EP3333491A2 - Extractor hood - Google Patents

Abstract

In an extractor hood with an air inlet area (6) and an air outlet area (8), a fine dust filter (10) should be provided between the air inlet area and the air outlet area (8).

Description

Technical area

The present invention relates to an extractor hood according to the preamble of claim 1.

State of the art

Such cooker hoods are already known and widely used in a variety of forms and configurations. Cooker hoods are predominantly used in kitchens, ideally arranged above a hob. These extractor hoods serve in this arrangement, resulting cooking turf by a generated by a motor suction or negative pressure through a filter to the outside by a to the Extract the extractor hood connected air duct or return in recirculation mode back into the room.

Such extractor hoods are for example from the DE 26 54 170 C3 or the DE 22 31 845 C3 known. These have a filter and a suction fan, which suck off the cooking teas produced above the cooking zone and either in Umlauftbetrieb the sucked air through a filter back into the room or through a filter, a so-called grease filter, using a suction fan in an exhaust duct to the outside , The control takes place via one or more step selection buttons or, as in the DE 10 2012 200 286 A1 discloses via menu selections on a hood integrated into the hood with touch technology instead of level selection buttons. The completeness is stated that the screen according to the DE 10 2012 200 286 A1 is used for displaying media content and in this sense also for entering information, which not only serves to control the media content, but can also serve to control the hood itself.

Next most diverse filter systems and filter arrangements for cooker hoods are known. For example, this describes the DE 22 12 770 A the use of a filter version for exhaust and circulating air and the DE 35 29 640 A1 advantageous filter magazine systems consisting of sub-filters for easy filter change during operation.

In the DE 20 2012 104 696 U1 an extractor hood for detecting cooking and baking turf, machine and oven turf and dust and vapor emissions is described which comprises a housing for the components of the air guide and filter device, at least one intake opening therein and a fishing cap, wherein at least one blowing air outlet is provided so that blowing air can be conducted into the immediate intake region of the filter device. From the Treibluftauslass is a targeted directed Treibluftleitstrahl along an air and Wrasenführungsebene led injector-like detection of the vapors in the direction of the intake.

Although the cooker hoods available on the market can filter cooking and baking turf, machine and oven turfs as well as dust and vapor emissions, they are unable to filter, for example, particulate matter in the air and / or ultrafine dust from cooking hobs.

Object of the invention

The object of the present invention is to overcome the disadvantages of the prior art and to provide an extractor hood which makes it possible to supply purified air to a room independently of a cooking operation. In particular, an extractor hood is to be provided, which makes it possible to filter in addition to fat and odor particles further particles from the air or the cooking and baking turf, machine and oven turf and dust and vapor emissions. Furthermore, it should be possible, both in load and in continuous operation as heat recovery element energy-saving the extractor hood, the ambient temperature of a room autonomously regulated by means of heat recovery from cooking and heated air to be dissipated and allows room air filtration and an air supply from the outside.

Solution of the task

To achieve the object, the features of claim 1.

An inventive extractor hood is used in load operation as a fume hood in conventional use for the extraction of cooking turfs during cooking itself.

For the purposes of the invention, cooking hobs and / or steams are considered to be not only the water vapor which may be odoriferous during cooking and / or mist consisting of water and particles but also, in general, particle-laden ambient air of the room itself, in particular allergenic particles.

In the described load operation with an air exchange capacity of up to 500 m ³ air per hour, an extractor according to the invention leads the cooking turf through a grease filter and by means of a motor through an exhaust air duct with a further filter element, in particular an absolute filter in the atmosphere.

Before, during and / or after operation of the extractor hood during load operation, ie generally independent of a cooking operation, at least one embodiment of a fume hood can be operated in a continuous operation with an air exchange rate of up to 100 m ^{3 of} air per hour become. This means that the cooker hood can be run, for example, at level 1, without boiling. The supply air drawn from the outside by means of a motor passes on its way to a room through a supply air duct with a fine dust filter, allowing purified supply air to flow into the room. This is especially for people with allergies or in countries such as China with high air pollution advantage because the room with fresh or purified supply air can be supplied without, for example, a window must be opened.

The exemplary embodiments for extractor hoods according to the present invention have an air inlet area and an air outlet area. One or more grease filters are arranged in the area of the air inlet. The job of the grease filter is to pick up cooking turf and trap fat and dust particles in the filter.
Fleece filters (disposable filters) or metal grease filters (permanent filters) or the like are preferably used.

In addition to the above-mentioned grease filters, there are filterless extractor hoods in which the grease or oil particles and water are separated by centrifugal force from the cooking turf. The intake air is accelerated and diverted in such a targeted manner that water and fat particles are ejected and fall into a drip tray. The drip trays are located at the position where other extractor hoods have their fleece, mesh or labyrinth filter. To remove the residues, the drip trays are wiped out after cooking. In recirculation mode, a hood with a centrifugal filter also uses an activated carbon filter that binds the odor particles.

In the region of the air outlet, an activated carbon filter is preferably arranged. The task of the activated carbon filter is to filter and neutralize odors of the cooking weed. In the exhaust air mode, the fumes released from the grease, with all the moisture and odors, can simply be led outside. In recirculation mode, it must be routed via an odor filter following the grease filter. For this serves the activated carbon filter.

Activated carbon filters in general generally have a cartridge shape and contain a granulate, to which the odors of the cooking wax attach. The activated charcoal granulate consists in its interior of a microfine tangle of channels. As air passes through, the odors are deposited on the walls of these channels.

Instead of conventional activated carbon filters and plasma filters can be used in the shaft of a recirculation hood. With this principle too, fats and very small particles from the cooking process are separated in metal grease filters. In the downstream plasma filter, a high voltage is generated. This results in the air contained in the filter being brought into a "plasma state". The properties of a plasma are predominantly determined by free charge carriers. Are now gaseous, organic Carbon compounds such as odor molecules, but also germs and bacteria are directed into the plasma, so a decomposition and oxidation process is initiated, in which the carbon compounds are either excited to reactions or react directly with the oxygen. If a few odor molecules pass through the plasma filter, they are absorbed by a permanent activated carbon filter. End products of a plasma filter are oxygen, water (humidity) and carbon dioxide.

In the area of the air outlet, a fine dust filter is furthermore arranged. The fine dust filter is preferably arranged downstream of the activated carbon filter in the flow direction of the air. The particulate filter is thus located between the activated carbon filter and the air outlet area.

Other positions of the fine dust filter, before and / or after the plasma and / or the activated carbon filter are conceivable and should be encompassed by the present invention. It is important that the air passes through the fine dust filter on its way to the air outlet area in order to be able to filter the fine dust particles. An arrangement of the fine dust filter in front of the grease filter (metal filter) should also be considered, but would make no sense, since the particulate matter filter would then be saturated immediately.

The task of the particulate matter filter is again to filter fine dust particles previously present in the cooking process before the air passes through the air outlet area to the outside or back into the room.

As fine dust, the dust is called, whose grain size is smaller than 10 microns. The health effects of particulate matter and ultrafine dust in particular (less than 0.1 micrometer) are the subject of numerous research projects at home and abroad.

Fine dust sources are mainly the industry, road traffic with its exhaust gases, abrasion of propulsion systems, brake systems, tires, Road surface and uplift of road dust, air, ship and rail traffic as well as agriculture. But private households contribute not insignificantly to the formation of particulate matter. Indoor sources of fine dust include heaters, laser printers, photocopiers, candles, cooking activities and vacuum cleaners without filters.

A motor and ventilation unit inside the extractor hood serves to extract air and cooking turf from above the hob. The engine and ventilation unit can preferably be controlled and regulated in several stages. However, this is of minor importance in the present case.

The present invention should also encompass ventilation and air-conditioning systems which can be used with an extractor hood or separately. The air purifier is also equipped with a fine dust filter. The air is sucked in through one or more axial fans via the air inlet area inside and passes here first a plasma filter. The electronics of the plasma filter is activated by the flow of exhaust air. The contaminated exhaust air (fats, odors, etc.) is converted into pure air and CO2 by means of a natural reaction. The activated carbon filter is used here as a storage medium to collect still existing odor particles. The filtered clean air is then returned through the air outlet area back out into the room, the air passes before the fine dust filter.

However, the invention is not dependent on the use of plasma filters or the like.

The air cleaning device is preferably connected to a socket, which are charged in the air cleaning device located batteries. In this way, the air purifier can be used independently of a power outlet in other rooms and filter the air there.

For the present invention, it is irrelevant to what kind of hood it is, whether under construction equipment, built-in appliances, intermediate equipment, fan components, design hoods, sloping wall hoods, skip ventilators, retractable extractor hoods, table covers, ceiling ventilation or the like, whether in Umufuftbetriebe or exhaust air operation or in combination, whether with one or more filters (grease and / or activated charcoal and / or plasma filters), whether with an additional air purifier or without an additional air purifier. The type of extraction of the air / Wrasens, whether surface extraction, Randabsaugung or Mehrzonenrandabsaugung is also of minor importance.

The fine dust filter is intended to be used much more in any kind of extractor hood and in any kind of air purifier.

Another embodiment of an inventive extractor hood comprises a hood screen, a tower and a connection module. Furthermore, an extractor according to the invention has separate exhaust air and supply air chambers. The separation of the air duct takes place in the tower of the hood itself, as in the tower, the lower two-thirds, which have the exhaust chamber separated by an intermediate ceiling of an upper third of the tower, which has the Zuluftkammer. For supplying supply air into the room, a supply air chamber opening and, ideally, openings of any desired contour geometry, such as slots or holes, are provided in the tower or in the supply air chamber. In the exhaust chamber, an exhaust duct is further provided, which not only passes through the exhaust chamber, but also the Zuluftkammer to avoid mixing of exhaust air and supply air and still be able to transport the exhaust air to the outside.

The exhaust duct further has an inlet opening through which exhaust air provided with cooking turfs can flow out of the region of the hob through the grease filter into the exhaust air duct. Furthermore, the exhaust duct has a Outlet opening, through which exhaust air can be transported to the outside or in the direction of a connection module.

The connection module preferably connects via hoses to the supply air chamber of the tower. For this purpose, the connection module has a housing with an exhaust air inlet opening and a supply air outlet opening which is connected via the hoses or any other conceivable connection elements to the outlet opening of the exhaust air duct or the supply air chamber opening of the supply air chamber.

Furthermore, the connection module has an exhaust air outlet opening and an air inlet opening.

The exhaust air duct together with the outlet opening, the exhaust air inlet opening and the exhaust air outlet opening forms an exhaust air duct. The supply air chamber, together with the supply air chamber opening, the supply air outlet opening and the supply air inlet opening, form a supply air duct.

Furthermore, the connection module approximately centrally in its housing between the exhaust air inlet opening and the Zuluftauslassöffnung and the Abluftauslassöffnung and the Zulufteinlassöffnung on a controllable heat exchanger. The heat exchanger should ensure the exchange of heat energy between the exhaust air and the supply air. In this case, the heat exchanger quite within the meaning of the invention can both give off heat and absorb heat and thus both actively warm air or extract the heat and thus achieve a cooling function, in particular the cooling of the supply air or a warming function, in particular the heating of the supply air ,

However, it should be noted at this point that the extractor hood and the connection module can be produced without a heat exchanger. This possibility should also be of the to be included in the present invention. This case is especially in countries with warmer climates, which do not require a heat exchanger, but only use the hood to exchange the room air and the room with sucked pre-cleaned supply air, ie supply outside air.

In the housing, a motor is preferably arranged on both sides of the heat exchanger. The one engine draws warm exhaust air, enriched with cooking turf from the area of the space above the hob through the exhaust duct and then through the activated carbon filter in the housing. The warm air is then discharged past the heat exchanger or, depending on the embodiment of the heat exchanger, through it to the exhaust air outlet opening and from here into the atmosphere.

The other motor on the opposite side of the heat exchanger draws (cold) air from the atmosphere through the Zulufteinlassöffnung in the housing, the air flows through a fine dust filter.

The supply air is passed after passing through the fine dust filter on the heat exchanger or depending on the embodiment of the heat exchanger through it through the Zuluftauslassöffnung, passes from there through the Zuluftkammeröffnung in the supply air chamber and from there through the slots in the room in which the extractor hood is located.

The heat exchanger according to the invention comprises a storage medium for energy in the form of heat, one or more sensors not shown in detail for detecting both the ambient temperature of the atmosphere and the ambient temperature of the room in which the hood is located and possible other sensors in adjacent and / or neighboring rooms. Other sensors are for an increase in temperature comfort quite within the scope of the invention possible. Likewise, particle and / or humidity and gas analysis sensors are conceivable.

The heat exchanger is further arranged such that between the exhaust air and the supply air no exchange of air and only a controllable heat exchange between the warm, discharged from the room into the atmosphere exhaust air and supplied from the atmosphere into the room, cold air takes place.

Furthermore, the hood is associated with a not shown in detail autonomous control and control unit for controlling supply air and / or exhaust air. Ideally, the control and regulation unit can be connected to a cooking device via an electrical signal line, so as to obtain a pulse for switching from continuous operation to load operation. In connection with sensors, which detect a use of the cooking device on emerging Kochwrasen, such an embodiment of the inventive extractor hood also autonomously supply and / or exhaust control and / or control.

Due to the sensor-controlled and / or controlled exhaust air or supply air duct, the extractor hood can serve not only in load operation during cooking, but also in continuous operation as energy-saving self-regulating room air filtration and / or room air heater and / or cooling.

As far as the sensors are concerned, they can continuously detect both the outside temperature of the ambient air in the atmosphere and the temperature of the cooking hob and the temperature of the ambient air in the room in which the cooker hood is located. This serves the purpose of capturing and buffering the thermal energy of the cooking turf through the heat storage of the heat exchanger at the bypass of the exhaust air at temperature differences between the ambient air of the atmosphere and the room.

The sensors used here for the regulation and / or control of the extractor hood can be temperature sensors and ideally also moisture and / or gas sensors as well as particle sensors and the like, in order thus to detect a large number of control and / or control variables.

This provides the user with the highest possible level of comfort through a comprehensive analysis of the air to be discharged and / or supplied and the control and / or control measures of the control and / or control unit acting autonomously in continuous operation by the detected control and / or control variables Provided.

In particular, an embodiment with particle sensors of an inventive extractor hood contributes to an energy-saving filtering of allergenic particles from the air and thus increases the comfort of allergy sufferers.

It should also be encompassed by the present invention not only to regulate or control the extractor hood autonomously by means of a control and / or control unit designed for this purpose, but also manually.

In operation, heating of the air through the heat exchanger may or may not occur depending on the autonomous control and regulation unit or by manual control and / or control of the extractor hood. Depending on the temperature difference between the ambient air of the room and the ambient air of the atmosphere and / or the temperature of the cooking and / or selected setting on the control and regulation unit, it may be to a cooling or heating of the ambient air of the room by dissipating in the heat accumulator Heat exchanger stored energy come.

Thus, an extractor hood in continuous operation outside the selected during cooking load operation for continuous room air filtration and / or supply of particle-free fresh air from the atmosphere into the room and / or cooling and / or heating the discharged or supplied air with an advantageous heat recovery from the discharged air and heat supply to the supplying air through the heat exchanger.

figure description

• Figur 1 eine Vorderansicht eines Ausführungsbeispiels eines erfindungsgemässen Dunstabzugs;
• Figur 2 eine Schnittansicht durch die Dunstabzugshaube nach Figur 1 entlang der Linie II - II;
• Figur 3 eine Seitenansicht eines weiteren Ausführungsbeispiels eines Dunstabzugs gemäss der vorliegenden Erfindung;
• Figur 4 eine Schnittansicht durch die Dunstabzugshaube nach Figur 3 entlang der Linie IV - IV;
• Figur 5 eine Vorderansicht eines weiteren Ausführungsbeispiels eines Dunstabzugs gemäss der vorliegenden Erfindung;
• Figur 6 eine Schnittansicht durch die Dunstabzugshaube nach Figur 5 entlang der Linie VI - VI;
• Figur 7 eine Vorderansicht eines Luftreinigungsgerätes gemäss der vorliegenden Erfindung;
• Figur 8 eine Schnittansicht durch das Luftreinigungsgerät nach Figur 7 entlang der Linie VIII - VIII;
• Figur 9 eine perspektivische Ansicht eines weiteren Ausführungsbeispiels eines erfindungsgemässen Dunstabzugs;
• Figur 10 eine perspektivische Ansicht des erfindungsgemässen Dunstabzugs mit gestrichelten Linien;
• Figur 11 einen Querschnitt durch den Dunstabzug nach den Figuren 9 und 10 entlang der Linie XI - XI in der Figur 9;
• Figur 12 eine perspektivische Ansicht eines Anschlussmoduls an den Dunstabzug nach Figur 9; und
• Figur 13 eine Seitenansicht des Anschlussmoduls nach Figur 12.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings; these show in:

• FIG. 1 a front view of an embodiment of an inventive extractor hood;
• FIG. 2 a sectional view through the hood after FIG. 1 along the line II - II;
• FIG. 3 a side view of another embodiment of a fume hood according to the present invention;
• FIG. 4 a sectional view through the hood after FIG. 3 along the line IV - IV;
• FIG. 5 a front view of another embodiment of a fume hood according to the present invention;
• FIG. 6 a sectional view through the hood after FIG. 5 along the line VI - VI;
• FIG. 7 a front view of an air cleaning device according to the present invention;
• FIG. 8 a sectional view through the air cleaning device according to FIG. 7 along the line VIII - VIII;
• FIG. 9 a perspective view of another embodiment of an inventive extractor;
• FIG. 10 a perspective view of the inventive extractor with dashed lines;
• FIG. 11 a cross section through the extractor after the Figures 9 and 10 along the line XI - XI in the FIG. 9 ;
• FIG. 12 a perspective view of a connection module to the extractor after FIG. 9 ; and
• FIG. 13 a side view of the connection module after FIG. 12 ,

embodiment

The Figures 1 and 2 show a vertical extractor 1.1, which in this case has the form of an envelope and which is arranged over a cooktop not shown in detail.

A front face 2 of the extractor hood 1.1 comprises a guide area 3 and a take-off area 4. The guide area 3 and the take-off area 4 are preferably arranged movably relative to one another. To obtain a position of use, the withdrawal region 4 is preferably pivoted upwards, ie in the direction of an arrow 5, as in FIG. 2 is shown. A pivoting of the draw-off region 4 can be effected in a conventional manner, for example via a gas spring not shown in detail, hydraulically, pneumatically, electrically or the like.

By pivoting the trigger area 4 in the direction of the arrow 5 upwards, an air inlet area 6 is accessible and one or more behind this arranged fat filter 7.1. The job of the grease filter is to pick up cooking turf and trap fat and dust particles in the filter. used are preferred nonwoven filter (disposable filter) or metal grease filter (permanent filter) or the like.

The grease filter 7.1 is in operative connection with an air outlet region 8. In the area of the air outlet area 8, an activated carbon filter 9 is furthermore preferably connected downstream, i. in the flow direction of the air, and after the activated carbon filter 9, a fine dust filter 10.1 is arranged. The task of the activated carbon filter 9 is to filter and neutralize odors of the cooking weed. The task of the particulate matter filter 10.1 is to filter particulate matter still present in the cooking process before the air passes through the air outlet region 8.

An engine and ventilation unit 11 in the interior of the extractor 1.1 is used for the extraction of air and cooking turf from above the hob. The engine and ventilation unit 11 is preferably controllable and controllable in several stages.

• Wird auf dem Kochfeld unterhalb des Dunstabzugs 1.1 gekocht, so steigt Abluft bzw. Kochwrasen nach oben in Richtung des Dunstabzugs 1.1. Mittels Betätigen nicht näher gezeigter Bedien- und Funktionselemente zur Steuerung des Dunstabzugs 1.1 bzw. der Motor- und Ventilationseinheit 11 im Inneren des Dunstabzugs 1.1 wird der Dunstabzug 1.1 aktiviert.

The operation of this embodiment is the following:

• If you cook on the hob below the extractor hood 1.1, the extract air or cooking turf rises upwards in the direction of the extractor hood 1.1. By means of actuating not shown in detail operating and functional elements for controlling the extractor 1.1 and the engine and ventilation unit 11 inside the extractor 1.1, the extractor 1.1 is activated.

By actuating the operating and functional elements, the extraction area 4 can furthermore be pivoted upwards so that the filter 7.1 arranged behind it becomes visible and accessible. The exhaust air or cooking turf passes through the filter 7.1, where first fat components of the cooking turfs are filtered. Then the exhaust air or Kochwrasen flows through the activated carbon filter 9, where an odor filtration or neutralization takes place. Remaining fine dust particles are then passed through the adjoining Fine dust filter 10.1 filtered, from where the air then passes in the direction of the air outlet 8 and from there in a manner not shown in detail to the outside.

If the extractor 1.1 is no longer needed, the take-off area 4 is simply pivoted back down.

In the FIGS. 3 and 4 a horizontal extractor 1.2 is shown. In the FIGS. 5 and 6 an extractor hood 1.3 integrated in a hob is shown, ie a so-called tray ventilator. In these further embodiments of one is less about describing the operation and the nature and design of the extractor itself. It is rather to show that any type of extractor, whether horizontal, vertical or in a plane with the hob, whether recirculation or exhaust air operation can be provided with such a fine dust filter 10.1.

Therefore, the individual embodiments are not described in detail, but it is assumed that the same reference numerals designate the same elements, so that the above statements and disclosures also to elements of FIGS. 3 and 4 and 5 and 6 are to be read with the identical reference numerals.

In the FIGS. 7 and 8 however, an air cleaner 12 is shown. By this embodiment, it should be clarified that the fine dust filter 10.1 can and should also be used in such devices. Air is sucked in through one or more axial fans 13 via the air inlet portion 6 to the inside and passes here first a plasma filter 14. The electronics of the plasma filter 14 is activated by the flow of exhaust air. The contaminated exhaust air (fats, odors, etc.) is converted into pure air and CO2 by means of a natural reaction. The activated carbon filter 8 is used here as a storage medium to collect still existing odor particles. The filtered clean air is then passed through the air outlet area 8 returned back to the outside in the room, the air passes before the fine dust filter 10.1.

According to the FIGS. 9 to 11 a further embodiment of a fume hood 1.4 is shown, which has a hood screen 15 and a tower 16. The hood screen 15 serves to receive one or more grease filters 7.2. The tower 16 has in its interior in the lower two-thirds an exhaust chamber 17 and in its upper third a supply air chamber 18, on. This arrangement is used to separate the air duct depending on the exhaust air or supply air.

The exhaust chamber 17 of the tower 16 is separated by an intermediate ceiling 20 of the supply air chamber 18 of the tower 16, but within the exhaust chamber 17 and the supply air chamber 18, an exhaust duct 21 for guiding the exhaust air from a region of a cooking field not shown here is provided to the outside.

The exhaust air duct 21 has an inlet opening 40 through which exhaust air provided with cooking turfs can flow out of the region of the hob through the grease filter 7.2 into the exhaust air duct 21. Furthermore, the exhaust air duct 21 has an outlet opening 22, through which exhaust air following an arrow 24 to the outside or in the direction of one in the Figures 12 and 13 shown connection module 26 can be transported.

The supply air chamber 18 of the tower 16 serves to guide supply air into a room. For this purpose, the tower 16 or the supply air chamber 18 has an inlet opening 23 through which supply air, following an arrow 25, enters the supply air chamber 18 and can flow out through slots 19 in the supply air chamber 18 or the tower 16 into the space.

To the supply air chamber 18 of the tower 16 of the extractor 1.4, the connection module 26 connects. The connection module 26 has a housing 27, which has in the direction of the tower 16 of the extractor hood 1.4 via an exhaust air inlet opening 28 and a Zuluftauslassöffnung 29. The exhaust air inlet opening 28 and the Zuluftauslassöffnung 29 are connected in the position of use via hoses not shown in detail with the Abluftauslassöffnung 31 of the exhaust duct 21 and the Zuluftkammeröffnung 23 of the supply air chamber 18.

Towards an outer wall 30, i. On one of the exhaust air inlet opening 28 and the Zuluftauslassöffnung 29 opposite side, the housing 27 of the connection module 26 is provided with a Abluftauslassöffnung 31 and a Zulufteinlassöffnung 32.

The exhaust air channel 21 forms, together with the outlet opening 22, the exhaust air inlet opening 28 and the exhaust air outlet opening 31, an exhaust air duct 38. The supply air chamber 18 forms, together with the supply air chamber opening 23, the supply air outlet opening 29 and the air inlet opening 32, a supply air duct 39.

Furthermore, the housing 27 of the connection module 26 approximately centrally between the exhaust air inlet opening 28 and the Zuluftauslassöffnung 29 and the Abluftauslassöffnung 31 and the Zulufteinlassöffnung 32 a controllable heat exchanger 33. The heat exchanger 33 is to ensure the exchange of heat energy between the exhaust air and the supply air. In this case, the heat exchanger 33 quite within the meaning of the invention both give off heat and absorb heat and thus both actively heat air or the air withdrawing heat and thus a cooling function, in particular the cooling of the supply air or a warming function, in particular the heating of the supply air achieve.

In the housing 27 of the connection module 26, a motor 34 or 35 is preferably arranged on both sides of the heat exchanger 33. The motor 34 draws warm exhaust air, enriched with cooking fumes from the area of the space above the hob by the exhaust duct 21 and then by a Filter element 36, in particular an absolute filter in the region of the exhaust air inlet opening 28 in the housing 27. The warm air is then past the heat exchanger 33 or depending on the embodiment of the heat exchanger 33 therethrough to the exhaust outlet 31 and from here to the atmosphere on the other Side of the outer wall 30 delivered. For this purpose, electrical closure caps (not shown in more detail) are preferably provided between the housing 27 and the exhaust air outlet opening 31, which are intended to prevent unwanted discharge or inflow of exhaust air. The guidance of the exhaust air is preferably carried out in the direction of the arrows 41.

The motor 35 on the opposite side of the motor 34 of the heat exchanger 33 draws (cold) air from the atmosphere through the Zulufteinlassöffnung 32 in the housing 27, wherein the air in this case arranged in the vicinity of the Zulufteinlassöffnung 32 filter element 10.2, in particular flows through a fine dust filter. The supply air is preferably guided in the direction of the arrows 42. Also, electrical closing caps, which are not shown in greater detail, are preferably provided between the housing 27 and the air intake opening 32, which are intended to prevent an unintentional inflow or outflow of supply air.

The supply air is passed after passing through the filter element 10.2 on the heat exchanger 33 or depending on the embodiment of the heat exchanger 33 therethrough through the Zuluftauslassöffnung 29, passes from there through the Zuluftkammeröffnung 23 in the supply air chamber 18 and from there through the slots 19th into the room where the extractor 1.4 is located.

The heat exchanger 33 in the context of the invention comprises a storage medium for energy in the form of heat, one or more sensors not shown in detail for detecting both the ambient temperature of the atmosphere and the ambient temperature of the room in which the extractor 1.4 is located and possible other sensors in adjacent and / or neighboring rooms. Other sensors are quite possible for increasing the temperature comfort within the scope of the invention. Likewise, particle and / or humidity and gas analysis sensors are conceivable.

Furthermore, the extractor 1.4 is assigned a not shown in detail control and regulation unit for controlling supply air and / or exhaust air.

Although only a few preferred embodiments of the invention have been described and illustrated, it is apparent that one skilled in the art can add numerous modifications without departing from the spirit and scope of the invention. <B> LIST OF REFERENCES </ b> 1 extractor 34 engine 2 front surface 35 engine 3 guide region 36 filter element 4 removal area 37 5 arrow 38 exhaust air 6 Air intake area 39 supply air 7 grease filter 40 inlet port 8th air outlet 41 arrow 9 Activated carbon filter 42 arrow 10 Feinstaubfilter 43 11 Motor and ventilation unit 44 12 Luftreiniqungsgerät 45 13 axial fan 46 14 plasma filter 47 15 hood screen 48 16 tower 49 17 exhaust chamber 50 18 supply air 51 19 slots 52 20 false ceiling 53 21 exhaust duct 54 22 outlet 55 23 Zuluftkammeröffnung 56 24 arrow 57 25 arrow 58 26 connection module 59 27 casing 60 28 Air inlet port 61 29 Zuluftauslassöffnung 62 30 outer wall 63 31 Abluftauslassöffnung 64 32 Zulufteinlassöffnung 65 33 heat exchangers 66

Claims (16)

Extractor hood with an air inlet area (6) and an air outlet area (8),
characterized,
in that a fine dust filter (10.1) is provided between the air inlet area and the air outlet area (8). Extractor hood according to claim 1, characterized in that the fine dust filter (10.1) is arranged downstream of a grease filter (7.1) and an activated carbon filter (9). Extractor hood according to claim 2, characterized in that the grease filter (7.1) is provided in the region of the air inlet region (6). Extractor hood according to claim 2 or 3, characterized in that the activated carbon filter (9) in the region of the air outlet region (8) is provided. Extractor hood according to claim 1, characterized in that the fine dust filter (10.1) is arranged downstream of a plasma filter (14) and an activated carbon filter (9). Extractor hood with a guide (38) for exhaust air, characterized in that a guide (39) is provided for supply air. Extractor hood according to claim 6, characterized in that the exhaust air duct (38) and the supply air duct (39) are each assigned a filter element (36, 10.2). Extractor hood according to claim 7, characterized in that the filter element (36) is an absolute filter and the filter element (10.2) is a fine dust filter. Extractor hood according to one of the preceding claims, characterized in that the exhaust air duct (38) has a motor (34). Extractor hood according to one of the preceding claims, characterized in that the supply air guide (39) has a motor (35). Extractor hood according to claim 10, characterized in that the motor (35) of the supply air duct (39) is equal to or stronger than the motor (34) of the exhaust duct (38). Extractor hood according to one of the preceding claims, characterized in that a heat exchanger (33) is provided, through which heat energy of exhaust air for heating supply air is available. Extractor hood according to one of the preceding claims, characterized in that the heat exchanger (33) and / or the motors (34, 35) in a connection module (26) are arranged. Extractor hood according to one of the preceding claims, characterized in that the exhaust air duct (38) may comprise an exhaust air duct (21) and an outlet opening (22), an exhaust air inlet opening (28) and an exhaust air outlet opening (31). Extractor hood according to one of the preceding claims, characterized in that the supply air guide (39) may comprise an inlet air chamber (18) and a Zuluftkammeröffnung (23), a Zuluftauslassöffnung (29) and a Zulufteinlassöffnung (32). Use of an extractor hood (1.1, 1.2, 1.3, 1.4) as a ventilation system.

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