EP3963266A1 - Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtung - Google Patents
Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtungInfo
- Publication number
- EP3963266A1 EP3963266A1 EP20707638.1A EP20707638A EP3963266A1 EP 3963266 A1 EP3963266 A1 EP 3963266A1 EP 20707638 A EP20707638 A EP 20707638A EP 3963266 A1 EP3963266 A1 EP 3963266A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- extractor device
- opening
- secondary air
- suction opening
- air flow
- 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.)
- Granted
Links
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
- F24C15/2042—Devices for removing cooking fumes structurally associated with a cooking range e.g. downdraft
Definitions
- Extractor device kitchen appliance with hob and extractor device and method for operating an extractor device
- the present invention relates to an extractor device, a kitchen appliance with a hob and extractor device and a method for operating an extractor device.
- the invention is therefore based on the object of creating a solution with which the vapor extraction behavior of a hob ventilation can be improved with a lower delivery volume required.
- the invention is based on the knowledge that this can be done by targeted air guidance of a secondary air flow, which influences the sucked vapor at least in the vicinity of the suction opening.
- the object is therefore achieved by a Dunstab.vor device with a suction opening and a Ge blower arranged under the suction opening, via which the primary air is sucked down through the suction opening.
- the extractor device is characterized in that the extractor device has at least one blow-out opening which is adjacent to the suction opening and via which a directed secondary air flow is blown out.
- a device is referred to as a fume extractor device by means of which air, in particular polluted air in the form of fumes and vapors, can be sucked off a hob and / or a worktop.
- the vapor extraction device preferably has at least one filter element for cleaning the air.
- at least one grease filter and optionally an odor filter can be provided in the extractor device.
- the extractor device has a suction opening. According to the invention, several suction openings can be provided on the extractor device. In the following, however, the invention is essentially described with reference to an extractor hood device with only one suction opening.
- a fan is arranged below the suction opening.
- the fan can also be referred to as a fan or suction fan.
- the fan extracts air downwards through the suction opening.
- the air that is extracted is referred to as primary air and in particular represents contaminated air in the form of fumes and vapors.
- the extractor device thus represents a hob ventilation, which can also be referred to as downdraft ventilation or table ventilation.
- the extractor device is characterized in that it has at least one blow-out opening which is adjacent to the suction opening and via which a directed secondary air flow is blown out.
- the at least one blow-out opening can be designed in the form of a hole or a slot.
- the at least one exhaust opening is formed in each case by a pipe end or an opening in the jacket wall of a pipe.
- the discharge opening can also be referred to as a nozzle.
- the air flow from the fan to the at least one blow-out opening can take place by means of a channel, which can have a round or rectangular cross section (flat channel).
- the exhaust opening is arranged adjacent to the suction opening.
- a blow-out opening is referred to as being adjacent to the suction opening, which is at a short distance from the suction opening in the horizontal direction and preferably adjoins the suction opening and is only optionally separated from the suction opening by a separating element.
- the at least one blow-out opening can be in the plane of the suction opening or, in particular in the case of a so-called downdraft extractor device with a suction body with a suction opening, can be offset vertically downwards to the suction opening.
- the suction opening is preferably located in the horizontal direction between the space from which air is to be sucked out, in particular the space above a hob, and the at least one exhaust opening.
- a directed secondary air flow is blown out via at least one blow-out opening.
- the secondary air flow is also referred to below as the supply air flow, secondary air flow or secondary fluid flow, secondary fluid.
- the secondary air can be fresh air from the room in which the extractor device is operated, fresh air from outside the room or vapors and vapors that have been extracted from the room and preferably cleaned.
- a directed air flow is an air flow which, due to the geometry of the blow-out opening and / or the speed at which the air flow is blown out, flows at least over a certain distance in a predetermined direction.
- the direction and speed of the primary air flow which is determined by the fan and the thermal on a hob, can be specifically changed in at least individual areas or be supported.
- the primary air flow can be directed to the suction opening.
- the fan can be operated at a lower output or a smaller fan, that is to say a fan with a lower rated output, can be used. This reduces the noise generated when the primary air is sucked in and the energy requirement is reduced.
- blow-out openings are provided on the extractor device, they can be arranged in a common orientation. However, it is also within the scope of the invention that a first group of exhaust openings are oriented in a first direction and a second group in a second direction. In addition, it is also possible for each blow-out opening to be oriented in a different direction.
- At least one blow-out opening is horizontal. With this arrangement of the at least one blow-out opening, the secondary air can be discharged upward in the vertical direction.
- Directional information such as above, below, front and rear relate, unless otherwise stated, to an extractor device in the assembled state behind a cooktop.
- the directional information at the front with respect to the extractor device relates to the side of the extractor device that faces the hob.
- a coordinate system is shown in FIG. 3, to which reference is made below.
- the x-axis lies in the horizontal and extends in the depth direction of the extractor device and of a hob arranged in front of the extractor device.
- the y-axis is also on the horizontal, extends perpendicular to the x-axis and runs in the width direction of the extractor device and the hob.
- the z-axis lies in the vertical and thus runs in the height direction of the extractor device and is perpendicular to the x- and y-axes.
- the secondary air can be discharged via the exhaust opening in a direction which has at least a vertical component and is directed vertically upwards, for example.
- the horizontal position of the at least one blow-out opening can simplify the construction of the extractor device.
- the blow-out opening or openings can be at a height that corresponds to the height of the hob. speaks. As a result, it is not necessary to provide a separate blow-out duct extending over the height of the top of the hob.
- At least one blowout opening is vertical.
- a secondary air flow can be output via the at least one exhaust opening, which flow has at least a horizontal directional component.
- the secondary air flow can be output horizontally.
- a secondary air flow directed towards one of the sides of the extractor device and thus towards one of the sides of the hob can be generated via the vertical blow-out opening.
- At least one exhaust opening is inclined to the vertical and horizontal.
- the blow-out opening can be designed, for example, as a hole or a slot, through which secondary air is discharged in a direction transverse to the horizontal and vertical.
- the blow-out openings can be arranged, for example, on the upper side of a semicircular channel and a fan-shaped secondary air flow can thus be output upwards via these blow-out openings.
- a nozzle can also form the blow-out opening.
- the directions of the individual exhaust openings can be the same or different from one another.
- At least one exhaust opening is directed upwards.
- a discharge opening is referred to here, through which secondary air can be output in one direction with a vertically upward directional component.
- the direction of the outlet opening can be determined by its arrangement on the extractor device and, if necessary, also by its geometry.
- a horizontal blow opening can be formed by a bore or a hole that is inclined to the vertical. This means that a secondary air stream can be emitted through this horizontally positioned exhaust opening, which flows transversely upwards.
- the secondary air can form an air curtain that delimits the area above the hob.
- the primary air can be above the level of the The hob can be specifically influenced. In particular, at least part of the primary air can be entrained against the main suction direction of the suction opening. The effect achieved in this way is explained in more detail below.
- the blow-out opening lies above the plane of the suction opening and is inclined downward.
- the exhaust opening can be above the plane in which the suction body protrudes upward from the housing of the extractor device, in particular above the level of the hob and be inclined downwards .
- a blowout opening through which secondary air can be discharged in a direction that has at least one downward directional component is referred to as being inclined downward.
- the exhaust opening is preferably oriented in such a way that the secondary air always has a horizontal directional component, that is, it is not output vertically downwards. Through a downwardly inclined exhaust opening, the secondary air can influence the primary air at least partially in the direction of the suction opening.
- the at least one blow-out opening can be provided on a blow-out duct.
- the exhaust duct can be provided in the extractor device so that its top side lies in the plane of the suction opening.
- the top of the blow-out duct can lie in the plane of the hob and a worktop in which the hob is inserted.
- This level preferably corresponds to the level of the suction opening.
- the extractor device is a downdraft extractor device
- the level of the suction opening is above the level of the hob and an optionally provided worktop.
- the blow-out duct is arranged in one embodiment such that the top of the blow-out duct lies in the plane of the hob and possibly the worktop.
- the at least one blow-out opening is provided on an blow-out duct which extends upwards from the plane in which the suction opening is located.
- the plane in which the suction opening is located is preferably the plane of the hob.
- the extractor device is a
- the plane of the suction opening lies, however te above the level of the hob and an optional worktop.
- the exhaust duct extends from the level of the cooking field and optionally the worktop upwards. Since the blow-out duct extends above the level of the hob and preferably the level of the suction opening upwards, the targeted influencing of the primary air that arises above the hob can be ensured in a simple manner, since the blow-out openings are arranged at a certain height above the hob can.
- the suction opening preferably has a width which corresponds to the width of the hob from which the primary air is to be drawn off.
- the width that is to say the extent of the suction opening in the Y direction, is preferably greater than its depth, that is to say its extent in the X direction of the coordinate system defined in FIG.
- the blow-out channel which extends upward from the plane of the hob, is arranged in the middle of the width of the suction opening.
- two exhaust ducts are provided, which are arranged at the lateral ends of the width of the suction opening.
- the blow-out duct is arranged adjacent to the suction opening and preferably offset to the rear.
- blow-out openings are preferably provided on both sides of the blow-out duct which are in the width direction, that is to say the Y-direction.
- exhaust openings are introduced into only one side of the respective exhaust duct.
- the extractor device has a separating element which is arranged between the suction opening and the at least one exhaust opening.
- the separating element is preferably a flat element which extends over the entire width of the suction opening.
- the separating element preferably extends vertically upwards from the plane of the suction opening.
- the secondary air jet emitted from a blow-out opening behind the separating element is guided in a targeted manner at least over the distance over which the secondary air flow flows along the separating element.
- the direct suction of secondary air into the suction opening is reliably prevented by a separating element extending vertically upwards.
- the separating element is a baffle plate.
- the baffle plate can be movably attached to the extractor device, in particular the baffle plate can be moved into and out of the housing of the extractor device. In this way, different heights of cooking vessels can be taken into account or the baffle plate can be retracted when the extractor device is not in use.
- the baffle plate can also be fixed to the extractor device.
- the baffle plate can represent a disk, for example made of glass, plastic or metal.
- the baffle plate preferably has a thickness in the range from 2 mm to 20 mm.
- the thickness of the baffle plate is particularly preferably in the range from 5 to 10 mm, in particular 6 mm. It has been shown that with a baffle plate of this thickness, a targeted formation of the vortices at the upper edge of the baffle plate can be achieved or this is at least promoted.
- the vortex directs the primary air flow to the suction opening.
- the separating element is a suction body which has at least one suction opening on the side facing away from the at least one blow-out opening.
- the suction body can also be referred to as a suction channel.
- the extractor device represents a so-called downdraft extractor device.
- the suction body can be fixed or movably attached to the housing of the extractor device.
- the suction body preferably has a small depth.
- the secondary air flow which is output via the at least one exhaust opening, can be generated by the fan of the extractor device.
- part of the primary air sucked in via the suction opening and optionally cleaned in the fume extraction device can be branched off via a bypass and fed to the exhaust openings.
- a variable secondary air flow that is to say which is dependent on the primary air flow, is formed.
- the speed of the secondary air flow can optionally also be determined by the geometry of the outlet openings.
- part of the exhaust air flow can thus be used in order to advantageously influence the vapor.
- Some of the air, which has been cleaned of grease and odors, can be removed from the exhaust air flow via a bypass.
- the air flow that has been sucked off and cleaned by the extractor device is referred to as the exhaust air flow.
- This air can alternatively be returned to the room in which the extractor device is operated or released into the environment.
- the extractor device can therefore be designed as an exhaust air or circulating air extractor device.
- the extractor device has an additional fan which is connected to the at least one exhaust opening.
- fresh air can be sucked in from the room in which the extractor device is operated or from the environment and blown out of the exhaust openings as a secondary air stream.
- a constant secondary air flow can thus be generated.
- the additional fan can, for example, suck in a stream of fresh air from the furniture base cabinet in order to advantageously influence the vapor.
- clean air is sucked in from the kitchen base cabinet.
- clean air can be drawn in from outside.
- the invention relates to a kitchen appliance with a hob and at least one extractor device, which represents an inventive Dunstabzugsvor direction.
- the kitchen appliance has a hob and at least one extractor device.
- the hob and the extractor hood can be built into a worktop.
- the hob and the extractor device (s) can be placed in a common recess in the worktop.
- the at least one extractor device and the hob are incorporated in separate recesses in the worktop.
- the at least one extractor device is provided on an edge of the hob so that the suction opening of the extractor device extends along the edge of the hob.
- the suction opening is arranged in the horizontal direction between the at least one blow-out opening and the hob. This means that the suction opening is closer to the hob than the at least one exhaust opening.
- the primary air flow that is sucked in via the suction opening is influenced in the vicinity of the suction opening.
- the invention differs from Dunstab.vor devices in which a supply air stream is generated on the side of the hob opposite the suction opening and is directed towards the suction opening.
- the at least one extractor device is arranged behind the hob.
- An extractor device is referred to as being arranged behind the hob, in which the suction opening and the at least one blow-out opening lie in the negative X direction in the coordinate system according to FIG. In this position, for example, on a hob that is placed on a cooking island ll
- an air curtain can be formed behind the hob and thus influencing the flow conditions above the hob from behind can be avoided.
- the extractor device has a baffle plate, which is provided as a separating element between the suction opening and the at least one blow-out opening.
- the width of the baffle plate corresponds, for example, to the width of the hob. This enables targeted screening of the suction opening, which preferably also corresponds to the width of the hob, to be ensured.
- the invention relates to a method for operating an extractor device according to the invention.
- the method is characterized in that at least one secondary air flow is emitted via the at least one exhaust opening in such a way that the at least one secondary air flow is directed outwards over the sides of the suction opening.
- the secondary air flow directed outwards over the sides can also be referred to as an air curtain or air film and is preferably fed by more than one Ausblasöff voltage.
- the air curtain can represent a continuous curtain or be formed from individual secondary air flows. In the latter case, the speed of the air can vary slightly via the air curtain.
- the secondary air flow is directed outwards at least over the sides of the suction opening. As sides of the suction opening who referred to the longitudinal ends of the preferably elongated suction opening. Thus, the secondary air flow is directed in the width direction of the suction opening and thus also in the width direction of the extractor device and the hob.
- the air curtain is preferably formed parallel to the baffle plate and, as it were, forms an extension of the baffle plate on both sides and obliquely upwards. It delimits the lateral area in front of and behind the baffle plate from one another. This also prevents a lot of primary air from being sucked in from the sides.
- the secondary air flow is oriented such that it lies in a plane which is parallel to a plane in which the longitudinal extent of the suction opening lies. According to the invention, however, it is also possible for the secondary air flow to be directed in a direction which is inclined forwards, in particular towards the hob. This inclination of the secondary air flow is, however, preferably small and in particular less than 90 °, preferably less than 45 °. According to one embodiment, the secondary air flow can be output in such a way that it is directed at least partially from behind onto a separating element, flows along the separating element and tears away from the side edge of the separating element and flows laterally outward.
- the secondary air is output in a fan shape.
- a secondary air flow emitted from an exhaust opening can be fanned out.
- secondary air flows from several exhaust openings can together form a fan shape.
- the secondary air flows upwards at least in the edge region of the upper edge of the separating element and the secondary air flow forms at least one vortex in the middle region of the upper edge of the separating element.
- the center of the at least one vertebra lies in front of the separating element. Because the center of the vortex is in front of the separating element, this can, on the one hand, allow primary air to escape Reliably prevent upwards and also directs primary air downwards in the direction of the suction opening at an early stage and thus supports suction.
- two symmetrical vertebrae are formed.
- a vortex is preferably formed on the sides of the respective compartment part that face one another, that is, between which no secondary air flows upwards.
- the vortices are thus in the middle area of the width of the upper edge of the baffle plate.
- the two vortices can be separated from one another in the width direction of the impact plate or form a common vortex.
- the axis of the vortex or vortices is parallel to the baffle plate.
- the speed of the secondary air flow is preferably greater than the speed of the primary air flow at the suction opening.
- the average exit speed of the secondary air at the exhaust opening is in the range from 6 to 7 m / s with a volume flow of the secondary air of 120 to 150 m 3 / h.
- an exit speed of the secondary air can be set in the range from 6 to 7 m / s with a volume flow in the range from 130 to 150 m 3 / h.
- the exit speed denotes the vertical speed component.
- the exit speed can be higher by changing the geometry of the outlet opening, in particular of nozzles with a smaller outlet opening, or lower in the case of nozzles with a larger outlet opening.
- the exit speed indicates an average exit speed, it being possible for the exit speed to be unevenly distributed over the outlet opening or nozzles provided therein. If low exit speeds are used, a high volume flow is preferably set in order to continue to achieve advantages of the invention.
- the present invention can be a targeted in a simple manner, for example by adjusting the parameters of the thickness of the baffle plate, the suction power of the fan, the size and position of the suction opening, the height of the baffle plate and the volume flow, the Ge speed and the direction of the secondary air flow Air routing and influencing of the primary air take place.
- the top of the impact Plate form at least one vortex of the secondary air, through which the primary air can be prevented on the one hand from escaping and sweeping past the upper edge of the baffle plate and which also supports the suction of the primary air.
- FIG. 1 a schematic rear view (1a), side view (1b) and top view (1c) of a first embodiment of the kitchen appliance according to the invention
- FIG. 2 a schematic rear view (2a), side view (2b) and top view (2c) of a second embodiment of the kitchen appliance according to the invention
- FIG. 3 a schematic perspective view of an embodiment of a kitchen appliance according to the invention with a coordinate system
- Figure 3a a schematic perspective view showing the flow speeds
- FIGS. 4a and 4b representations of the flow conditions through the lateral planes Y +, Y- without and with secondary air flow as streamlines;
- FIGS. 4c and 4d representations of the flow conditions through the lateral planes Y +, Y- without and with secondary air flow as velocity vectors along flow lines;
- FIGS. 5a and 5b representations of the flow conditions through the lateral planes Y +, Y- without and with secondary air flow as velocity vectors along flow lines in a perspective view;
- FIGS. 6a and 6b representations of the flow conditions through the rear plane X- without and with secondary air flow as velocity vectors along streamlines in perspective view
- FIGS. 7a and 7b representations of the flow conditions through the upper plane Z + without and with a secondary air flow as velocity vectors along streamlines in perspective view;
- FIGS. 8a and 8b representations of the flow conditions through the front plane X + with and without a secondary air flow as velocity vectors along streamlines in a perspective view;
- FIG. 9 schematic representations of different embodiments of a
- FIG. 10 a schematic rear view (10a), side view (10b) and top view
- FIG. 11 a schematic rear view (11a), side view (11b) and top view
- FIG. 12 a schematic rear view (12a), side view (12b) and top view
- FIG. 13a a schematic perspective view showing the flow velocities
- FIG. 13b a schematic side view of the embodiment according to FIG. 13 with a tangential projection of the velocity vectors.
- a first embodiment of the kitchen appliance 1 is ge shows.
- the kitchen appliance 1 comprises a hob 3 and an extractor device 2.
- the extractor device 2 comprises a suction opening 20 and several blow-out openings 21.
- the blow-out openings 21 are formed in the top of a blow-out duct 210.
- a separating element 22 in the form of a baffle plate 220 is arranged between the exhaust openings 21 and the suction opening 20.
- the extractor device 2 furthermore has a fan (not shown) by means of which air is sucked into the suction opening 20 becomes.
- the extractor device 2 can have an additional fan (not shown), via which air is guided to the at least one blow-out opening 21.
- the extractor device 2 also has a housing 23, of which only one cover can be seen in FIG.
- the hob 3 is arranged in front of the suction opening 20.
- a cooking vessel G in the form of a pot is shown schematically on the hob 3.
- the secondary fluid flow S is output in a fan shape.
- the secondary air flow S can, as shown, blow out directed from the blow-out openings 21 in the direction of the baffle plate 220.
- the type of production of the secondary volume flow for the secondary air flow S and the presence or the geometry of the baffle plate 220 are irrelevant.
- blow-out openings 21 Secondary air is blown out of the blow-out openings 21 from the blow-out duct 210. It is also within the scope of the invention for the blow-out duct 210 to have only one blow-out opening 21 which extends over the entire length of the top of the blow-out duct 210.
- the blow-out takes place, as shown in FIG. 1, near the baffle plate 220.
- the secondary air can initially be discharged through the blow-out opening 21 in the direction of the baffle plate. Due to the proximity to the baffle plate 220, the fan-shaped secondary volume flow S is applied to the baffle plate 220. This effect is also known as the Coanda effect.
- the secondary fluid experiences a slight deflection in the direction of the hob, and the secondary fluid flow S thus breaks off.
- a boundary layer flow arises between the secondary fluid flow S.
- the boundary layer flow is present here even without the presence of a solid boundary.
- the primary fluid is entrained by air friction and directed in the desired direction towards the suction opening. Due to the mass movement of the primary fluid in the direction of the trailing edge, the primary fluid is divided in the direction of suction and opposite to suction (following the secondary fluid). A continuous flow develops. As a result, the primary fluid is increasingly directed from the front and upper area of the hob towards the suction.
- the secondary fluid flow S forms an air curtain which makes air flow from the area in front of the baffle plate 220 to the area behind the baffle plate 220 considerably more difficult.
- FIG. 2 a second embodiment of the cooking appliance according to the invention is shown.
- the second embodiment differs from the first embodiment only in that in the second embodiment, instead of a baffle plate 220, a suction body 221 is provided as a separating element 22.
- the suction body 221 represents a hollow body which is closed at the top and which can also be referred to as a channel. In the upper region of the side of the suction body 221, the suction opening 20 of the vapor extraction device 2 is formed. Air can be sucked in via the hollow suction body 221 to the fan (not shown) located below the level of the hob 3.
- the secondary fluid flow S which is blown out through the blow-out openings 21 forms a fan which extends at least beyond the lateral edges of the suction body 221.
- an entrainment effect of the primary air flow P is generated by the secondary air flow S and the primary air flow P is reliably directed to the suction opening 20 in the suction body 221.
- FIG 3 the geometry of an embodiment of the cooking device is shown with reference planes.
- Figure 3a the exit shape of the mass flow of the secondary fluid is shown.
- the secondary air flow S forms a fan which extends along the rear side of the baffle plate 220 to the sides of the baffle plate 220 and projects beyond it.
- the mass flow in the vertical direction is low.
- the secondary fluid flow S is also directed upwards and extends beyond the top of the baffle plate.
- the speed of the secondary fluid flow is higher in the vicinity of the outlet opening and decreases with greater distance from the outlet opening. In particular, the speed decreases from reaching the edges of the baffle plate 220.
- the flow conditions are shown by different reference levels of Figure 3 in different representations. The flow conditions with and without secondary air flow are shown here.
- a too high volume flow which flows from the sides of the suction opening (Y + and Y- planes) to the suction, has a negative effect on the vapor capture rate.
- Such a volume flow can arise, for example, by sucking in air around the hob.
- the lateral primary volume flow on the other hand, only has a slight effect on the vapor collection rate and takes up a large part of the total required suction power of the blower.
- FIGS. 4a and 4b representations of the flow conditions through the lateral planes Y +, Y- with and without secondary air flow are shown as streamlines.
- the secondary air flow entrains the primary air flow in its front area as soon as the secondary air flow passes the edge of the baffle plate.
- the mass of the primary fluid must flow in. This results in the lateral outer area being separated from the inner area by an air curtain through the primary fluid.
- the outer rear area that is to say the side area behind the baffle plate, is also separated from the side front area by the secondary air flow.
- the primary fluid is deflected downward in the direction of the suction opening 20 and only part of the mass of the primary fluid is entrained by the secondary fluid.
- Figures 4c and 4d show the flow conditions through the lateral planes Y +, Y- without and with secondary air flow as velocity vectors along streamlines
- Figures 5a and 5b show representations of the flow conditions through the lateral planes Y +, Y- without and with secondary air flow as velocity vectors along streamlines in a perspective view . As can be seen from these figures, a more targeted suction of the primary fluid is achieved.
- FIGS. 6a and 6b show representations of the flow conditions through the rear plane X- without and with secondary air flow as velocity vectors along streamlines in a perspective view.
- a large part of the primary volume flow sucked in comes from the area behind the hob and in particular behind the baffle plate. This volume flow is undesirable because if the discharge is too weak it Suction power cannot pull down the vapors that develop on the hob and use part of the total suction power.
- the flow conditions through the rear plane X- are shown in FIG. 6a. It can be seen here that the leakage current from the area behind the hob and in particular behind the baffle plate is limited.
- the leakage current is limited in particular by the fact that the secondary fluid entrains mass of the primary fluid for reasons of continuity. This already happens at the tear-off point on the edge of the impact plate. As a result, a flow tendency is imposed on the primary fluid in the distant upper area in the direction of the suction opening and the baffle plate. In addition, the secondary fluid acts as an air curtain, which prevents primary fluid from being sucked in from behind the baffle plate.
- FIGS. 7a and 7b representations of the flow conditions through the upper plane Z + with and without a secondary air flow are shown as velocity vectors along streamlines in a perspective view.
- the flow conditions in the vicinity of the cooking vessel G are shown as a result.
- the primary volume flow is deflected downwards by the effect of the secondary air jet in the direction of the suction opening and baffle plate.
- the exit form of the mass flow of the secondary fluid is shown in one embodiment of the extractor device.
- the secondary air flow S forms a fan which extends along the rear side of the baffle plate 220 to the sides of the baffle plate 220 and projects beyond it.
- the mass flow is lower in the vertical direction.
- the fan of the secondary air flow splits.
- the secondary air flow S being torn off at the upper edge of the baffle plate 220 and the suction of the primary air flow (not shown in FIG. 13a) in front of the baffle plate 220, two vortices W are formed.
- the vortices W are created by rolling up the secondary air flow as soon as it passes the upper edge of the baffle plate 220.
- the vortices W are stationary.
- the vortex W creates an additional component that deflects the rising vapors, i.e. the primary air flow, early downwards in the direction of the suction opening.
- FIG. 13b shows a tangential projection of the speed vector onto a plane normal to the Y-axis at a distance of 100 mm from the vertical outer edge of the impact plate 220.
- the vortex formation on the upper edge of the baffle plate 200 in particular the roll-up of the secondary air flow on the upper edge of the baffle plate 220 and the effect on the primary air flow in the lower region of the baffle plate 220 can be seen.
- the exact shape of the baffle plate is not important. However, a minimum height can be advantageous in order to separate the primary volume flow from the secondary volume flow from one another so that no primary fluid which contains vapor is entrained in the lower area.
- the height and width of the baffle plate are not decisive for the functional principle. However, different optimal dimensions can be selected for different applications, for example the height of the baffle plate as a function of the pot height or the width as a function of the hob width.
- the shape of the separating element and in particular the baffle plate has no influence on the effect of the secondary air flow. Different types and shapes of baffle plates can thus be used.
- Various shapes of baffle plates are shown schematically in FIG. As can be seen from FIG. 9, depressions (FIGS.
- a third embodiment of the kitchen appliance 1 according to the invention is ge shows. This third embodiment differs from the first embodiment shown in FIG. 1 only in the design of the blow-out duct 210.
- blow-out channels 210 are located on the side of the baffle plate 220 that faces away from the suction opening 20.
- the blow-out ducts 210 are provided on the outer lateral edges of the baffle plate 220.
- the blow-out openings 21 are located on the respective blow-out channel 210 on the side that faces outwards.
- a secondary air flow S is released to the outside on the sides.
- the blow-out openings 21 are designed such that the secondary air flow S is discharged upwards in a fan shape.
- the exhaust openings 21 are designed so that the secondary air flow is output in a fan-shaped downward direction. At least the lower blow-out openings 21 of the blow-out channels 210 can be directed downwards.
- FIG. 11 a fourth embodiment of the kitchen appliance 1 according to the invention is shown.
- This fourth embodiment differs from the third embodiment shown in FIG. 10 only in the design of the blow-out duct 210.
- the fourth embodiment of the two vertically running blow-out ducts 210, only one vertically running blow-out duct 210 is provided.
- the blow-out channel 210 is located on the side of the baffle plate 220 which faces away from the suction opening 20.
- the exhaust duct 210 is arranged in the middle of the width of the baffle plate 220 and thus also in the middle of the width of the suction opening 20.
- the exhaust openings 21 are located on the opposite outwardly facing sides of the exhaust duct 210.
- a secondary air flow S is emitted to the outside on the sides.
- the blowout openings 21 can also be designed in such a way that the secondary air flow S is blown out at an incline towards the baffle plate 220. The secondary air flow hugs the baffle plate due to the Coanda effect and only tears away from the baffle plate 220 at the outer edges of the latter.
- the exhaust openings 21 are designed in such a way that the secondary air flow S is discharged upwards in a fan shape.
- the blow-out openings 21 are designed so that the secondary air flow is output in a fan shape downwards. At least the lower blow-out openings 21 of the blow-out channels 210 can be directed downwards.
- a fifth embodiment of the kitchen appliance 1 according to the invention is shown. This fifth embodiment differs from the first embodiment shown in FIG. 1 only in the design of the blow-out duct 210.
- the blow-out duct 210 has a semicircular surface which extends vertically upwards.
- the exhaust openings 21 are located in the upper side of the exhaust duct 210 and are designed such that they emit a secondary air flow S to the outside to the sides.
- the blow-out openings 21 can also be designed in such a way that the secondary air flow S is blown out at an incline towards the baffle plate 220.
- the blow-out openings 21 are designed so that the secondary air flow S is discharged upwards in a fan shape.
- the present invention is not restricted to the embodiments shown by way of example.
- the shape and arrangement of the exhaust openings, the baffle plate and the suction opening can differ from the embodiments shown.
- the embodiments shown in the figures can be combined with one another.
- the type of suction opening and the partition element from the second embodiment can be combined with each of the blow-out variants of the third to fifth embodiment.
- the directed secondary air flow will direct and in particular deflect the vapor so that it reaches the suction openings in a targeted manner.
- the exhaust air flow i.e. the primary air flow
- the directed secondary air flow is blown out behind the baffle plate.
- the targeted air flow the volume flow into the space above the hob can be regulated from above, front and back.
- the suction can take place flat in front of a baffle plate.
- the present invention has a number of advantages. With the present inven tion, the vapor extraction behavior can be improved and, in addition, a noise reduction and an increase in energy efficiency can be achieved by reducing the volume of ventilation required for table ventilation. In particular, very good suction, that is to say vapor capture rate, can be achieved on hobs that are further away from the suction area of the suction opening and even with tall pots.
- Today's hob ventilation systems can only suck in vapors over a limited distance. The distance of around 380-450mm to the front cooking zone of a four-zone hob cannot be overcome with the usual conveying volumes, i.e. the vapors that develop on the front cooking zone cannot be extracted. This problem does not occur in the present invention due to the targeted secondary air flow.
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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)
- Cookers (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22153673.3A EP4027063B1 (de) | 2019-04-30 | 2020-02-28 | Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019206240.7A DE102019206240A1 (de) | 2019-04-30 | 2019-04-30 | Dunstabzugsvorrichtung, Küchengerät mit Kochfeld und Dunstabzugsvorrichtung und Verfahren zum Betreiben einer Dunstabzugsvorrichtung |
| PCT/EP2020/055315 WO2020221492A1 (de) | 2019-04-30 | 2020-02-28 | Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtung |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22153673.3A Division EP4027063B1 (de) | 2019-04-30 | 2020-02-28 | Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtung |
| EP22153673.3A Division-Into EP4027063B1 (de) | 2019-04-30 | 2020-02-28 | Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3963266A1 true EP3963266A1 (de) | 2022-03-09 |
| EP3963266B1 EP3963266B1 (de) | 2024-12-18 |
Family
ID=69723953
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22153673.3A Active EP4027063B1 (de) | 2019-04-30 | 2020-02-28 | Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtung |
| EP20707638.1A Active EP3963266B1 (de) | 2019-04-30 | 2020-02-28 | Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtung |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22153673.3A Active EP4027063B1 (de) | 2019-04-30 | 2020-02-28 | Dunstabzugsvorrichtung, küchengerät mit kochfeld und dunstabzugsvorrichtung und verfahren zum betreiben einer dunstabzugsvorrichtung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12385651B2 (de) |
| EP (2) | EP4027063B1 (de) |
| CN (1) | CN113785161B (de) |
| AU (1) | AU2020266966B2 (de) |
| DE (1) | DE102019206240A1 (de) |
| ES (2) | ES2970552T3 (de) |
| WO (1) | WO2020221492A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021202872A1 (de) * | 2021-03-24 | 2022-09-29 | BSH Hausgeräte GmbH | Dunstabzugsvorrichtung und Küchenanordnung |
| DE102021204128A1 (de) * | 2021-04-26 | 2022-10-27 | BSH Hausgeräte GmbH | Kombinationsgerät mit Kochfeld und Dunstabzugsvorrichtung |
| DE102024206167A1 (de) * | 2024-07-02 | 2026-01-08 | BSH Hausgeräte GmbH | Verfahren zum Betreiben eines Dunstabzugs eines Kochfelds mit integriertem Dunstabzug und Kochfeld mit integriertem Dunstabzug |
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| US1596096A (en) * | 1926-03-10 | 1926-08-17 | Norman U Greenlaw | Smoke hood for cookstoves |
| DK630174A (da) * | 1974-12-04 | 1976-06-05 | C P N Aaberg | Apparat til punktafsugning ved svejsning og andre luftforurenende processer |
| JPS58178988A (ja) * | 1982-04-14 | 1983-10-20 | 松下電器産業株式会社 | 調理器ユニツト |
| JPS61105036A (ja) * | 1984-10-29 | 1986-05-23 | Matsushita Electric Ind Co Ltd | 調理器ユニツト |
| JPH0247387Y2 (de) * | 1986-06-17 | 1990-12-13 | ||
| JPS63148595A (ja) | 1986-12-11 | 1988-06-21 | 松下電器産業株式会社 | 加熱調理装置 |
| JP2001174037A (ja) * | 1999-07-01 | 2001-06-29 | Daikin Ind Ltd | トルネード型吸気・送風装置 |
| KR20000017710A (ko) | 1999-07-24 | 2000-04-06 | 이성환 | 주방 환기설비 시스템 |
| JP2001340227A (ja) * | 2000-06-06 | 2001-12-11 | Toshiba Home Technology Corp | 加熱調理器 |
| DE20221100U1 (de) * | 2002-04-11 | 2005-01-27 | Maier, Max | Dunstabsaugvorrichtung für ein Kochfeld o.dgl. und insbesondere dafür geeigneter Fettfilter |
| JP4145922B2 (ja) * | 2003-02-14 | 2008-09-03 | 嘉明 金谷 | 排気方法および局所換気方法、ならびに排気装置、局所換気装置および換気システム |
| WO2004090425A2 (de) * | 2003-04-09 | 2004-10-21 | Boffi S.P.A. | Vorrichtung zum absaugen und zuführen von luft für eine kochstelle |
| KR100685004B1 (ko) * | 2005-01-20 | 2007-02-20 | 주식회사 하이넷 | 가스레인지 |
| DE102005010002A1 (de) * | 2005-03-03 | 2006-09-14 | Max Maier | Dunstabsagvorrichtung, insbesondere für Küchen |
| US7836877B2 (en) | 2005-05-02 | 2010-11-23 | Western Industries, Inc. | Adjustable downdraft ventilator |
| JP4525535B2 (ja) * | 2005-09-05 | 2010-08-18 | パナソニック株式会社 | 誘導加熱調理器 |
| ITPN20060058A1 (it) * | 2006-07-27 | 2008-01-28 | Electrolux Professional Spa | Cappa di aspirazione a ventilazione perfezionata |
| DE102006055001A1 (de) * | 2006-11-17 | 2008-05-21 | Bohner Produktions Gmbh | Dunstabsaugeinrichtung |
| ITMC20070118A1 (it) * | 2007-06-06 | 2008-12-07 | Veljko Martic | Cappa aspirante per cucine di innovativa concezione. |
| US20090211564A1 (en) * | 2008-02-22 | 2009-08-27 | Chi-Chuan Pan | Smoke Exhaust With An Air Curtain Fan |
| JP2009299966A (ja) * | 2008-06-11 | 2009-12-24 | Inax Corp | 水周り設備室の排気装置 |
| JP4978644B2 (ja) * | 2009-03-06 | 2012-07-18 | 三菱電機株式会社 | 空気処理装置 |
| CN201764566U (zh) * | 2010-08-12 | 2011-03-16 | 广州妙的电器科技有限公司 | 循环滤油环保集成灶 |
| DE102010042436B4 (de) | 2010-10-14 | 2022-01-05 | BSH Hausgeräte GmbH | Kochfeld mit integrierter Dunsthaube |
| KR101779206B1 (ko) * | 2011-02-07 | 2017-09-18 | 에스케이매직 주식회사 | 주방 환기 시스템 |
| TW201309247A (zh) * | 2011-08-19 | 2013-03-01 | Fancy Food Service Equipment Co Ltd | 具節能、減噪、循環除煙之鐵板燒機台 |
| KR101934457B1 (ko) * | 2011-11-17 | 2019-01-04 | 삼성전자주식회사 | 환기 장치와 이를 포함한 환기 시스템 |
| US9604266B2 (en) * | 2012-03-16 | 2017-03-28 | Illinois Tool Works Inc. | Airborne component extractor manifold |
| SG2012063723A (en) * | 2012-08-24 | 2014-03-28 | Kim Lui So | Apparatus for channelling cooking fumes |
| DE102015111337B4 (de) * | 2015-07-14 | 2025-05-22 | Miele & Cie. Kg | Kochvorrichtung |
| CN108224517A (zh) * | 2016-12-21 | 2018-06-29 | 杨肇 | 零和式集成灶 |
| KR20180081343A (ko) * | 2017-01-06 | 2018-07-16 | 삼성전자주식회사 | 환기 시스템 및 그 제어방법 |
| DE102017216456A1 (de) * | 2017-09-18 | 2019-03-21 | BSH Hausgeräte GmbH | Lüftungsvorrichtung für Kochfeld und Kochfeld mit Lüftungsvorrichtung |
| CN107461785B (zh) * | 2017-09-26 | 2020-07-28 | 宗海燕 | 一种近吸排油烟机 |
-
2019
- 2019-04-30 DE DE102019206240.7A patent/DE102019206240A1/de active Pending
-
2020
- 2020-02-28 WO PCT/EP2020/055315 patent/WO2020221492A1/de not_active Ceased
- 2020-02-28 US US17/439,427 patent/US12385651B2/en active Active
- 2020-02-28 ES ES22153673T patent/ES2970552T3/es active Active
- 2020-02-28 ES ES20707638T patent/ES3015415T3/es active Active
- 2020-02-28 EP EP22153673.3A patent/EP4027063B1/de active Active
- 2020-02-28 CN CN202080032374.5A patent/CN113785161B/zh active Active
- 2020-02-28 EP EP20707638.1A patent/EP3963266B1/de active Active
- 2020-02-28 AU AU2020266966A patent/AU2020266966B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP4027063B1 (de) | 2023-11-01 |
| WO2020221492A1 (de) | 2020-11-05 |
| EP4027063A1 (de) | 2022-07-13 |
| AU2020266966A1 (en) | 2021-11-25 |
| ES3015415T3 (en) | 2025-05-05 |
| EP3963266B1 (de) | 2024-12-18 |
| CN113785161B (zh) | 2023-12-08 |
| US12385651B2 (en) | 2025-08-12 |
| DE102019206240A1 (de) | 2020-11-05 |
| ES2970552T3 (es) | 2024-05-29 |
| CN113785161A (zh) | 2021-12-10 |
| AU2020266966B2 (en) | 2023-04-20 |
| US20220154946A1 (en) | 2022-05-19 |
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