Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C15/00—Details
  • F24C15/20—Removing cooking fumes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; 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 an extractor hood, which has a housing, with a fan arranged therein and a suction opening for the entry of fumes into the extractor hood on the underside of the extractor hood.
• DE 41 14 329 A1 proposes an extractor hood in which an air curtain is produced in the edge region.
• the circulating air of the fan that is, the air discharged from the fan can be used.
• the air curtain can be generated from the ambient air of the hood.
• the extractor hood has an additional fan on the front of the hood, which generates the air flow.
• a disadvantage of this extractor hood is that a relatively large volume flow must be diverted from the circulating air for the use of the circulating air of the blower.
• the use of an additional blower increases the complexity of the construction of the cooker hood, because a separate auxiliary blower is necessary, which leads to increased energy consumption and increased noise generation.
• DE 196 13 513 A1 discloses a method for confining, detecting and suction of vapor, dust or the like and a device for carrying out the method known.
• this method for use with cooker hoods proposed to direct an air flow over a curved surface, wherein the air flow through blow-out is discharged, which are directed towards a located below the hood cooker.
• the Ausblaskanäle are provided on the front of the hood or on the underside.
• a disadvantage of this known system is that the exhaust duct and the curved surface together determine the height of the hood in the area of the delivery of the air curtain.
• EP 1 757 865 A2 describes an extractor hood in which a nozzle unit is provided on the front side of the main body of the extractor hood, which is provided with a curved area and a nozzle.
• the nozzle is here provided at the top of the curved portion to output air in the horizontal direction to the front of the curved portion.
• a disadvantage of this extractor hood is that it can lead to annoyance of the user of the hood by the horizontal discharge of air from the nozzle on the one hand.
• the air flow guided at the curved area can be sucked into the suction opening of the extractor hood immediately after leaving the curved area.
• below the curved area outwardly flowing vapors can not be reliably sucked in by this extractor hood.
• the invention is therefore an object of the invention to provide a cooker hood, which allows a reliable extraction of fumes in a simple structure.
• the invention is based on the finding that this object can be achieved by generating an air curtain from the top of the vapor shield.
• an extractor hood having a housing with a fan arranged therein and a suction opening for the entry of fumes or vapors in the hood at the bottom of the Extractor hood has.
• the extractor hood is characterized in that at least one air outlet gap is provided in the upper side of the extractor hood in at least part of the edge region of the extractor hood, which adjoins a curved surface in the direction of the underside of the extractor hood.
• the suction opening As the suction opening is referred to in the sense of this invention, the inlet opening, enter through the fumes in the hood.
• the side of the hood and in particular a Wrasen- or sight screen of an extractor hood is called, which is the side of the hood, where the suction opening is provided opposite.
• the air outlet gap is designed so that an air flow is discharged through it in a direction having a vertical direction component which is greater than zero.
• the air flow has an upward directional component.
• the Lucasauslassspalt may be provided for this purpose at a suitable location on the hood.
• such a directed air flow can be realized by a suitable geometry of the air outlet gap and / or an air channel leading to this.
• the airflow that can be generated by the present invention differs from airflows that are applied in a horizontal direction to a curved surface.
• an air flow can be generated which forms a tear-off edge on the front or on the underside of the curved surface, that is, at this point separates from the curved surface. It is thus possible to produce a directed to a arranged below the hood cooker or worktop air curtain and a direct entry of the air jet from the curved surface in the suction of the hood can be avoided.
• the top surface in which the air outlet gap is provided lies in a horizontal plane which lies in or parallel offset below the plane in which the highest point of the curved surface is located.
• This arrangement of the air outlet gap along the targeted guidance of the air flow the curved surface reliably achieved over the desired distance.
• the air flow is deflected in this embodiment when hitting the curved surface or immediately before hitting the curved surface of a generally horizontally extending air duct within the hood. By this deflection, the air flow is guided along the curved surface and premature tearing of the air flow from the curved surface can be prevented.
• an air flow is generated which extends from the top of the extractor hood to the underside of the extractor hood. From the bottom of the cooker hood, the airflow generates an air curtain around vapors, which rises from a hotplate located below the extractor hood. The lateral escape of Wrasens can be prevented.
• the curved surface is provided according to the invention to direct the exiting at the top of the hood airflow to the front or bottom of the hood, from which the air flow is directed in the form of an air curtain on a arranged below the hood cooker or on an area around the cooking area ,
• the direction of the air flow to the front or underside of the hood is not meant in particular an immediate introduction of the air flow into the suction opening of the extractor hood. Rather, the air flow separates from the curved surface and forms a veil that extends substantially vertically downwards.
• the length of the air flow at the curved surface is increased.
• the increased length of the airflow at the surface of the curved surface may minimize the original volume flow from the air outlet gap required to create the air curtain that is exhausted from the hood.
• the provided on the top of the hood air outlet gap is not visible to the user, which improves the visual appearance of the hood.
• a guided around the curved surface channel which leads to an increased height of the hood at least in the region of the air outlet gap, in particular in the edge region of the hood, is not required in the present invention.
• the overall height of the hood can be reduced.
• a nuisance to the user of the hood is not to be feared in an upward emerging from the top of the hood air jet, which hugs a curved surface.
• the air outlet gap is preferably provided on an air duct which extends from the fan of the extractor hood to at least one edge region of the extractor hood.
• the controlled domestic ventilation and thus the heat demand in the kitchen environment is not influenced by the air curtain.
• the air duct can be connected directly to the fan or the surrounding fan housing.
• the air duct may also be connected to an exhaust duct in which air is transported away from the blower housing, thus directing a portion of the air sucked in by the blower to the air outlet gap.
• the curved surface adjacent to the air outlet gap is a lateral outer surface of the extractor hood, in particular the outer edge of the extractor hood, in particular a vapor shield of the extractor hood.
• an outer surface of the extractor hood as a curved surface for guiding the airflow, the ambient air comes into contact with the curved surface at which the airflow is directed. This is advantageous since more ambient air can thus be absorbed into the air stream via a large length of the air stream due to the arrangement of the air outlet gap at the top of the extractor hood.
• the mass flow to be delivered as air curtain around or to the cooking surface increases and improves the shielding effect of the vapor or the line of Wrasens from the cooking surface to the suction port of the hood.
• At least one operating element for operating the extractor hood is provided in the inventive extractor hood on the curved surface.
• This arrangement of the at least one control element can be realized in the inventive design of the hood, as intended at the front of the hood and in particular the Wrasenles on which the controls are usually mounted, a trailing edge of a guided over the curved surface air flow, or at least acceptable is. From this position, the air flow with ambient air as an air curtain directed downward can continue.
• an arrangement of operating elements on the curved surface is not possible.
• the gap width of the air outlet gap is preferably set as a function of the radius of curvature of the curved surface.
• the trailing edge of the air flow from the curved surface is preferably set at a position spaced from the lowermost point of the curved surface. This position is facing away from the suction opening of the extractor hood, so that an immediate introduction of the generated air flow into the suction opening of the extractor hood can be avoided.
• a negative pressure arising at the curved surface in the vicinity of the air outlet gap can be adjusted.
• Under pressure is caused to the pure entrainment of ambient air through the guided on the curved surface air flow additional intake of ambient air into the air flow.
• the mass flow forming the air curtain below the extractor hood is additionally increased or the volume volume of conditioned air required for generating the mass flow through the air outlet gap is reduced.
• the extractor hood has an edge element, in particular a tubular edge element, which forms the curved surface, at which the air flow is conducted out of the air outlet gap.
• an edge element which can be manufactured separately from the other components of the extractor hood, it becomes possible to produce this edge element in the material required for optical or other purposes. Due to the design of the edge element as a pipe, this can reduce the overall weight of the extractor hood over the use of a solid cylinder.
• the edge element can serve to accommodate further components, such as lighting elements or the actuators for the above-mentioned controls.
• the air outlet gap is limited in one embodiment by the curved surface and a cover of the top of the hood, wherein the cover of the top of the hood is in the plane of the highest point of the curved surface or below the plane of the highest point of the curved surface.
• the overall height of the extractor hood in the edge region in particular in the edge region of the vapor shield or the viewing hood, be minimal.
• the total height is determined exclusively by the radius of the curved surface.
• the hood can also be given a uniform appearance, that is, at low overall height no paragraphs are provided at the top of the hood in the edge region.
• the cover of the hood which forms the Luftauslassspalt together with the curved surface, the Cover of a vapor shield or the viewing hood of an extractor hood.
• a cover is provided with cooker hoods, especially when eating as a sheet.
• the suction opening of the extractor hood is offset upwards relative to the underside of the curved surface.
• the suction opening of the extractor hood is offset upwards relative to the underside of the curved surface.
• the extractor hood has at least one side profile, the lower end of which lies in the same plane as the underside of the curved surface.
• the hood can be given a uniform appearance.
• the lateral boundary of the space below the suction opening can improve the supply of vapor to the suction opening.
• the side profile can be designed as a sheet or represent another curved surface.
• At least one air-guiding element is provided in the air-guiding duct from the fan to the edge region at the air outlet gap.
• the air guide element serves to align the air in the air guide channel so that the air flow leaving the air outlet gap is securely guided on the curved surface.
• the air guide element may in particular be provided at the outlet of the air duct, that is to say in the immediate vicinity of the air outlet gap.
• the air guide element is particularly preferably designed so that this reduces the cross section of the air duct at the outlet of the air duct. In this way, the formation of an air flow can be ensured even at low flow velocity in the air duct.
• the air guiding element serves to direct the air flow emerging from the air outlet gap in a direction which has at least one vertical directional component.
• the extractor hood according to the invention may represent a wall-mounted hood, a Wandesse or Glassesse.
• air outlet gaps are provided at one or more edge regions.
• an air outlet is preferably provided at the front in the edge region at the top of the hood.
• a Wandesse can be provided on the three free sides, that is, on the sides where the counter is not attached to the wall, or also only on the front of the Wandesse on the top, Beerauslassspalte.
• air outlet gaps are preferably provided on all four edge regions in the upper side of the extractor hood, in particular of the vapor shield of the extractor hood.
• FIG. 1 shows a schematic sectional view of an embodiment of the extractor hood according to the invention
• FIG. 2 shows a schematic detail of the air outlet gap of the extractor hood
• FIG. 3 shows a schematic representation of a further embodiment of the extractor hood according to the invention.
• FIG. 4 shows a schematic sectional view of a further embodiment of the extractor hood according to the invention
• FIG. 5 shows a schematic plan view of the embodiment of the extractor hood according to FIG. 3.
• the extractor hood 1 has a housing 2.
• a blower 3 is provided, via which a negative pressure is generated.
• a vapor shield or a viewing hood 4 is provided at the bottom of the housing 2. Via the interior 5 of the vapor shield 4 sucked air can reach the blower 3 in the housing 2. In the bottom 6 of the vapor shield 4 there is a suction opening 7. About this suction opening 7, in which a filter element 8 is provided in the illustrated embodiment, are fumes from below the hood 1 in the interior 5 of the vapor shield 4 and above to the blower. 3 the extractor hood 1 passed.
• an exhaust air duct 9 ' is provided, via which air which has been sucked in by the blower 3 can be discharged to the outside, for example via an exhaust pipe. Furthermore, the blower 3 is connected to air ducts 9, which transport air from the blower 3 via the vapor shield 4 to the edge region 10 of the extractor hood 1, in particular of the vapor shield 4.
• the air ducts 9 may be provided on the fan 3 or its fan housing itself or on the exhaust duct 9 '.
• the end of the air channels 9, which lies in the edge region 10 of the vapor shield 4 is formed by an air outlet gap 11.
• the air outlet gap 1 1 is arranged on the upper side 12 of the vapor shield or the viewing hood 4.
• This air outlet gap 11 is delimited on the side facing the housing 2 by a metal sheet 13 substantially covering the top side 12 of the vapor shield 4.
• the edge 10 of the vapor shield 4 facing side of the Heilauslassspaltes 11 is formed by the lateral surface 14 of a substantially tubular rim member 15.
• FIG. 2 The structure of the air outlet gap 11 and the edge region 10 of the extractor hood 1 is shown in Figure 2 in a schematic detail view. As can be seen from FIG. 2, the highest point 141 of the lateral surface 14 is arranged in the same plane as the plate 13, which defines the upper side 12 of the vapor shield 4.
• the treated air transported via the air duct 9 to the air outlet gap 11 is discharged from the extractor hood 1 through the air outlet gap 11.
• the air flow 16 is here at the air outlet slit 1 1 directed out of the horizontal upwards.
• the air flow 16 emerging from the air outlet gap 11 is directed onto the jacket surface 14 of the edge element 15, the air flow 16 is applied to the jacket surface 14.
• the air flow 16 remains due to the so-called Coanda effect on the mantle surface 14 and dissolves only at a trailing edge 17 of the mantle surface 14.
• the tear-off edge 17 is offset in the illustrated embodiment to the center of the edge element 15 to the outside.
• the air flow 16 unfolds due to vortex formations an air curtain 18.
• the air curtain 18 is directed at the demolition edge 17 indicated in Figure 2 on the area below the hood 1. If the tear-off edge 17 is offset further outwards, the orientation of the air curtain 18 can approach the vertical.
• the air curtain 18 is passed from the hood 1 to the located below the hood 1 hotplate or in an area immediately around the hob. Once the air curtain 18 reaches the hotplate, this will heat up together with rising vapor and promote the transport of the mist to the suction port 7 of the hood 1 by this temperature change.
• the edge 11 1 of the Luftauslassspaltes 1 1 which is formed by the edge of a cover or a sheet 13 which covers the top 12 of the vapor shield 4, designed aerodynamically optimized.
• an air guide element 19 is provided on the edge 11 1.
• the air guiding element 19 can be formed by bending over the end of the metal sheet forming the cover 13 in the direction of the interior 5 of the vapor shield 4 or into the air duct 9. But it is also possible to use other air guide elements.
• an air guide element 19 a supply to the air outlet gap 1 1 is provided at the end of the air duct 9, through which the air flow 16 is targeted.
• the air duct 9 or the air ducts can be formed by introducing a metal sheet 20 or another boundary wall into the interior 5 of the vapor shield 4. Alternatively, it is also possible to form the air ducts 9 or the air duct through a pipe construction.
• FIG. 3 shows a further embodiment of the extractor hood 1 according to the invention.
• This is a Wandesse.
• the extractor hood 1 has substantially the same structure as the extractor hood 1 shown in Figure 1. However, in this embodiment, only at the front edge 10 of the vapor shield 4, an air outlet gap 11 in the top 12 of the vapor shield 4 is provided.
• FIG. 5 shows a schematic plan view of the embodiment of the extractor hood 1 from FIG. 3.
• the edge element 15 extends over the entire width of the vapor shield 4.
• the sheet 13, which forms the cover of the vapor shield 4 in this case bears against the end regions 151 of the edge element 15. Between these end portions 151 of the air outlet gap 11 is formed. This can be formed by cutting a recess on the edge of the sheet 12 or by bending the sheet 13 in the direction of the interior 5 of the vapor shield 4 or in the air duct 9.
• FIG. 4 shows a schematic sectional view of a further embodiment of the extractor hood 1 according to the invention. In FIG.
• the edge region 10 of the vapor shield 4 is shown.
• the curved surface 14 of the edge region 10 of the vapor shield 4 is formed by an edge element 15, which adjoins a Mitteilteil 21 of the vapor shield 4.
• the suction port 7 of the extractor hood 1 is provided, in which a filter element 8 is received.
• the height of the central part 21 of the vapor shield 4 is lower than the height of the edge element 15.
• the suction opening 7 is offset from the lowest point 142 of the curved surface 14 formed by the edge element 15 upwards.
• the top of the central portion 21 is offset from the highest point 141 of the curved surface 14 down.
• the transition between the central part 21 and the curved surface 14 is formed by bevels 22 and 23.
• the slope 22, which connects the lowest point 142 of the curved surface with the central part 21, in particular in the vicinity of the suction port 7, serves to guide vapors to the suction port.
• the channel 9 formed between the cover or the sheet metal 13 and the upper side of the middle part 21 serves to guide the air to the air outlet gap 1 1. In the region of the slope 23, the height of the air channel 9 decreases.
• a side profile 26 covering the side of the vapor shield 4 is schematically indicated. This has a height corresponding to the distance between the uppermost point 141 and the lowest point 142 of the curved surface 14.
• On the side profile 26 may be provided in the region below the suction port 7, a slope corresponding to the slope 22 and thus be routed reliably on the sides of the vapors to the suction port 7.
• an operating element 24 is also provided in the illustrated embodiment. This is shown as a button. Behind the button 15 actuating devices 25, which are necessary for the actuation of the button, shown schematically in the edge element.
• the actuator 25 can over not shown lines that may extend, for example, through the middle part 21 of the vapor shield 4, with the control of the hood 1, which may be provided for example in the fireplace, be connected.
• the invention is not limited to the illustrated embodiments.
• an edge element which has only a section of the lateral surface of a tube.
• a half pipe can be used.
• edge elements which have a cross section deviating from a circular cross section For example, an oval tube or a portion of a lateral surface of an oval tube can be used.
• an energy-efficient, cost-effective and low-noise extraction of fumes is made possible by means of an extractor hood.
• the influence of the extractor hood on a controlled ventilation and thus on the heat demand in the kitchen environment is reduced by the low volume flow, which is necessary to generate the air flow.
• the design effort of the hood according to the invention is low and improves the visual appearance of the hood due to the feasible smaller dimensions of Wrasenless or the viewing hood.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Ventilation (AREA)
• Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

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Citations (4)

Family Cites Families (20)

• 2007
  • 2007-08-22 DE DE102007039635A patent/DE102007039635A1/de not_active Withdrawn
• 2008
  • 2008-02-27 US US12/531,881 patent/US20100163012A1/en not_active Abandoned
  • 2008-02-27 WO PCT/EP2008/052364 patent/WO2008113664A2/de active Application Filing
  • 2008-02-27 EP EP08717171A patent/EP2137463A2/de not_active Withdrawn
  • 2008-02-27 CN CN2008800088886A patent/CN101646904B/zh not_active Expired - Fee Related

Patent Citations (4)

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