EP2677242B1 - Device for extraction of air - Google Patents
Device for extraction of air Download PDFInfo
- Publication number
- EP2677242B1 EP2677242B1 EP13003133.9A EP13003133A EP2677242B1 EP 2677242 B1 EP2677242 B1 EP 2677242B1 EP 13003133 A EP13003133 A EP 13003133A EP 2677242 B1 EP2677242 B1 EP 2677242B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust air
- partial surface
- flow
- air duct
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000605 extraction Methods 0.000 title 1
- 239000012530 fluid Substances 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000010411 cooking Methods 0.000 description 13
- 230000000630 rising effect Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 210000001061 forehead Anatomy 0.000 description 9
- 235000019645 odor Nutrition 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000013641 positive control Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGESĀ ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2028—Removing cooking fumes using an air curtain
Definitions
- the invention relates to a device for discharging air.
- Such devices for discharging air are used in particular in kitchens in order to extract and dissipate the cooking fumes generated over a hotplate or a stove, to clean them if necessary (e.g. to filter them) and to return them to the room.
- extractor hoods When used in kitchens, there are so-called extractor hoods.
- Cooker hoods can be divided into two groups, depending on the type of air duct.
- exhaust hoods the exhaust air is routed to the outside via a pipeline and is thus extracted from the room with the hotplate and exhaust hood and released into the atmosphere outside the building.
- Grease separation is usually also provided for exhaust hoods.
- Conventional extractor hoods of both groups generally have a separating device for separating the dirt particles and a fan or blower device for generating an air flow and for removing the exhaust air.
- the dirt particles can be separated by means of separation elements and / or a suitable guidance of the air flow.
- the separator removes almost all solid particles, such as fat and dirt particles, from the exhaust air before the exhaust air enters the fan unit.
- the exhaust air or the vapors is taken into the extractor hood via an inlet opening in a suction area thereof.
- the entire area facing the exhaust air source is referred to here as the suction area.
- the inlet opening is located near the forehead area, a free side of the extractor hood being defined as the forehead area, which does not adjoin a wall of the room and to which, for example, control elements are attached, which can be reached by a person cooking on the end face.
- the invention has for its object a device for discharging air in which condensate formation in the suction area is restricted or avoided.
- at least one second outlet opening which is either in the center of the suction area or near one - the at least one free end area opposite - side wall provided, the at least one second outlet opening is also designed such that an emerging fluid stream sweeps over the suction area and can be sucked in through the at least one slot-shaped inlet opening.
- the invention is therefore applicable on the one hand to wall hoods with an end region and an inlet opening.
- these wall hoods have a second outlet opening, which is provided in the suction area near a side wall - opposite the free end area - the second outlet opening being designed such that an emerging fluid flow sweeps over the suction area and through the slit-shaped inlet opening is suckable.
- the invention is also applicable to island hoods with at least two end areas and at least two inlet openings.
- these island hoods have a plurality of second outlet openings which are provided in the center of the suction area, the plurality of second outlet openings being designed in such a way that the emerging fluid streams sweep over the suction area and can be sucked in through the plurality of slot-shaped inlet openings.
- the at least one fluid stream forms a layer under the suction area and in this way prevents rising damp exhaust air from coming into direct contact with the suction area. At the same time, the rising exhaust air is deflected and moved with the fluid flow in the direction of the inlet opening. This prevents moisture from falling out. If, in rare cases, small water droplets do form, they are evaporated again by the fluid flow and the suction area is dried again.
- the at least one inlet opening is therefore slit-shaped, runs parallel to the at least one free forehead area and extends almost over the entire width of the at least one free forehead area.
- the fluid flow should prevent the exhaust air from coming into direct contact with the intake area, on the other hand, however, it must not accelerate the exhaust air that is carried along so that it is pushed beyond the inlet opening and therefore can no longer be extracted through it.
- the fluid flow emerging from the at least one second outlet opening is therefore dimensioned according to the invention such that the fluid flow is between 2% and 10%, in particular between 3% and 5%, of the volume flow of the sucked-in exhaust air in the blow-off duct.
- the exact ratio between the volume flow of the intake air and the fluid flow depends on the design of the exhaust hood, e.g. B. size of the suction area, inclination of the suction area, guiding the partial flow before exiting the second outlet opening, dimensioning of the second outlet opening, etc.
- the fluid flow can be generated by its own fan, which either draws air from the outside of the building or air from the room. In both cases, the expenditure on equipment is relatively high. It is therefore advantageous in the flow direction after the fan device to provide a sub-device for dividing the volume flow of the intake air. In this way, a good result can also be achieved without an additional fan. Furthermore, an automatic adjustment of the fluid flow to the volume flow of the sucked-in exhaust air can be realized without additional control effort.
- At least one first exhaust air duct for guiding a first partial flow of the sucked-in exhaust air and at least one second exhaust air duct for guiding a second partial flow of the sucked-in exhaust air are provided, the first partial stream and the second partial stream being separable from one another by means of a separating element.
- the separating element can be designed, for example, as a simple separating plate on the blow-off side of the fan device.
- the first partial flow of the sucked-in exhaust air, the actual main flow can then be fed to the first outlet opening, from which it either leads to the outside of the building or is returned to the room via an odor filter, in most cases an activated carbon filter.
- the second exhaust air duct deflects the partial flow and leads it to the at least one second outlet opening.
- the deflection should take place in such a way that as little flow energy as possible is destroyed. A deflection of approximately 180 Ā° is necessary directly after the fan device. Before the second exhaust air duct opens into a second outlet opening, a further deflection must take place, which ensures that the fluid flow is not directed vertically downwards, but rather sweeps over the suction area.
- the entire suction area should be covered by the fluid flow if possible.
- the at least one second outlet opening is therefore formed in the form of a gap.
- the second outlet opening advantageously runs parallel to the suction opening and has approximately the same length. As a result, the entire fluid stream emerging from the second outlet opening can be received by the suction opening.
- the fluid flow is intended to capture all of the rising exhaust air laden with moisture.
- the gap of the at least one second outlet opening therefore extends parallel to the side wall - opposite the at least one free end region. If the device is designed as a wall hood, the distance of the gap to the wall to which the device is attached should be as small as possible.
- the width of the gap must be dimensioned so that the available volume flow in the second exhaust air duct generates a fluid stream below the intake area, the speed of which is high enough to guide the rising exhaust air to the intake opening without passing it past the intake opening to press.
- the width of the gap is between 2 and 5 mm. It mainly depends on the volume flow in the second exhaust air duct.
- the suction area advantageously has at least two partial surfaces which together form an obtuse angle.
- This allows the edge in the forehead area of an extractor hood to be pulled upwards, so that this edge protruding into the room does not hinder the headroom of a person cooking.
- the part of the suction area of these headroom hoods directed towards the forehead area is consequently not only the exhaust air source but also also facing the boiling person, the perpendicular pointing to this partial area between the exhaust air source and the boiling person.
- special care must be taken to ensure that no condensate forms at the intake area. Condensed water would run down the sloping surface and collect at the connecting edge of the two partial surfaces. Since this connecting edge is a drip edge, the risk of water drops loosening is particularly high at this point.
- the fluid flow in these headroom hoods must therefore be particularly well matched to the design.
- the so-called island hoods are used above standing cooking islands that are accessible from at least two sides. These extractor hoods therefore also have two opposite end areas.
- a slot-shaped inlet opening and two second outlet openings are provided on two opposite sides of the intake area and centrally between the two slot-shaped inlet openings.
- the suction area advantageously has three partial surfaces, the outer partial surfaces each forming an obtuse angle with the central partial surface and the inlet openings in the outer partial surfaces and the second outlet openings in the central partial surface.
- Fig. 1 shows an embodiment of a device 1 according to the invention for discharging air, in particular exhaust air 5, from an exhaust air source (here a saucepan 6).
- the device 1 can be provided as an extractor hood, for example as an exhaust hood or a recirculation hood.
- an exhaust hood is shown that has no odor filter. Since the extractor hood 1 has only one end region 21 and is attached with its rear wall 3 to a room boundary wall 4, this is a so-called wall hood.
- the device 1 designed as an extractor hood comprises a housing 2 with an end region 21, a side wall (rear wall 3) opposite the end region and a suction region 20.
- the complete underside of the extractor hood 1, which faces the exhaust air source 6, is referred to as the suction region 20, the Exhaust source 6 e.g. stands on a hob or stove (not shown here).
- the suction region 20 in this embodiment has two partial surfaces 20a and 20b which are at an angle to one another, the partial surface 20a being oriented horizontally.
- the partial surface 20b is arranged such that the edge which is furthest into the space in front of the extractor hood is at the greatest possible height. This measure creates a so-called headroom hood, in which a cooking person does not collide with the suction area 20 and has an unobstructed view of the exhaust air source, that is to say the cooking pot 6.
- a slit-shaped inlet opening 30 is provided in the suction area 20 of the extractor hood 1, so that the air or exhaust air 6 provided for discharge can be sucked in.
- the inlet opening 30 runs parallel and at a short distance from the edge of the partial surface 20b of the suction area which projects furthest into the space. This arrangement ensures that all vapors emanating from the cooking pot 6 can also be captured and do not flow past the suction area 20 into the room.
- a separating device 40 designed with positive guidance means (see Fig. 4 ) arranged, which serves to separate suspended particles from the exhaust air.
- the exhaust air flow is directed through the positive control means in such a way that the exhaust air flow is strongly deflected.
- the mass particles e.g. B. condensed water droplets, dirt particles or fat particles pressed out and settle on the positive control means.
- the cleaned exhaust air flow continues to flow in the direction of the fan device 50. After passing through the separating device 40, the exhaust air flow sucked in hardly has any suspended particles, so that the fan device 50 only comes into contact with very little contaminated exhaust air and therefore cannot become dirty.
- the fan device 50 builds up a negative pressure in the exhaust air delivery channel, which draws the cleaned exhaust air from the separating device 40.
- the blow-off duct 61 is provided downstream of the fan device 50. This guides the entire intake air and forms the volume flow L.
- the exemplary embodiment shown is an exhaust hood, in which the exhaust air conveyed by the fan device 50 is passed to the outside of the building without a filter, there is hardly any pressure increase after the fan device 50, by means of which the volume flow L could be separated into two partial flows.
- a separating element 70 is therefore provided, which divides the blow-off duct 71. In this exemplary embodiment, the separation is consequently achieved via the flow of the volume flow L.
- the separating element 70 is aligned parallel to the flow direction of the volume flow L and divides the blow-off duct 61 at its upper end in such a way that a first exhaust air duct 62 and a second exhaust air duct 63 are created.
- the first exhaust air duct 62 leads to a first outlet opening 31, while the second exhaust air duct 63 leads to a second outlet opening 32.
- the separating element 70 is arranged such that the first exhaust air duct is charged with approximately 97% of the volume flow L and the second exhaust air duct 63 with approximately 3% volume flow L.
- the resulting primary flow L1 in the exhaust air duct 62 thus behaves approximately to 32: 1 with the resulting secondary flow L2 in the second exhaust air duct 63.
- This ratio ensures that the fluid flow F2 emerging from the second outlet opening 32 forms a kind of barrier layer under the suction area 20, which prevents the rising exhaust air 5 from coming into direct contact with the suction area 20. It is therefore also impossible for any moisture emerging from the rising vapors to condense on the suction region 20 and, for example, to drip into the pot underneath. At the same time, however, this ratio also prevents the fluid flow F2 from being so strong that it drives beyond the inlet opening and the rising exhaust air 5 in the front region 21 leads past the extractor hood 1.
- the first outlet opening 31 is formed by the exhaust port 33.
- a hose can be attached that leads directly into the open via a wall opening.
- the second outlet opening 32 is provided on the underside of the extractor hood 1 in the suction area 20 facing the exhaust air source 6.
- the fluid flow F2 emerges from the housing 2 of the extractor hood 1 via the second outlet opening 32.
- the second outlet opening 32 forms a slot which is arranged parallel to the inlet opening 30 and runs close to the rear wall 3.
- the slot is designed such that the exiting fluid flow F2 is inclined at approximately 15 Ā° with respect to the horizontal. The emerging fluid flow F2 thus sweeps over the entire width of the suction area and is completely sucked off again through the likewise slit-shaped inlet opening 30.
- the separating element 70 is provided here as an angled element, so that the secondary flow L2 divided by the volume flow L is directed out of the fan device 50 into the second exhaust air duct 63.
- An angle of approximately 45 Ā° is preferably provided here (see Fig. 3 ), so that the secondary current L2 does not hit a wall perpendicular to the direction of flow.
- the second exhaust air duct 63 runs between the rear wall 3 of the extractor hood 1 and a wall of the housing of the fan device 50, or it is formed by these walls and the side walls of the extractor hood 1 that are not visible in the sectional view.
- the cross section of the first exhaust air duct 62 is larger than the cross section of the second exhaust air duct 63, since the majority of the volume flow L is actually to be blown out via the first outlet opening 31, while only a small part is to be blown out of the second outlet opening 32.
- the fluid stream F2 is relatively dry and can even absorb moisture again. This is particularly important if the extractor hood was only switched on after the start of cooking and water drops have already formed on its suction area 20. These drops of water are then slowly broken down again by the fluid flow F2, so that even drying of the suction region 20 becomes possible.
- Fig. 2 shows the division of the volume flow L into the primary flow L1 and the secondary flow L2 from the exemplary embodiment Fig. 1 in detail.
- the separating element 70 can be clearly seen here, which is arranged in such a way that the secondary flow L2 is also separated without back pressure, since the separating element plunges into the volume flow L in parallel. Only in the upper region is the separating element 70 angled, so that the direction of the secondary current L2 is influenced and changed. The 180 Ā° deflection of the secondary current L2 creates a slight dynamic pressure to the left of the separating element 70, which influences the relationship between the primary current L1 and the secondary current L2, but which can be taken into account when positioning the separating element 70.
- the Figures 3a and 3b illustrate the transition from the guided secondary flow L2 through the second outlet opening 32 into the fluid flow F2 which is only passed through the suction region 20.
- the second outlet opening 32 is provided in the horizontally oriented partial surface 20a of the suction region 20 near the rear wall 3. It is oriented in such a way that a fluid flow F2 inclined at an acute angle to the horizontal is produced, which moves along the underside of the suction area. It forms a barrier layer which keeps the rising exhaust air 5 from direct contact with the suction area.
- the fluid flow F2 flows around the edge between the partial surfaces 20a and 20b and moves towards the slot-shaped inlet opening 30.
- the obliquely upward partial surface 20b can otherwise with a decorative element 24, z.
- the disc can be provided as a flat surface or as a curved element.
- a heating device could be provided on the suction area in order to prevent the formation of condensate or to remove the condensate formed.
- Certain coatings can also be provided for the partial surfaces or for the decorative element, which counteract the formation of condensate by the vapors.
- Fig. 4 shows in detail the area of the partial surface 20b in which the inlet opening 30 is provided.
- the cutout in the decorative element 24 can be clearly seen here.
- the separating device 40 has a strongly curved surface, so that the exhaust air flow is also strongly deflected. With this deflection, the solid and liquid components of the exhaust air migrate outwards and settle on the curved surfaces.
- a second embodiment of the invention is shown.
- the exemplary embodiment is a circulating air hood 7, which is designed as an island hood.
- the same reference numerals are used as in the embodiment Fig. 1 used.
- the recirculation hood 7 is in Fig. 1 the exhaust air is not discharged outside, but is returned to the room.
- an odor filter 13 is provided, through which the exhaust air must first flow.
- This odor filter 13 has a layer of activated carbon, through which the exhaust air must pass.
- This resistance in the flow path of the primary current L1 causes a dynamic pressure upstream of the filter 13. It is therefore not necessary to provide a separating element in order to separate the primary current L1 and secondary current L2. Due to the dynamic pressure, the exhaust air is pressed into the first exhaust air duct 62 and the second exhaust air duct 63 in the desired ratio even without a separating element.
- An island hood is usually used over a cooking island that can be worked on from two sides.
- the extractor hood 7 therefore has two opposite end areas.
- the end regions 21a and 21b are symmetrical.
- the suction area 20 is divided here into three partial areas, a central, horizontally oriented partial area 20a and two symmetrical partial areas 20b and 20c adjoining it on both sides.
- the two outer partial surfaces 20b and 20c are - as in the exemplary embodiment according to Fig. 1 - Pulled diagonally upwards to give a user more headroom and to ensure a clear view of the stove surface.
- the extractor hood 7 has two inlet openings 30a and 30b, each of which is arranged near the respective free end region 21a or 21b.
- the exhaust air 5 is consequently - in contrast to the embodiment Fig. 1 - Sucked off on both sides of the extractor hood 7.
- the second exhaust air duct 63 is guided here in such a way that it can supply two second outlet openings 32a and 32b in the central partial surface 20a with the secondary flow L2.
- the two second outlet openings 32a and 32b are located in the central partial surface 20a and are designed such that a fluid flow F2a or F2b is formed in the direction of the end region 21a or 21b.
- the second outlet openings 32a and 32b are located here in the middle in the suction region 20 with only a small distance from one another.
- the two outward-directed fluid streams also entrain exhaust air, which would otherwise strike the central partial surface 20a between the two second outlet openings 32a and 32b and, under certain circumstances, would leave water droplets there.
- the two fluid flows F2a and F2b are suctioned off via the corresponding inlet opening 30a and 30b, respectively.
- two independent separating devices which are not described here in greater detail, are also provided.
- the fan device 50 is designed here in such a way that sufficient exhaust air 5 can be extracted via both inlet openings 30a and 30b.
- Fig. 6 shows the separation into the primary current L1 and the secondary current L2 in detail. Due to the flow resistance of the filter 13, a dynamic pressure builds up between the fan device 50 and the filter 13. This dynamic pressure also pushes exhaust air into the second exhaust air duct 63 without a separating element.
- the ratio between primary current L1 and secondary current L2 is set here exclusively via the ratio of the input cross sections.
- Fig. 7 the generation of the two fluid flows F2a and F2b is shown again in detail.
- the respective second outlet opening is designed such that the fluid flow is directed obliquely downwards.
- both the inlet opening or the inlet openings and the second outlet opening or the second outlet openings are arranged in the one horizontally oriented surface of the suction region.
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Description
Die Erfindung betrifft eine Vorrichtung zum Ableiten von Luft.The invention relates to a device for discharging air.
Derartige Vorrichtungen zum Ableiten von Luft werden insbesondere in KĆ¼chen eingesetzt, um die Ć¼ber einer Kochstelle bzw. einem Herd entstehenden KochdĆ¼nste abzusaugen und abzufĆ¼hren, ggf. zu reinigen (z.B. zu filtrieren) und in den Raum zurĆ¼ckzufĆ¼hren. Bei der Verwendung in KĆ¼chen handelt es sich um sogenannte Dunstabzugshauben. Dunstabzugshauben kƶnnen, je nach der Art der LuftfĆ¼hrung, in zwei Gruppen unterteilt werden. Bei so genannten Ablufthauben wird die Abluft Ć¼ber eine Rohrleitung nach auĆen gefĆ¼hrt und so dem Raum mit Kochstelle und Ablufthaube entzogen und an die AtmosphƤre auĆerhalb des GebƤudes abgegeben. Eine Fettabscheidung ist Ć¼blicherweise auch bei Ablufthauben vorgesehen. Mit diesen Dunstabzugshauben lassen sich GeruchsbelƤstigungen und Schmutzablagerungen im Kochraum und im GebƤude insgesamt vermeiden. Bei sogenannten Umlufthauben wird die von der Dunstabzugshaube angesogene Luft durch einen Filter oder dergleichen Einrichtung zusƤtzlich von Geruchsstoffen gesƤubert und sodann wieder in den Kochraum zurĆ¼ckgefĆ¼hrt.Such devices for discharging air are used in particular in kitchens in order to extract and dissipate the cooking fumes generated over a hotplate or a stove, to clean them if necessary (e.g. to filter them) and to return them to the room. When used in kitchens, there are so-called extractor hoods. Cooker hoods can be divided into two groups, depending on the type of air duct. In the case of so-called exhaust hoods, the exhaust air is routed to the outside via a pipeline and is thus extracted from the room with the hotplate and exhaust hood and released into the atmosphere outside the building. Grease separation is usually also provided for exhaust hoods. With these extractor hoods, odors and dirt deposits in the cooking area and in the building as a whole can be avoided. In so-called recirculation hoods, the air sucked in by the extractor hood is additionally cleaned of odors by a filter or similar device and then returned to the cooking space.
Herkƶmmliche Dunstabzugshauben beider Gruppen weisen in der Regel eine Abscheideeinrichtung zur Abscheidung der Schmutzpartikel und eine LĆ¼fter- bzw. eine GeblƤseeinrichtung zur Erzeugung eines Luftstroms und zur AbfĆ¼hrung der Abluft auf. Die Abscheidung der Schmutzpartikel kann mittels Abscheidungselementen und/oder einer geeigneten FĆ¼hrung des Luftstroms erfolgen. Die Abscheideeinrichtung entfernt aus der Abluft nahezu alle enthaltenen Feststoffanteile, wie Fett- und Schmutzpartikel, bevor die Abluft in die LĆ¼ftereinheit eintritt.Conventional extractor hoods of both groups generally have a separating device for separating the dirt particles and a fan or blower device for generating an air flow and for removing the exhaust air. The dirt particles can be separated by means of separation elements and / or a suitable guidance of the air flow. The separator removes almost all solid particles, such as fat and dirt particles, from the exhaust air before the exhaust air enters the fan unit.
Bei einer bekannten Dunstabzugshaube wird die Abluft bzw. der Wrasen Ć¼ber eine Einlassƶffnung in einem Ansaugbereich der Abzugshaube in diese aufgenommen. Als Ansaugbereich wird hier der gesamte Bereich bezeichnet, der der Abluftquelle zugewandt ist. Die Einlassƶffnung befindet sich bei dieser Dunstabzugshaube nahe dem Stirnbereich, wobei als Stirnbereich eine freie Seite der Dunstabzugshaube definiert wird, die nicht an eine Wand des Raumes grenzt und an der beispielsweise Bedienelemente angebracht sind, die von einer an der Stirnseite kochenden Person erreichbar sind.In a known extractor hood, the exhaust air or the vapors is taken into the extractor hood via an inlet opening in a suction area thereof. The entire area facing the exhaust air source is referred to here as the suction area. In this extractor hood, the inlet opening is located near the forehead area, a free side of the extractor hood being defined as the forehead area, which does not adjoin a wall of the room and to which, for example, control elements are attached, which can be reached by a person cooking on the end face.
Da die Abluft meist vertikal nach oben steigt, wird nicht die gesamte Abluft auf geradem Wege von der Abluftquelle in die Einlassƶffnung abgesaugt, sondern ein Teil der Abluft wird entlang des Ansaugbereichs strƶmen, bevor er von der Einlassƶffnung erfasst wird. Dies ist insbesondere bei so genannten Kopffreihauben der Fall - bei denen die Dunstabzugshaube im Stirnbereich einen schrƤg gestellten Ansaugbereich aufweist - wenn auf Kochstellen gekocht wird (z. B. auf den der Wand zugewandten Kochstellen), die nicht unmittelbar unter der Einlassƶffnung liegen. Bei so genannten Inselhauben (im Gegensatz zu oben beschriebenen Wandhauben) mit zwei evtl. schrƤg gestellten Ansaugbereichen in zwei Stirnbereichen gilt oben Gesagtes wenn auf mittleren Kochstellen gekocht wird. Wenn die warme, mit Feuchtigkeit gesƤttigte Abluft mit dem kƤlteren Ansaugbereich der Dunstabzugshaube in Kontakt kommt, kann Feuchtigkeit aus der Abluft auskondensieren und Wassertrƶpfchen kƶnnen sich im Ansaugbereich bilden. Diese Kondensatbildung ist unerwĆ¼nscht, da das Kondenswasser, ggf. mit Schmutzpartikeln belastet, auf das Kochfeld tropfen und Speisen verunreinigen kann. Auch bei horizontal ausgerichtetem Ansaugbereich kann diese Problematik auftreten.Since the exhaust air usually rises vertically upwards, not all of the exhaust air is sucked straight from the exhaust air source into the inlet opening, but part of the exhaust air will flow along the suction area before it is captured by the inlet opening. This is particularly the case with so-called headroom hoods - in which the extractor hood has an inclined suction area in the forehead area - when cooking on hotplates (e.g. on the hotplates facing the wall) that are not directly below the inlet opening. In the case of so-called island hoods (in contrast to the wall hoods described above) with two possibly inclined suction areas in two forehead areas, what has been said above applies when cooking on medium-sized hobs. If the warm, moisture-saturated exhaust air comes into contact with the colder suction area of the extractor hood, moisture can condense out of the exhaust air and water droplets can form in the suction area. This formation of condensate is undesirable since the condensed water, possibly contaminated with dirt particles, can drip onto the hob and contaminate food. This problem can also occur with a horizontally oriented suction area.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Ableiten von Luft bei welcher Kondensatbildung im Ansaugbereich eingeschrƤnkt bzw. vermieden wird.The invention has for its object a device for discharging air in which condensate formation in the suction area is restricted or avoided.
Eine aus
Gelƶst wird die Aufgabe gemĆ¤Ć der Erfindung durch eine Vorrichtung zum Ableiten von Luft mit den Merkmalen von Anspruch 1, bzw. mit den Merkmalen von Anspruch 3. ErfindungsgemĆ¤Ć ist wenigstens eine zweite Auslassƶffnung, die in dem Ansaugbereich entweder mittig oder nahe einer - dem wenigstens einen freien Stirnbereich gegenĆ¼berliegenden - Seitenwand vorgesehen, wobei die wenigstens eine zweite Auslassƶffnung ebenfalls so ausgebildet ist, dass ein austretender Fluidstrom den Ansaugbereich Ć¼berstreicht und durch die wenigstens eine schlitzfƶrmige Einlassƶffnung ansaugbar ist.The object is achieved according to the invention by a device for discharging air with the features of
Die Erfindung ist folglich zum einen auf Wandhauben mit einem Stirnbereich und einer Einlassƶffnung anwendbar. Diese Wandhauben weisen gemĆ¤Ć der Erfindung eine zweite Auslassƶffnung auf, die in dem Ansaugbereich nahe einer - dem einen freien Stirnbereich gegenĆ¼berliegenden - Seitenwand vorgesehen ist, wobei die eine zweite Auslassƶffnung so ausgebildet ist, dass ein austretender Fluidstrom den Ansaugbereich Ć¼berstreicht und durch die eine schlitzfƶrmige Einlassƶffnung ansaugbar ist. Zum anderen ist die Erfindung aber auch auf Inselhauben mit wenigstens zwei Stirnbereichen und wenigstens zwei Einlassƶffnungen anwendbar. Diese Inselhauben weisen gemĆ¤Ć der Erfindung mehrere zweite Auslassƶffnungen auf, die in dem Ansaugbereich mittig vorgesehen sind, wobei die mehreren zweiten Auslassƶffnungen so ausgebildet sind, dass die austretenden Fluidstrƶme den Ansaugbereich Ć¼berstreichen und durch die mehreren schlitzfƶrmigen Einlassƶffnungen ansaugbar sind.The invention is therefore applicable on the one hand to wall hoods with an end region and an inlet opening. According to the invention, these wall hoods have a second outlet opening, which is provided in the suction area near a side wall - opposite the free end area - the second outlet opening being designed such that an emerging fluid flow sweeps over the suction area and through the slit-shaped inlet opening is suckable. On the other hand, the invention is also applicable to island hoods with at least two end areas and at least two inlet openings. According to the invention, these island hoods have a plurality of second outlet openings which are provided in the center of the suction area, the plurality of second outlet openings being designed in such a way that the emerging fluid streams sweep over the suction area and can be sucked in through the plurality of slot-shaped inlet openings.
Der wenigstens eine Fluidstrom bildet unter dem Ansaugbereich eine Schicht und verhindert auf diese Weise, dass aufsteigende feuchte Abluft direkt mit dem Ansaugbereich in BerĆ¼hrung kommt. Gleichzeitig wird die aufsteigende Abluft umgelenkt und mit dem Fluidstrom in Richtung der Einlassƶffnung bewegt. Ein Ausfallen von Feuchtigkeit wird somit verhindert. Sollte es in seltenen FƤllen doch einmal zur Bildung kleiner Wassertrƶpfchen kommen, werden diese durch den Fluidstrom wieder verdunstet und der Ansaugbereich wieder getrocknet.The at least one fluid stream forms a layer under the suction area and in this way prevents rising damp exhaust air from coming into direct contact with the suction area. At the same time, the rising exhaust air is deflected and moved with the fluid flow in the direction of the inlet opening. This prevents moisture from falling out. If, in rare cases, small water droplets do form, they are evaporated again by the fluid flow and the suction area is dried again.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus dem Unteranspruch.Further details and advantages of the invention result from the subclaim.
Es hat sich herausgestellt, dass Dunstabzugshauben am wirksamsten arbeiten, wenn im Grenzbereich zwischen der Abluftquelle und dem offenen Raum eine sehr hohe Luftgeschwindigkeit erreicht wird. Es sollte deshalb in diesem Bereich ein quasi nach oben strƶmender, schnell bewegter Luftvorhang Ć¼ber die gesamte Breite der Dunstabzugshaube erzeugt werden. Die wenigstens eine Einlassƶffnung ist deshalb schlitzfƶrmig ausgebildet, verlƤuft parallel zu dem wenigstens einen freien Stirnbereich und erstreckt sich nahezu Ć¼ber die gesamte Breite des wenigstens einen freien Stirnbereichs.It has been found that extractor hoods work most effectively when a very high air speed is reached in the border area between the exhaust air source and the open space. Therefore, a quasi upward flowing, rapidly moving air curtain should be created across the entire width of the extractor hood in this area. The at least one inlet opening is therefore slit-shaped, runs parallel to the at least one free forehead area and extends almost over the entire width of the at least one free forehead area.
Einerseits soll der Fluidstrom den direkten Kontakt der Abluft mit dem Ansaugbereich verhindern, andererseits darf er die mitgefĆ¼hrte Abluft aber nicht so beschleunigen, dass sie Ć¼ber die Einlassƶffnung hinausgedrĆ¼ckt wird und deshalb nicht mehr Ć¼ber diese abgesaugt werden kann. Der aus der wenigstens einen zweiten Auslassƶffnung austretende Fluidstrom wird deshalb erfindungsgemĆ¤Ć so dimensioniert, dass der Fluidstrom zwischen 2% und 10%, insbesondere zwischen 3% und 5%, des Volumenstroms der angesaugten Abluft in dem Abblaskanal betrƤgt. Das genaue VerhƤltnis zwischen Volumenstrom der angesaugten Abluft und Fluidstrom richtet sich nach den konstruktiven Gegebenheiten der Ablufthaube wie z. B. GrƶĆe des Ansaugbereichs, SchrƤgstellung des Ansaugbereichs, FĆ¼hrung des Teilstroms vor dem Austritt aus der zweiten Auslassƶffnung, Dimensionierung der zweiten Auslassƶffnung usw..On the one hand, the fluid flow should prevent the exhaust air from coming into direct contact with the intake area, on the other hand, however, it must not accelerate the exhaust air that is carried along so that it is pushed beyond the inlet opening and therefore can no longer be extracted through it. The fluid flow emerging from the at least one second outlet opening is therefore dimensioned according to the invention such that the fluid flow is between 2% and 10%, in particular between 3% and 5%, of the volume flow of the sucked-in exhaust air in the blow-off duct. The exact ratio between the volume flow of the intake air and the fluid flow depends on the design of the exhaust hood, e.g. B. size of the suction area, inclination of the suction area, guiding the partial flow before exiting the second outlet opening, dimensioning of the second outlet opening, etc.
Der Fluidstrom kann Ć¼ber ein eigenes GeblƤse erzeugt werden, welches entweder Luft von der GebƤudeauĆenseite oder aber Luft aus dem Raum ansaugt. Der apparatetechnische Aufwand ist aber in beiden FƤllen relativ hoch. Es ist deshalb vorteilhaft in Strƶmungsrichtung nach der LĆ¼ftereinrichtung eine Teileinrichtung zum Aufteilen des Volumenstroms der angesaugten Abluft vorgesehen. Es lƤsst sich auf diese Weise ein gutes Ergebnis auch ohne ZusatzgeblƤse erreichen. Weiterhin lƤsst sich so ohne zusƤtzlichen Regelaufwand eine automatische Anpassung des Fluidstroms an den Volumenstrom der angesaugten Abluft realisieren.The fluid flow can be generated by its own fan, which either draws air from the outside of the building or air from the room. In both cases, the expenditure on equipment is relatively high. It is therefore advantageous in the flow direction after the fan device to provide a sub-device for dividing the volume flow of the intake air. In this way, a good result can also be achieved without an additional fan. Furthermore, an automatic adjustment of the fluid flow to the volume flow of the sucked-in exhaust air can be realized without additional control effort.
ErfindungsgemĆ¤Ć ist mindestens ein erster Abluftkanal zum FĆ¼hren eines erste Teilstroms der angesaugten Abluft und mindestens ein zweiter Abluftkanal zum FĆ¼hren eines zweiten Teilstroms der angesaugten Abluft vorgesehen, wobei der erste Teilstrom und der zweite Teilstrom mittels eines Trennelements voneinander trennbar sind. Das Trennelement kann beispielsweise als einfaches Trennblech auf der Abblasseite der LĆ¼ftereinrichtung ausgefĆ¼hrt sein. Der erste Teilstrom der angesaugten Abluft, der eigentliche Hauptstrom, kann dann der ersten Auslassƶffnung zugefĆ¼hrt werden, von der er entweder zur GebƤudeauĆenseite geleitet oder Ć¼ber einen Geruchsfilter, in den meisten FƤllen einen Aktivkohlefilter, wieder in den Raum zurĆ¼ckgefĆ¼hrt wird.According to the invention, at least one first exhaust air duct for guiding a first partial flow of the sucked-in exhaust air and at least one second exhaust air duct for guiding a second partial flow of the sucked-in exhaust air are provided, the first partial stream and the second partial stream being separable from one another by means of a separating element. The separating element can be designed, for example, as a simple separating plate on the blow-off side of the fan device. The first partial flow of the sucked-in exhaust air, the actual main flow, can then be fed to the first outlet opening, from which it either leads to the outside of the building or is returned to the room via an odor filter, in most cases an activated carbon filter.
ErfindungsgemĆ¤Ć lenkt der zweite Abluftkanal den Teilstrom um und fĆ¼hrt ihn zu der wenigstens einen zweiten Auslassƶffnung. Die Umlenkung sollte so erfolgen, dass mƶglichst wenig Strƶmungsenergie vernichtet wird. Dabei ist direkt nach der LĆ¼ftereinrichtung eine Umlenkung um etwa 180Ā° notwendig. Vor der MĆ¼ndung des zweiten Abluftkanals in eine zweite Auslassƶffnung muss eine weitere Umlenkung erfolgen, die gewƤhrleistet, dass der Fluidstrom nicht senkrecht nach unten gerichtet ist, sondern den Ansaugbereich Ć¼berstreicht.According to the invention, the second exhaust air duct deflects the partial flow and leads it to the at least one second outlet opening. The deflection should take place in such a way that as little flow energy as possible is destroyed. A deflection of approximately 180 Ā° is necessary directly after the fan device. Before the second exhaust air duct opens into a second outlet opening, a further deflection must take place, which ensures that the fluid flow is not directed vertically downwards, but rather sweeps over the suction area.
Durch den Fluidstrom soll mƶglichst der gesamte Ansaugbereich Ć¼berstrichen werden. Die wenigstens eine zweite Auslassƶffnung ist deshalb spaltfƶrmig ausgebildet. Die zweite Auslassƶffnung verlƤuft vorteilhaft parallel zu der Ansaugƶffnung und weist in etwa die gleiche LƤnge auf. Dadurch kann von der Ansaugƶffnung der gesamte aus der zweiten Austrittsƶffnung austretende Fluidstrom aufgenommen werden.The entire suction area should be covered by the fluid flow if possible. The at least one second outlet opening is therefore formed in the form of a gap. The second outlet opening advantageously runs parallel to the suction opening and has approximately the same length. As a result, the entire fluid stream emerging from the second outlet opening can be received by the suction opening.
Der Fluidstrom soll die gesamte mit Feuchtigkeit beladene aufsteigende Abluft erfassen. Der Spalt der wenigstens einen zweiten Auslassƶffnung erstreckt sich daher parallel zu der - dem wenigstens einen freien Stirnbereich gegenĆ¼berliegenden - Seitenwand. Ist die Vorrichtung als Wandhaube ausgefĆ¼hrt, soll der Abstand des Spalts zu der Wand, an der die Vorrichtung befestigt ist, mƶglichst gering sein.The fluid flow is intended to capture all of the rising exhaust air laden with moisture. The gap of the at least one second outlet opening therefore extends parallel to the side wall - opposite the at least one free end region. If the device is designed as a wall hood, the distance of the gap to the wall to which the device is attached should be as small as possible.
Die Breite des Spalts muss so dimensioniert werden, dass der zur VerfĆ¼gung stehende Volumenstrom in dem zweiten Abluftkanal einen Fluidstrom unterhalb des Ansaugbereichs erzeugt, dessen Geschwindigkeit groĆ genug ist, die aufsteigende Abluft zu der Ansaugƶffnung hin zu fĆ¼hren, ohne sie dabei an der Ansaugƶffnung vorbei zu drĆ¼cken. Idealerweise betrƤgt die Breite des Spalts zwischen 2 und 5 mm. Sie hƤngt hauptsƤchlich von dem Volumenstrom in dem zweiten Abluftkanal ab.The width of the gap must be dimensioned so that the available volume flow in the second exhaust air duct generates a fluid stream below the intake area, the speed of which is high enough to guide the rising exhaust air to the intake opening without passing it past the intake opening to press. Ideally, the width of the gap is between 2 and 5 mm. It mainly depends on the volume flow in the second exhaust air duct.
Der Ansaugbereich weist vorteilhaft wenigstens zwei TeilflƤchen auf, die zusammen einen stumpfen Winkel einschlieĆen. Dadurch lƤsst sich die Kante im Stirnbereich einer Dunstabzugshaube nach oben ziehen, so dass diese in den Raum hineinragende Kante die Kopffreiheit einer kochenden Person nicht behindert. Der zum Stirnbereich gerichtete Teil des Ansaugbereichs dieser Kopffreihauben ist folglich nicht nur der Abluftquelle sondern auch der kochenden Person zugewandt, wobei die Senkrechte auf diese TeilflƤche zwischen die Abluftquelle und die kochende Person zeigt. Bei diesen Dunstabzugshauben muss besonders darauf geachtet werden, dass sich an dem Ansaugbereich kein Kondensat bildet. Auskondensiertes Wasser wĆ¼rde an der schrƤgen FlƤche herablaufen und sich an der Verbindungskante der beiden TeilflƤchen sammeln. Da diese Verbindungskante eine Tropfkante darstellt, ist die Gefahr, dass sich Wassertropfen lƶsen, an dieser Stelle besonders groĆ. Der Fluidstrom muss folglich bei diesen Kopffreihauben besonders gut auf die Konstruktion abgestimmt sein.The suction area advantageously has at least two partial surfaces which together form an obtuse angle. This allows the edge in the forehead area of an extractor hood to be pulled upwards, so that this edge protruding into the room does not hinder the headroom of a person cooking. The part of the suction area of these headroom hoods directed towards the forehead area is consequently not only the exhaust air source but also also facing the boiling person, the perpendicular pointing to this partial area between the exhaust air source and the boiling person. With these extractor hoods, special care must be taken to ensure that no condensate forms at the intake area. Condensed water would run down the sloping surface and collect at the connecting edge of the two partial surfaces. Since this connecting edge is a drip edge, the risk of water drops loosening is particularly high at this point. The fluid flow in these headroom hoods must therefore be particularly well matched to the design.
Die so genannten Inselhauben werden Ć¼ber im Raum stehenden Kochinseln verwendet, die wenigstens von zwei Seiten zugƤnglich sind. Diese Dunstabzugshauben weisen daher auch zwei gegenĆ¼berliegende Stirnbereiche auf. Um hier alle von den Kochstellen aufsteigende Abluft ohne Kondensationsgefahr erfassen zu kƶnnen, sind an zwei gegenĆ¼berliegenden Seiten des Ansaugbereichs je eine schlitzfƶrmige Einlassƶffnung und, mittig zwischen den beiden schlitzfƶrmigen Einlassƶffnungen, zwei zweite Auslassƶffnungen vorgesehen.The so-called island hoods are used above standing cooking islands that are accessible from at least two sides. These extractor hoods therefore also have two opposite end areas. In order to be able to record all the exhaust air rising from the hotplates here without the risk of condensation, a slot-shaped inlet opening and two second outlet openings are provided on two opposite sides of the intake area and centrally between the two slot-shaped inlet openings.
Bei diesen Dunstabzugshauben sollen in der Mitte zwei Fluidstrƶme erzeugt werden, die von der Mitte aus in entgegengesetzte Richtungen nach auĆen geleitet werden. Die zweiten Auslassƶffnungen sind deshalb so ausgebildet, dass der jeweils austretende Fluidstrom den Ansaugbereich zwischen der jeweiligen zweiten Auslassƶffnung und der nƤchstliegenden Einlassƶffnung so Ć¼berstreicht, dass er durch diese nƤchstliegende Einlassƶffnung ansaugbar ist. Damit ist sichergestellt, dass sowohl an beiden Stirnseiten aufsteigende Abluft erfasst und angesaugt, aber auch eine Kondensation zwischen den beiden Ansaugƶffnungen vermieden wird.In these extractor hoods, two fluid flows are to be generated in the middle, which are directed from the center in opposite directions to the outside. The second outlet openings are therefore designed in such a way that the respectively emerging fluid flow sweeps over the suction area between the respective second outlet opening and the closest inlet opening in such a way that it can be sucked in through this nearest inlet opening. This ensures that exhaust air rising on both end faces is captured and sucked in, but also that condensation between the two intake openings is avoided.
Auch diese Inselhauben kƶnnen als Kopffreihauben ausgefĆ¼hrt werden. In diesem Fall weist der Ansaugbereich vorteilhaft drei TeilflƤchen auf, wobei die ƤuĆeren TeilflƤchen mit der mittleren TeilflƤche jeweils einen stumpfen Winkel bilden und die Einlassƶffnungen in den ƤuĆeren TeilflƤchen sowie die zweiten Auslassƶffnungen in der mittleren TeilflƤche vorgesehen sind. Auch hier gilt das bereits oben Gesagte bezĆ¼glich der erhƶhten Tropfgefahr von gesammeltem Kondensat. Hier mĆ¼ssen beide Fluidstrƶme entsprechend eingestellt werden.These island hoods can also be designed as headroom hoods. In this case, the suction area advantageously has three partial surfaces, the outer partial surfaces each forming an obtuse angle with the central partial surface and the inlet openings in the outer partial surfaces and the second outlet openings in the central partial surface. The statements made above regarding the increased risk of dripping of condensate collected also apply here. Here both fluid flows must be set accordingly.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der Beschreibung eines AusfĆ¼hrungsbeispiels, das anhand der Zeichnung eingehend erlƤutert wird.Further details and advantages of the invention result from the description of an exemplary embodiment, which is explained in detail with reference to the drawing.
Es zeigt:
- Fig. 1
- eine als Wandhaube ausgebildete AusfĆ¼hrungsform der erfindungsgemƤĆen Vorrichtung im Schnitt,
- Fig. 2
- die Aufteilung des Volumenstroms in zwei Teilstrƶme entsprechend dem AusfĆ¼hrungsbeispiel nach
Fig. 1 , - Fig. 3a
- die Erzeugung des Fluidstroms nach dem AusfĆ¼hrungsbeispiel aus
Fig. 1 , sowie - Fig. 3b
- ein Detail aus
Fig. 3a - Fig. 4
- die Einlassƶffnung mit Abscheideeinrichtung entsprechend dem AusfĆ¼hrungsbeispiel nach
Fig. 1 , - Fig. 5
- ein als Inselhaube ausgebildetes weiteres AusfĆ¼hrungsbeispiel der Erfindung im Schnitt,
- Fig. 6
- die Aufteilung des Volumenstroms in zwei Teilstrƶme entsprechend dem AusfĆ¼hrungsbeispiel nach
Fig. 5 und - Fig. 7
- die Erzeugung der Fluidstrƶme in dem AusfĆ¼hrungsbeispiel nach
Fig. 5 im Detail.
- Fig. 1
- an embodiment of the device according to the invention, designed as a wall hood, in section,
- Fig. 2
- the division of the volume flow into two partial flows according to the embodiment
Fig. 1 , - Fig. 3a
- the generation of the fluid flow according to the embodiment
Fig. 1 , such as - Fig. 3b
- a detail out
Fig. 3a - Fig. 4
- the inlet opening with separating device according to the embodiment
Fig. 1 , - Fig. 5
- a further embodiment of the invention designed as an island hood in section,
- Fig. 6
- the division of the volume flow into two partial flows according to the embodiment
Fig. 5 and - Fig. 7
- the generation of the fluid streams in the embodiment
Fig. 5 in detail.
In der nachfolgenden Beschreibung werden fĆ¼r gleiche und gleich wirkende Teile dieselben Bezugsziffern verwendet.In the following description, the same reference numbers are used for the same and equivalent parts.
Die als Dunstabzugshaube ausgebildete Vorrichtung 1 umfasst ein GehƤuse 2 mit einem Stirnbereich 21, eine dem Stirnbereich gegenĆ¼berliegende Seitenwand (RĆ¼ckwand 3) und einen Ansaugbereich 20. Als Ansaugbereich 20 wird die komplette Unterseite der Dunstabzugshaube 1 bezeichnet, die der Abluftquelle 6 zugewandt ist, wobei die Abluftquelle 6 z.B. auf einer Kochmulde bzw. einem Herd (hier nicht gezeigt) steht.The
Wie
In dem Ansaugbereich 20 der Dunstabzugshaube 1 ist eine schlitzfƶrmige Einlassƶffnung 30 vorgesehen, so dass die zum Ableiten vorgesehene Luft bzw. Abluft 6 angesaugt werden kann. Die Einlassƶffnung 30 verlƤuft parallel und mit geringem Abstand zu der am weitesten in den Raum hineinstehenden Kante der TeilflƤche 20b des Ansaugbereichs. Diese Anordnung stellt sicher, dass auch aller Wrasen, der von dem Kochtopf 6 ausgeht erfasst werden kann und nicht an dem Ansaugbereich 20 vorbei in den Raum strƶmt.A slit-shaped inlet opening 30 is provided in the
In der Dunstabzugshaube 1 ist in Strƶmungsrichtung nach der Einlassƶffnung 30 eine mit ZwangsfĆ¼hrungsmittel ausgebildete Abscheideeinrichtung 40 (siehe
Die LĆ¼ftereinrichtung 50 baut in dem Abluftfƶrderkanal einen Unterdruck auf, der die gereinigte Abluft aus der Abscheideeinrichtung 40 zieht. In Strƶmungsrichtung nach der LĆ¼ftereinrichtung 50 ist der Abblaskanal 61 vorgesehen. Dieser fĆ¼hrt die gesamte angesaugte Abluft und bildet den Volumenstrom L.The
Da es sich bei dem gezeigten AusfĆ¼hrungsbeispiel um eine Ablufthaube handelt, bei der die durch die LĆ¼ftereinrichtung 50 gefƶrderte Abluft ohne Filter zur GebƤudeauĆenseite geleitet wird, entsteht nach der LĆ¼ftereinrichtung 50 kaum ein Druckanstieg, Ć¼ber den eine Auftrennung des Volumenstroms L in zwei Teilstrƶme vollziehbar wƤre. Es ist deshalb ein Trennelement 70 vorgesehen, welches den Abblaskanal 71 aufteilt. Die Auftrennung wird bei diesem AusfĆ¼hrungsbeispiel folglich Ć¼ber die Strƶmung des Volumenstroms L erreicht.Since the exemplary embodiment shown is an exhaust hood, in which the exhaust air conveyed by the
Das Trennelement 70 ist parallel zur Strƶmungsrichtung des Volumenstroms L ausgerichtet und teilt den Abblaskanal 61 an seinem oberen Ende so auf, dass ein erster Abluftkanal 62 und ein zweiter Abluftkanal 63 entstehen. Der erste Abluftkanal 62 fĆ¼hrt zu einer ersten Auslassƶffnung 31, wƤhrend der zweite Abluftkanal 63 zu einer zweiten Auslassƶffnung 32 fĆ¼hrt. Das Trennelement 70 ist so angeordnet, dass der erste Abluftkanal mit etwa 97% des Volumenstroms L und der zweite Abluftkanal 63 mit etwa 3% Volumenstroms L beschickt werden. Der entstehende PrimƤrstrom L1 in dem Abluftkanal 62 verhƤlt sich folglich zu dem entstehenden SekundƤrstrom L2 in dem zweiten Abluftkanal 63 etwa wie 32:1.The separating
Dieses VerhƤltnis gewƤhrleistet, dass der aus der zweiten Auslassƶffnung 32 austretende Fluidstrom F2 unter dem Ansaugbereich 20 eine Art Sperrschicht bildet, die den direkten Kontakt der aufsteigenden Abluft 5 mit dem Ansaugbereich 20 verhindert. Es kann deshalb auch keine aus dem aufsteigenden Wrasen ausfallende Feuchtigkeit an dem Ansaugbereich 20 kondensieren und beispielsweise in den darunter stehenden Topf tropfen. Gleichzeitig wird aber durch dieses VerhƤltnis auch verhindert, dass der Fluidstrom F2 so krƤftig ist, dass er Ć¼ber die Einlassƶffnung hinaus treibt und die aufsteigende Abluft 5 im Stirnbereich 21 an der Dunstabzugshaube 1 vorbei fĆ¼hrt.This ratio ensures that the fluid flow F2 emerging from the second outlet opening 32 forms a kind of barrier layer under the
Die erste Auslassƶffnung 31 wird durch den Abluftstutzen 33 gebildet. Hier kann beispielsweise ein Schlauch befestigt werden, der Ć¼ber eine Mauerƶffnung direkt ins Freie fĆ¼hrt.The first outlet opening 31 is formed by the
Die zweite Auslassƶffnung 32 ist an der Unterseite der Dunstabzugshaube 1 in dem der Abluftquelle 6 zugewandten Ansaugbereich 20 vorgesehen. Ćber die zweite Auslassƶffnung 32 tritt der Fluidstrom F2 aus dem GehƤuse 2 der Dunstabzugshaube 1 aus. Die zweite Auslassƶffnung 32 bildet einen Schlitz, der parallel zu der Einlassƶffnung 30 angeordnet ist und nahe der RĆ¼ckwand 3 verlƤuft. Der Schlitz ist so gestaltet, dass der austretende Fluidstrom F2 in etwa 15Ā° gegenĆ¼ber der Horizontalen geneigt ist. Der austretende Fluidstrom F2 Ć¼berstreicht dadurch den Ansaugbereich in seiner gesamten Breite und wird durch die ebenfalls schlitzfƶrmige Einlassƶffnung 30 wieder vollstƤndig abgesaugt.The second outlet opening 32 is provided on the underside of the
Das Trennelement 70 ist hier als abgewinkeltes Element vorgesehen, so dass der von dem Volumenstrom L abgeteilte SekundƤrstrom L2 aus der LĆ¼ftereinrichtung 50 in den zweiten Abluftkanal 63 hinein gelenkt wird. Bevorzugt ist hier ein Winkel von etwa 45Ā° vorgesehen (siehe
Der zweite Abluftkanal 63 verlƤuft zwischen der RĆ¼ckwand 3 der Dunstabzugshaube 1 und einer Wand des GehƤuses der LĆ¼ftereinrichtung 50, bzw. er wird von diesen WƤnden und den in der geschnittenen Darstellung nicht sichtbaren SeitenwƤnden der Dunstabzugshaube 1 ausgebildet. Der Querschnitt des ersten Abluftkanals 62 ist grƶĆer als der Querschnitt des zweiten Abluftkanals 63, da der Hauptanteil des Volumenstroms L tatsƤchlich Ć¼ber die erste Auslassƶffnung 31 ausgeblasen werden soll, wƤhrend nur ein kleiner Teil aus der zweiten Auslassƶffnung 32 ausgeblasen werden soll.The second
Da durch die Abscheideeinrichtung 40 Wassertrƶpfchen, die aus der Abluft 5 aufgrund einer AbkĆ¼hlung auskondensiert sind, bereits abgeschieden wurden, ist der Fluidstrom F2 relativ trocken und kann sogar wieder Feuchtigkeit aufnehmen. Dies ist insbesondere dann wichtig, wenn die Dunstabzugshaube erst nach Kochbeginn eingeschaltet wurde und sich an ihrem Ansaugbereich 20 bereits Wassertropfen gebildet haben. Diese Wassertropfen werden dann durch den Fluidstrom F2 langsam wieder abgebaut, so dass sogar eine Trocknung des Ansaugbereichs 20 mƶglich wird.Since water droplets which have condensed out of the
Die
ZusƤtzlich kƶnnte eine Heizeinrichtung am Ansaugbereich vorgesehen sein, um die Kondensatbildung zu verhindern bzw. entstandenes Kondensat zu beseitigen. Auch kƶnnen bestimmte Beschichtungen fĆ¼r die TeilflƤchen oder fĆ¼r das Dekorelement vorgesehen sein, die einer Kondensatbildung durch den Wrasen entgegenwirken.In addition, a heating device could be provided on the suction area in order to prevent the formation of condensate or to remove the condensate formed. Certain coatings can also be provided for the partial surfaces or for the decorative element, which counteract the formation of condensate by the vapors.
Die Abscheideeinrichtung 40 weist eine stark gekrĆ¼mmte FlƤche auf, so dass auch der Abluftstrom eine starke Umlenkung erfƤhrt. Bei dieser Umlenkung wandern die festen und flĆ¼ssigen Bestandteile der Abluft nach auĆen und setzen sich auf den gekrĆ¼mmten FlƤchen ab.The separating
In
Bei der Umlufthaube 7 wird im Gegensatz zu der Ablufthaube 1 in
Dieser Widerstand im Strƶmungsweg des PrimƤrstroms L1 bewirkt einen Staudruck vor dem Filter 13. Es braucht deshalb kein Trennelement vorgesehen werden, um PrimƤrstrom L1 und SekundƤrstrom L2 aufzutrennen. Durch den Staudruck wird die Abluft auch ohne Trennelement in dem gewĆ¼nschten VerhƤltnis in den ersten Abluftkanal 62 und den zweiten Abluftkanal 63 gedrĆ¼ckt.This resistance in the flow path of the primary current L1 causes a dynamic pressure upstream of the
Eine Inselhaube wird Ć¼blicherweise Ć¼ber einer Kochinsel verwendet, an der von zwei Seiten gearbeitet werden kann. Die Dunstabzugshaube 7 weist deshalb zwei gegenĆ¼berliegende Stirnbereiche auf. Die Stirnbereich 21a und 21b sind symmetrisch ausgebildet.An island hood is usually used over a cooking island that can be worked on from two sides. The
Der Ansaugbereich 20 ist hier in drei TeilflƤchen unterteilt, eine mittlere, horizontal ausgerichtete TeilflƤche 20a und zwei beidseitig daran anschlieĆende, symmetrisch ausgebildete TeilflƤchen 20b und 20c. Die beiden ƤuĆeren TeilflƤchen 20b und 20c sind - wie schon in dem AusfĆ¼hrungsbeispiel nach
Die Dunstabzugshaube 7 weist zwei Einlassƶffnungen 30a und 30b auf, von denen jede nahe dem jeweiligen freien Stirnbereich 21a bzw. 21b angeordnet ist. Die Abluft 5 wird folglich - im Gegensatz zu dem AusfĆ¼hrungsbeispiel aus
Der zweite Abluftkanal 63 ist hier so gefĆ¼hrt, dass er zwei zweite Auslassƶffnungen 32a und 32b in der mittleren TeilflƤche 20a mit dem SekundƤrstrom L2 versorgen kann. Die beiden zweiten Auslassƶffnungen 32a und 32b befinden sich in der mittleren TeilflƤche 20a und sind so gestaltet, dass jeweils ein Fluidstrom F2a bzw. F2b in Richtung des Stirnbereichs 21a bzw. 21b gebildet wird. Die zweiten Auslassƶffnungen 32a und 32b befinden sich hier also mittig im Ansaugbereich 20 mit nur geringem Abstand voneinander. Die beiden jeweils nach auĆen gerichteten Fluidstrƶme reiĆen auch Abluft mit, die ansonsten zwischen den beiden zweiten Auslassƶffnungen 32a und 32b auf die mittlere TeilflƤche 20a auftreffen und dort unter UmstƤnden Wassertrƶpfchen hinterlassen wĆ¼rde.The second
Die beiden Fluidstrƶme F2a und F2b werden jeweils Ć¼ber die entsprechende Einlassƶffnung 30a bzw. 30b abgesaugt. In Strƶmungsrichtung hinter den Einlassƶffnungen sind auch zwei unabhƤngige, hier nicht nƤher bezeichnete Abscheideeinrichtungen vorgesehen. Die LĆ¼ftereinrichtung 50 ist hier so ausgelegt, dass Ć¼ber beide Einlassƶffnungen 30a und 30b genĆ¼gend Abluft 5 abgesaugt werden kann.The two fluid flows F2a and F2b are suctioned off via the corresponding inlet opening 30a and 30b, respectively. In the flow direction behind the inlet openings, two independent separating devices, which are not described here in greater detail, are also provided. The
In
Es muss noch erwƤhnt werden, dass die vorliegende Offenbarung selbstverstƤndlich auch bei Dunstabzugshauben anwendbar ist, deren der Abluftquelle zugewandter Ansaugbereich nur eine horizontal ausgerichtete FlƤche aufweist, die also nicht als Kopffreihauben ausgefĆ¼hrt sind. In diesem Fall sind sowohl die Einlassƶffnung oder die Einlassƶffnungen und die zweite Austrittsƶffnung oder die zweiten Austrittsƶffnungen in der einen horizontal ausgerichteten FlƤche des Ansaugbereichs angeordnet.It must also be mentioned that the present disclosure can of course also be applied to extractor hoods whose suction area facing the exhaust air source has only a horizontally oriented surface, and which are therefore not designed as headroom hoods. In this case, both the inlet opening or the inlet openings and the second outlet opening or the second outlet openings are arranged in the one horizontally oriented surface of the suction region.
- 11
- Dunstabzugshaube, Wandhaube, AblufthaubeExtractor hood, wall hood, exhaust hood
- 22nd
- GehƤusecasing
- 33rd
- RĆ¼ckwandBack wall
- 44th
- RaumbegrenzungswandRoom boundary wall
- 55
- AbluftExhaust air
- 66
- AbluftquelleExhaust air source
- 77
- Dunstabzugshaube, Inselhaube, UmlufthaubeExtractor hood, island hood, air circulation hood
- 2020th
- AnsaugbereichSuction area
- 20a, b, c20a, b, c
- TeilflƤchenPartial areas
- 2121st
- StirnbereichForehead area
- 2424th
- DekorelementDecorative element
- 3030th
- EinlassƶffnungInlet opening
- 3131
- Erste AuslassƶffnungFirst outlet opening
- 3232
- Zweite AuslassƶffnungSecond outlet opening
- 3333
- AbluftstutzenExhaust port
- 4040
- AbscheideeinrichtungSeparator
- 5050
- LĆ¼ftereinrichtungFan device
- 6060
- LuftfƶrderkanalAir delivery channel
- 6161
- AbblaskanalBlow-off duct
- 6262
- Erster AbluftkanalFirst exhaust duct
- 6363
- Zweiter AbluftkanalSecond exhaust duct
- 7070
- TrennelementSeparating element
- L1L1
- PrimƤrstromPrimary current
- L2L2
- SekundƤrstromSecondary current
Claims (3)
- A device (1) for discharging exhaust air (5) generated on a hob (6), comprising:a housing (2) having a rear wall (3) for fastening the device (1) to a room wall (4), a front wall area (21) opposite the rear wall (3) and a bottom side having a suction area (20) facing the hob (6),wherein the suction area (20) has two partial surfaces (20a, 20b) at an angle to each another, wherein a first partial surface (20a) extends from the rear wall (3) and is aligned horizontally, and a second partial surface (20b) arranged at an obtuse angle to the first partial surface (20a), such that the head of an operator of the hob (6) does not collide with the second partial surface (20b),a slot-shaped inlet opening (30) formed in an upper area of the second partial surface (20b) and extending in parallel to a horizontal end edge of the second partial surface (20b),separating means (40) arranged in an exhaust air conveying channel (60) and adjacent to the inlet opening (30), said separating means (40) having positive guidance means formed by way of a curved surface for separating particles from the exhaust air (5) carried therewith,a fan means (50) for sucking exhaust air (5) via the inlet opening (30) and generating a volume flow (L) within an exhaust duct (61) communicating with the fan device (50), which exhaust duct (61) being arranged downstream of the fan device (50),a separating element (70) arranged in an upper end of the exhaust duct (61) and dividing the upper end of the exhaust duct (61) into a first exhaust air duct (62) and a second exhaust air duct (63), wherein the first exhaust air duct (62) communicates with a first outlet opening (31) and the second exhaust air duct (63) communicates with a second outlet opening (32),wherein the separating element (70) has a lower region arranged in parallel to the direction of flow of the volume flow (L), and an angled upper region supporting a deflection of a secondary flow (L2) separated from the volume flow (L) into the second exhaust air duct (63), and wherein the separating element (70) is arranged such that the secondary flow (L2) supplied to the second exhaust air duct (63), comprises 2% to 10% of the volume flow (L),wherein the second exhaust air duct (63) runs between the rear wall (3) of the housing (2), the side walls thereof and a housing wall of the fan means (50), andwherein the second outlet opening (32) is formed as a slot in the first partial surface (20a) and is arranged in parallel to the inlet opening (30), and is configured in such a way that a fluid stream (F2) emerging from the second outlet opening (32) has an angle of inclination which, with respect to the horizontal of the first partial surface (20a), is approximately 15Ā°.
- The device according to claim 1, characterized in that the width of the slot (32) is between 2 and 5 mm.
- A device (7) for discharging exhaust air (5) generated on a hob (6), comprising:a housing (2) having two opposite symmetrical end regions (21a; 21b) and a bottom side having with a suction area (20) facing the hob (6),wherein the suction area (20) has a central, horizontally oriented partial surface (20a) and two outer partial surfaces (20b; 20c) each arranged at an obtuse angle to the central partial surface (20a), such that the head of an operator of the hob (6) does not collide with one of the two outer partial surfaces (20b; 20c), whereineach of the two outer partial surfaces (20b; 20c) has a slot-shaped inlet opening (30a; 30b), each formed in an upper area of the outer partial surface (20a; 20b) and extending in parallel to a horizontal end edge of the outer partial surface (20b; 20c),a separating means arranged within an exhaust air conveying channel of the housing (2) and adjacent to said two inlet openings (30a; 30b), the separating means having positive guidance means formed by way of a curved surface for separating particles carried in the exhaust air (5),a fan means (50) for extracting exhaust air (5) via said two inlet openings (30a; 30b) and for generating a volume flow in an exhaust duct arranged downstream of the fan means (50) and communicating therewith,a filter (13) arranged downstream of the fan means (50) and having an activated carbon layer,a first exhaust air duct (62) for receiving a primary flow (LI) separated from the volume flow, passing said primary flow through the filter (13) and returning the same via a first outlet opening into a room within which the device is operated, anda second exhaust air duct (63) arranged between the fan means (50) and said filter (13) and for receiving a secondary flow (L2) separated from the volume flow, whereinthe second exhaust air duct (63) communicates with two second outlet openings (32a; 32b), each arranged in the middle partial surface (20a) and adjacent to the lower end of the two outer partial surfaces (20b; 20c),wherein the two second outlet openings (32a; 32b) each are arranged in the form of a slot in the central partial surface (20a) and adjacent to a lower end of a respective outer partial surface (20b; 20c), whereinthe slots each run offset in parallel to the respective inlet opening (30a; 30b) and are such designed that a fluid flow (F2a; F2b) emerging from the second outlet opening (32a; 32b) has an angle of inclination which relative to the horizontal of the middle partial surface (20a) is about 15Ā°.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13003133T PL2677242T3 (en) | 2012-06-20 | 2013-06-19 | Device for extraction of air |
EP13003133.9A EP2677242B1 (en) | 2012-06-20 | 2013-06-19 | Device for extraction of air |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12004642 | 2012-06-20 | ||
EP13003133.9A EP2677242B1 (en) | 2012-06-20 | 2013-06-19 | Device for extraction of air |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2677242A1 EP2677242A1 (en) | 2013-12-25 |
EP2677242B1 true EP2677242B1 (en) | 2020-05-27 |
Family
ID=48628248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13003133.9A Active EP2677242B1 (en) | 2012-06-20 | 2013-06-19 | Device for extraction of air |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2677242B1 (en) |
ES (1) | ES2805314T3 (en) |
PL (1) | PL2677242T3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202013105077U1 (en) * | 2013-11-11 | 2015-02-18 | Silverline KĆ¼chengerƤte Und Handel Gmbh | Hood |
CN106152219B (en) * | 2016-08-19 | 2018-08-31 | å®ę³¢ę¹å¤ŖåØå ·ęéå ¬åø | A kind of oil smoke leading type range hood |
DE202016107354U1 (en) | 2016-12-23 | 2017-03-27 | Berling Aero IP UG (haftungsbeschrƤnkt) | Extractor hood with round inflow area in inclined guide surface |
DE102021106556A1 (en) | 2021-03-17 | 2022-09-22 | Berbel Ablufttechnik Gmbh | extractor hood |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997048479A1 (en) * | 1996-06-19 | 1997-12-24 | Halton Company | Kitchen exhaust system with catalytic converter |
WO2005019736A1 (en) * | 2003-08-13 | 2005-03-03 | Halton Company | Exhaust hood enhanced by configuration of flow jets |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4475534A (en) * | 1978-11-30 | 1984-10-09 | Moriarty Daniel J | Ventilating system for kitchen stove |
DE3718686A1 (en) * | 1987-06-04 | 1988-12-22 | Philips Patentverwaltung | COOKER HOOD, ESPECIALLY FOR KITCHEN |
KR100347959B1 (en) * | 2001-12-28 | 2002-08-21 | Ecta Co Ltd | Ventilation hood for kitchen |
DE10209735A1 (en) * | 2002-03-06 | 2003-09-18 | Manfred H Langner | Extraction method for waste air from kitchens, clean rooms, etc. has fresh air injection nozzle with outlet parallel to guide surface extending to waste air suction intake aperture |
DE10203650A1 (en) * | 2002-10-14 | 2004-04-22 | FĆ¼ner, Thorsten | Procedure for trapping and drawing off of kitchen vapors involves discharging portion of filtered air through nozzle on level with or above vapor sources and then directing it upwards along surface of adhesion as wall jet |
US7699051B2 (en) * | 2005-06-08 | 2010-04-20 | Westen Industries, Inc. | Range hood |
KR100741786B1 (en) * | 2005-08-23 | 2007-07-24 | ģģ§ģ ģ ģ£¼ģķģ¬ | Exhaust hood |
-
2013
- 2013-06-19 EP EP13003133.9A patent/EP2677242B1/en active Active
- 2013-06-19 ES ES13003133T patent/ES2805314T3/en active Active
- 2013-06-19 PL PL13003133T patent/PL2677242T3/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997048479A1 (en) * | 1996-06-19 | 1997-12-24 | Halton Company | Kitchen exhaust system with catalytic converter |
WO2005019736A1 (en) * | 2003-08-13 | 2005-03-03 | Halton Company | Exhaust hood enhanced by configuration of flow jets |
Also Published As
Publication number | Publication date |
---|---|
PL2677242T3 (en) | 2020-11-16 |
ES2805314T3 (en) | 2021-02-11 |
EP2677242A1 (en) | 2013-12-25 |
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