)
WO (1) WO2018137956A1 (en)

Families Citing this family (1)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
CN113739233B (en) * 2021-09-13 2023-07-14 ęµ™ę±Ÿę„ē±³ē‰¹ē”µå™Øęœ‰é™å…¬åø Fume purifying integrated machine

Citations (4)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005098618A (en) * 2003-09-25 2005-04-14 Fuji Industrial Co Ltd Range hood for ih cooking heater
JP2005214584A (en) * 2004-02-02 2005-08-11 Fuji Industrial Co Ltd Range hood for ih cooking heater
EP1757870A2 (en) * 2005-08-22 2007-02-28 LG Electronics Inc. Exhaust hood
EP2772695A2 (en) * 2014-06-27 2014-09-03 V-Zug AG Extractor hood

Family Cites Families (1)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015210066A (en) * 2014-04-30 2015-11-24 ę Ŗ式会ē¤¾ļ¼¬ļ½‰ļ½˜ļ½‰ļ½Œ Exhaust system

Patent Citations (4)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005098618A (en) * 2003-09-25 2005-04-14 Fuji Industrial Co Ltd Range hood for ih cooking heater
JP2005214584A (en) * 2004-02-02 2005-08-11 Fuji Industrial Co Ltd Range hood for ih cooking heater
EP1757870A2 (en) * 2005-08-22 2007-02-28 LG Electronics Inc. Exhaust hood
EP2772695A2 (en) * 2014-06-27 2014-09-03 V-Zug AG Extractor hood

Also Published As

Publication number Publication date
CN110199157A (en) 2019-09-03
DE102017201256A1 (en) 2018-07-26
WO2018137956A1 (en) 2018-08-02
PL3574265T3 (en) 2022-07-11
EP3574265A1 (en) 2019-12-04

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