EP0891519B1 - Verfahren zum eingrenzen, erfassen und absaugen von dunst, staub ,sowie einrichtung zur durchführung des verfahrens - Google Patents
Verfahren zum eingrenzen, erfassen und absaugen von dunst, staub ,sowie einrichtung zur durchführung des verfahrens Download PDFInfo
- Publication number
- EP0891519B1 EP0891519B1 EP97920575A EP97920575A EP0891519B1 EP 0891519 B1 EP0891519 B1 EP 0891519B1 EP 97920575 A EP97920575 A EP 97920575A EP 97920575 A EP97920575 A EP 97920575A EP 0891519 B1 EP0891519 B1 EP 0891519B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- suction
- flow
- hood
- curved
- vortex
- 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.)
- Expired - Lifetime
Links
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- 239000000428 dust Substances 0.000 title claims abstract description 6
- 239000003517 fume Substances 0.000 title claims abstract description 4
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- 239000003570 air Substances 0.000 description 52
- 238000007664 blowing Methods 0.000 description 30
- 239000000853 adhesive Substances 0.000 description 11
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Images
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
- F24C15/2028—Removing cooking fumes using an air curtain
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/183—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by centrifugal separation, e.g. using vortices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/36—Kitchen hoods
Definitions
- the invention relates to a method and a device for restricting, detecting and Extracting haze, dust from kitchen stoves, Cooking areas and industrial workplaces occur.
- the invention can be found in broader sense for the detection and suction of other fluid media, e.g. Solutions, dispersions or suspensions can be used.
- the invention extractor hoods for use in kitchen technology and in the Clean room technology.
- Vapors, dusts, fumes are usually pollutants that are made up a fluid medium, especially air, by suction through a filter, e.g. Extractor hoods from which the media flow is to be removed. These substances occur often in very fast and turbulent currents.
- a pure intake flow is usually unsuitable for detecting such flows since they are neither related to Strength, structure, stability is able to redirect a turbulent flow and vacuum. For this reason, the suction volume flow becomes significant chosen larger than the pollutant volume flow, or it becomes a large extraction screen used, which has a high suction power.
- From DE-PS 39 18 870 C2 is a method for improving the intake flow field an extractor hood known.
- a free jet pointing down and one wall jet directed towards the suction surface produce interacting a front vortex, the flow field of which an aerodynamic wall around the Extractor hood should produce.
- DE 42 03 916 C1 provides a method, the blowing flow according to DE 39 18 870 to be designed so that it is designed with higher intrinsic stability and helically and continues the front swivel on the sides of the extractor hood.
- a disadvantage of both The aforementioned methods are in particular the complex structure of a Double slot nozzle for the generation of the front vortex and the wall jet as well as that Problem of deriving the front swirl at the corners of extractor hoods.
- a recirculation hood is known in which the Pressure chamber of the hood over the blower through a front and side Air outlet slots obliquely downwards in the form of a straight-line outlet jet is blown against the work surface.
- the exhaust jet is a pure free jet, which is inclined slightly forward with a straight line up to the line of stowage on the stove flows down and to a large extent inwards when it hits the hob and is redirected outwards to a smaller extent.
- the one diverted inwards Part supports the suction effect of the fan, the part deflected outwards becomes the upflow in recirculation mode due to the suction effect of the fan added.
- the flow field of such a recirculation hood is up to Work surface oriented in a straight line and forms together with the down slowing free jet the so-called "air curtain” and on the Worktop a “storage line".
- This air curtain is a straight beam in the room that Entrains pollutant elements.
- a front is used as a boundary between different ones Air masses known.
- a front is a strongly convergent flow area, on the extreme gradient, e.g. of temperature or humidity, preferably nearby of boundary surfaces, such as the floor or a wall.
- a Such a front is also used as a flow area in the case of the present invention generated between the extractor section and the exhaust area of the hood.
- the object of the invention is the intake flow field on a hood for Vapors, dusts and vapors improve so that vapors, vapors and / or dust and the ambient air are separated from each other, creating a front.
- a blowing jet emerging in the area of the front edge of the hood is led into a Intake surface deflected directed movement and into a vortex or a curved Shear flow or shear layer formed.
- a vortex a rigid rotating core surrounded by a shear layer or shear flow is.
- This shear flow is a the front generating convergent flow field can build up when the flow strikes a wall or a counter current.
- the ratio of jet volume flow to exhaust air volume flow should depend on the case used exhaust air line by throttling in the exhaust air duct and in the blast air duct are, so that this method lends itself to hoods in recirculation mode, the sucked air is divided into the blow jet and the circulating air flow; the air can be similar to normal air circulation hoods in the area above the hood be blown out.
- throttles can be omitted because between the suction fan and Blowers for the jet and front generation, which is referred to as vortex blowers, is distinguished.
- a vortex blower sucks, but blows through the blowout slot out again.
- the corresponding volume flow is device-specific.
- a vortex blower can either via a surface filter or via the edge suction or from the Vacuum the area above the hood, and one exhaust fan can be used over both Suctions are operated.
- the intake flow field can be improved by appropriate constructive designs become.
- One possibility is to homogenize the flow.
- the Basic hood shape circular segment-shaped, ellipsoid segment-shaped or has a different design, curved shape, the front vertebra is continuous and is not through corners or sharp edges disturbed, which only exist on the wall connections of the hood are.
- a ring-shaped, closed basic shape without lateral limitation and interference of the front swirl is particularly suitable for island extractor hoods. this applies basically for all suction processes with a vortex flow or a front vortex Work along the front edge of the hood to create a front.
- the extractor hood is like this formed that two or more blowing jets, each with a curved shear flow generating device are provided that work in parallel to each other, where a blow jet is divided into two separate jets inside the hood that overlap at the edge of the hood in their lateral curvature area, such that the outer curved wall is shorter than the inner curved wall, so that two spaced apart shear flows are achieved.
- a special embodiment of the invention relates to a Coanda vortex hood, in which the outlet opening is moved or spaced from the front edge of the hood to the rear is. This ensures that the suction effect of the jet under the stem the half space is limited, and that compared to an exhaust opening directly the hood leading edge the suction effect of the jet is increased. Here it is sufficient to blow out only at the front of the hood. Thereby form on the lateral boundaries of the overblown tube longitudinal vortex that prevent the escape of the Prevent haze on the side edges of the hood - with comparable known ones Arrangements, these longitudinal vortices were generated by special deflection devices. For a good formation of these longitudinal vertebrae it is crucial that they are below one Shielding.
- the end of the blow-out slot and the pipe must therefore also be provided spaced from the side edges. With recirculation mode it expedient. the part of the air that is not blown out over the curve, to let out slowly and over a large area.
- the exit point should be as far away from the front edge of the hood as this flow can also have a suction effect on the vapor or steam, which affects the function the hood would deteriorate.
- Another embodiment of the invention relates to a combination of frontal vertebrae with edge suction, which improves the suction effect.
- At Frontal vortex hoods with edge suction are placed between blowing edges and suction edges distinguished from an extractor hood.
- the blowing edge is an edge on the is blown out to create a frontal flow directed towards the extraction openings produce.
- a suction edge is an edge at which suction is carried out.
- the edges of one Extractor hoods can be used as blowing edges, blowing and suction edges, suction edges or only be side edges (without function as blowing or suction edges).
- the edge suction works either with a strip-shaped surface filter on the edge or a slot on the edge, the filter being arranged behind this slot.
- the construction effort is along all hood edges or along the entire circumference of the hood a device for generating a Attaching front swirls, not justified.
- the Edge suction is expediently designed so that along a gap generates a very high suction speed in the order of magnitude of the blowing flow becomes.
- the channel expands to the air speed when flowing through the Keep filters as low as possible.
- it is also a wall-shaped one Surface suction possible at the edges instead of the slit suction.
- a tube with flow around it is provided, in which the profiling outside as a straight continuation of a tangent to the curvature takes place while this continuation inside the blow-out device is shortened more.
- the transition to the pipe is modeled as smoothly as possible.
- Another method is to stabilize the flow from the side Suction openings are provided near the ends of the blow-out device. Furthermore boundary layer suction can be carried out at the ends of the blow-out device become.
- Another alternative is to blow out a second wall jet, which in Connection with a flow around the pipe acts as an adhesive jet.
- the tube has an inlet for the side inside the hood Air of the adhesive jet.
- a slot is formed below the hood, from which the Adhesive jet emerges.
- the continuation of the frontal vortex or the curved shear flow over one additionally generated longitudinal vortices at the ends of the blow-out device represents a another alternative.
- the stabilization of the blowing flow by setting, Boundary layer suction near the suction surface or by an adhesive jet engage in other critical areas of the blow-out device.
- a suction device in the form of a so-called Vortex tube in which a radial and an axial flow always more are merged, making this flow one at the exit rotating beam is formed.
- a current is a continuation of one Blow-out flow suitable.
- Eddy current can be arranged on the outside of a pipe with a flow around it Eddy current can be arranged.
- the tube also forms the air supply for the Swirl tube.
- the air for the swirl tube also comes from the blow room of the hood and passes through the opening in the tube through the inlet into the swirl tube. The one out the jet flowing through the outlet opening is directed towards the suction surfaces. Is the The exit of the vortex tube is not formed centrally in the truncated cone, the exit follows below the hood floor.
- the vortex tube can also slant downwards the space below the hood floor and the truncated cone leading to the Converging the flow can point in the desired direction.
- the direction of rotation of the frontal and longitudinal vertebrae is such that the Longitudinal vertebrae represent a continuation of the frontal vertebrae at the corners.
- a swirl tube is particularly well suited to the frontal flow structure of square hoods to continue the pages. However, it can also be applied to semi-ring-shaped hoods with the flow around the hollow body, e.g. to change a tube into a vortex tube can.
- FIG. 1 is a front 1 around an extractor hood, the underside of which is designated by 8 is generated by a front vortex 2, while in Fig. 2 the front 1 by a curved shear or vortex flow 3 is generated.
- 1 and 2 show the difference in an extractor hood arrangement between a front swirl 2 and a curved shear or vortex flow 3, such as when flowing around one curved surface 4 occurs.
- the schematic flow profiles 5 (Fig. 1) and 6 (Fig.
- FIG. 2 shows that the core 48 of the front vertebra 2 rotates rigidly and one towards the outside Shear layer 7 connects, and that when flowing around a curvature surface 4, the 2 a circular profile with the same radius as the core 48 of the Front vortex 2 has, a boundary layer 49 occurs, away from the flow around the wall a shear layer 7 connects.
- the two flow areas 7 and 49 are in FIG. 2 separated by a dashed line.
- the shear layers 7 correspond in their Effect.
- a one is created Front 1 generating convergent flow.
- the front 1 is dynamic, it is through a vortex or shear flow caused.
- FIG. 3 is the production of a front vortex 2 and one Front 1 shown with the help of an edge suction through the suction slot 10. Of the Front vortex 2 is thereby by deflecting one on the front 13 of the hood emerging free jet 9 generated.
- the profile 12 shows that the intake flow 11 before the suction slot 10 merges into the shear layer 7 of the front vortex 2.
- 4 shows an extractor hood with a hood front corresponding to FIG. 3, however, with an additional suction trough 50 and suction through a surface filter 25.
- the steam, haze or the like is either by the Suction slot 10 of the edge suction is detected and suctioned through the edge filter 51, or pushed back on the hood floor and suctioned off through a surface filter 25.
- the blown air flow is indicated by dashed lines, with 26 the circulating air.
- 27 denotes the blow-out slot through which the blowing air 60 leaves the hood.
- the necessary blowing volume flow can also be used in exhaust air mode With the help of throttles 32, 33 in the exhaust line 54 and in the blow duct 15 become. If such an extractor hood is only used for recirculation mode, you can adjustable throttles 32, 33 are omitted.
- the air sucked in through the filter 25 occurs either as circulating air 26 through one or more slots 58, or as blowing air 60 through the blowout slot 27. By dimensioning the slots accordingly 58 and 27, the ratio of circulating air 60 to blowing air 26 is determined.
- the blown air 15 flows longitudinally out of the blow-out duct a curved surface 14 in the form of an edge suction and forms the front 1.
- the curved surface 14 has openings 16 which are created by boundary layer suction improve the sticking of the beam, so under the influence destabilizing Vapor flows make larger deflections possible.
- the blowing air is blown out of the blowing air duct 15 via an inclined plate 17 at an angle a to the blow-out direction.
- the resulting curved shear or vortex flow is indicated by 3.
- a tear-off edge 18 is provided, which generates a release vortex 19 which is on the front 1 acts.
- FIG. 7 A variant of the embodiment according to FIGS. 5 and 6 is shown in FIG. 7.
- FIG. 8 Another variant of an extractor hood according to the invention results from the Fig. 8, in which a surface suction and an edge suction with a blowout can be combined via a curvature or a blowing of a profile.
- a Suction blower 23 sucks through an annular channel 22 with suction slot 10 over a Edge filter 51 air from the haze area.
- Another fan 24 sucks over one Surface filter 25 in the center of the hood air from the haze area and blows it Air through the blow duct 15 to the blowout slot 27.
- Such an embodiment an extractor hood is particularly suitable for the extraction of oil-containing Steaming - the oil can condense in the gutter 28.
- the blowers 23 and 24 have separate suction chambers 29, the space between the vortex housing 24 and the filter 25, and the ring channel 22. As shown in Figure 8a by section A-A, this has Extractor hood approximately semicircular in shape.
- Vortex blower 24 and suction blower 23 are fed from a common suction chamber 30.
- Vortex blower 24 and suction blower 23 are fed from a common suction chamber 30.
- FIGS. 11 and 11a show an extractor hood, as shown in FIG. 8, a rectangular hood being shown in FIG. 11, which has interruptions 38 of the suction slot 10 of the edge suction.
- the illustration according to FIG. 12 shows a surface filter 25, the tongues or wave crests 40, which result in a convergence 41 of the intake flow, as well as recesses or troughs 55 arranged therebetween, which result in a divergence 42 of the intake flow.
- FIGS. 13 and 13a The course of the flow due to undulations of a curved front of the hood 13 is shown in FIGS. 13 and 13a.
- the latter shows the underside of a hood
- Fig. 13 is a vertical section of the hood front 13 and the Blown air duct 15 shows.
- the blow-out flow 47 flowing through the blow air duct 15 is reflected in the deflection 43 of the wave crest 57 of the hood front 13 and directed towards the center lines 44 of the troughs, so that along this line a convergence 41 occurs under the hood.
- In the center lines 45 of the wave valleys 56 creates a divergence 42.
- the helical longitudinal vortices 46 generated below the Hoods are schematic on the extension of the center lines of the wave crests shown.
- the embodiment according to FIGS. 14 and 15 relates to an extractor hood Coanda effect, which has a rectangular cross section and which in Fig. 14 as Recirculated air hood is formed.
- the hood 61 is on the hood front 62 Outlet opening for the blowing air on the hood bottom 64 at a distance from the front edge or offset to the rear at a distance of e.g. 50 mm arranged.
- the blow-out gap 63 has a slot width of about 4 - 5 mm and is blown to the rear by a Pipe 65 limits that, in a special embodiment, a pipe diameter of 38 mm.
- the blowing speed of the blown air is this Embodiment 2 - 3 m / sec.
- the double jet extractor hood shown schematically in FIG. 16 has two of them separate blow-out channels 71, 72, the blow jets 73, 74 downwards and downwards Straighten inside and create a curved shear or vortex flow.
- the two Exit points of the blow-out channels are spaced apart from one another in terms of their height or staggered.
- FIG. 17 shows a modified embodiment of an extractor hood with a Coanda effect 14 and 15, in which a blowing edge on the front and the Side edges without a discharge opening is shown.
- the hood 80 according to FIG. 17 has Blower 81, a surface filter 82 in the middle area, edge filter 83 and an edge suction with suction slots 84.
- the filter elements 82, 83 are on one Extension of the blow-out duct attached behind the edge suction slots.
- FIG. 18a, 18b and 18c show different embodiments of Coanda vortex hoods with edge suction in supervision, namely FIG. 18a with side edge suction, Figure 18b with a U-shaped edge suction and Figure 18c without a central Suction.
- the hood 85 has a front vortex generator 86, a middle one Surface filter 87, edge filter 88 and suction slots 89.
- FIGS Extractor hoods illustrated by Der Inventing, the curvilinear shear currents use to create a front.
- Figure 19a shows the basic application of the Coanda effect
- Figure 19c a two-jet version of the application of the Coanda effect.
- the embodiment according to FIG. 19b shows a double-jet version of the Use of the Coanda effect.
- a reshaping of the semicircular element 19b into a profile results in a combination of a flow around the profile body (e.g. according to Figure 9) with the simple Coanda effect according to Figure 19c.
- the usage of a second jet can either over the entire blow-out length or only on the Places where the flow should fit particularly well.
- FIG. 19c a Combination with a blown profile, as shown in Figure 19c, can by a free jet can be spoken, which after a short running distance at Flow around the profile becomes a wall jet.
- the common characteristic of Front vortex generators of Figures 19 is that the flow through the "wall effect" is redirected.
- the use of a second wall jet corresponding to Figure 19b stabilizes the beam deflection so that the beam adheres better to the underside of the hood (see Figure 21).
- the hood 90 is here each with a blow-out channel 21, Intake slots 92, curved blow jet guide 93, surface filter 94, Coanda profile body 95, wing profile body 96 and double blow duct 97 shown.
- the embodiment according to FIG. 20 shows a flow around a tube which abuts a surface.
- This tube is the flow body of a frontal swirl hood.
- the area is the underside of an extractor hood.
- the pipe is leveled towards the edge or profiled. This profiling is decreasing towards the outside, and the leveling is getting steeper, until only the pipe as a flow body is present on the inside.
- the Profiling takes place on the outside as a straight continuation 101 of a tangent 102 to the Curvature of the pipe.
- This continuation 101 becomes the inside of the Blow-out device increasingly shortened, as indicated at 103.
- the transition 104 is the area where the straight filler in the bend of the pipe merges, the surfaces 101, 102, 103 delimit this spatula body.
- the area 103 is the continuation of the underside of the hood.
- a second wall jet is applied to the hood 105 blown out, which acts as a kind of adhesive jet.
- a flow around tube 106 has on the sides in The interior of the hood has an inlet 107 for the air of the adhesive jet. Below the hood 105, a slot 108 is provided as an exit point for the adhesive jet.
- the adhesive jet can to be directed inwards. However, it can also continue the frontal vertebra or the curved shear flow via an additionally generated longitudinal vortex be provided at the ends of the blow-out device.
- the stabilization of the blowing flow by setting, boundary layer extraction, proximity of the extraction surface or by an adhesive jet can also be found at other critical points on the blow-out device deploy.
- FIG. 22 shows a vortex tube 110, in which one radial and one axial Flow are increasingly merged, creating this flow at the exit point becomes a rotating beam.
- This current is a continuation of one Blow-out flow suitable.
- a flow around pipe 111 is provided, on the pipe Outside the vortex tube 110 connects.
- the flow around tube 110 is simultaneous Air supply for the vortex tube 110.
- the air for the vortex tube comes from the Blow room 112 (this is the space above the hood floor) of the hood and arrives through the opening 1 13 in the tube 111 through the inlet 1 14 in the vortex tube 110.
- the exit from the Vortex tube 110 shown off-center in the truncated cone, so that the outlet below of the hood base.
- the vortex tube can also slant down into the Space below the hood floor, and the truncated cone that the Converging the flow can point in the desired direction.
- the direction of rotation of the frontal vertebra and the longitudinal vertebra is chosen so that the longitudinal vertebra a continuation of the frontal vertebra or the front-generating, curved Shear flow represents at the corners.
- the vortex tube 110 is particularly suitable to in the case of angular hoods, continue the frontal flow structure on the sides.
- the Swirl tube can also be used for semi-ring-shaped hoods, the flow around hollow bodies, usually a tube, expediently in a vortex tube transforms.
- FIG. 23 The curved one Element 116 is the top view of a curved tube that acts as an overblown round body referred to as. At the ends of this curved tube they close Vortex tubes.
- the illustration according to FIG. 23 points towards the top opened hood. The outgoing from the outlet openings of the vortex tubes Longitudinal vortices are visible through the suction opening 117.
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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)
- Prevention Of Fouling (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
- Fig. 1
- eine Prinzipdarstellung der Erzeugung einer Front durch Frontwirbel,
- Fig. 2
- eine Prinzipdarstellung der Erzeugung einer Front durch eine Wirbel- bzw. Scherströmung,
- Fig. 3
- eine Prinzipdarstellung einer Haubenvorderseite mit Blasstrahl und Randabsaugung,
- Fig. 4
- eine Prinzipdarstellung einer Abzugshaube mit Blasstrahl, Randabsaugung, Absaugmulde und Flächenabsaugung,
- Fig. 5
- eine Prinzipdarstellung einer Haubenvorderseite mit gekrümmter Blasstrahlführung und mit Grenzschichtabsaugung,
- Fig. 6
- eine Prinzipdarstellung einer Haubenvorderseite mit schräger Blasstrahlführung und mit Abrißkante,
- Fig. 7
- eine Prinzipdarstellung einer Haubenvorderseite mit Blasstrahlführung über eine vertikale und anschließende gekrümmte Fläche,
- Fig. 8
- eine Prinzipdarstellung einer Dunstabzugshaube mit gekrümmter Blasstrahlführung, mit Absaugmulde, mit Randabsaugung und Absaugringkanal,
- Fig. 8a
- eine Aufsicht auf die Darstellung nach Fig. 8 längs der Schnittlinie A-A,
- Fig. 9
- eine Haubenanordnung mit gemeinsamem Ansaugraum für Wirbelgebläse und Absauggebläse mit Freistrahlabsaugung über einen Profilkörper,
- Fig. 10a, 10b und 10c
- eine halbkreisförmige, eine kreisförmige und eine halbellipsenförmige Grundform einer Dunstabzugshaube mit jeweils umgebender Front.
- Fig. 11
- eine Dunstabzugshaube mit Randabsaugung und Unterbrechungen im Ansaugspalt,
- Fig. 11a
- eine Aufsicht auf die Darstellung nach Fig. 11,
- Fig. 12
- eine zungenförmige Absaugfläche zur Ausbildung von Konvergenz- und Divergenzbereichen,
- Fig. 13
- eine Darstellung der Haubenvorderkante und des Ausblasschlitzes mit Wellung im Seitenschnitt,
- Fig. 13a
- die Darstellung der Fig. 13 in einer Ansicht von unten,
- Fig. 14
- eine schematische Darstellung einer Dunstabzugshaube mit Coandaeffekt in seitlicher Schnittdarstellung,
- Fig. 15
- eine Dunstabzugshaube mit Coandaeffekt in Schnittansicht von vorne,
- Fig. 16
- eine schematische Darstellung eines Haubenvorderrandes mit Doppelblasstrahl in seitlicher Schnittansicht,
- Fig. 17
- eine abgeänderte Ausführungsform einer Haube nach den Figuren 14 und 15,
- Figuren 18a - 18c
- weitere Ausführungsfomen von Hauben mit Randabsaugung,
- Figuren 19a - 19c
- Prinzipdarstellungen von Dunstabzugshauben unterschiedlicher Ausführung mit gekrümmten Scherströmungen zur Erzeugung einer Front,
- Fig. 20
- eine Prinzipdarstellung eines Ausführungsbeispiels eines umströmten Profilkörpers als Rohr,
- Fig. 21
- eine weitere Ausgestaltung eines umströmten Rohres mit zweitem Wandstrahl,
- Fig. 22
- eine andere Ausführungsform eines umströmten Rohres mit Wirbelrohr, und
- Fig. 23
- eine Prinzipdarstellung eines Wirbelrohres für eine halbrunde Haube.
Die Darstellung nach Fig. 12 zeigt einen Flächenfilter 25, der Zungen oder Wellenberge 40, die eine Konvergenz 41 der Ansaugströmung ergeben, sowie dazwischen angeordnete Vertiefungen oder Wellentäler 55 aufweisen, die eine Divergenz 42 der Ansaugströmung ergeben.
Claims (30)
- Verfahren zum Eingrenzen, Erfassen und Absaugen von Dunst, Staub mit Hilfe von Absaugeinrichtungen, vorzugsweise Dunstabzugshauben, bei dem der Dunst oder Staub von einem Ansauggebläse durch eine Filtervorrichtung über Luftkanäle angesaugt und im vorderen unteren Haubenbereich eine dem aufsteigenden Dunst entgegenwirkende Luftströmung erzeugt wird,
dadurch gekennzeichnet, daßa) im Bereich der Haubenvorderseite (13) der ausgeblasene Strahl (9) in eine gekrümmte Scherströmung umgelenkt wird,b) die Ausblasströmung wahlweise durch Absaugung oder durch Wandwechselwirkung zu einer Front vor der Ansaugfläche (8) ausgebildet wird,c) der wirksame Ansaugbereich (8) sich nach abwärts über einen Teil der Strecke bis zur Arbeitsplatte erstreckt, undd) der ausgeblasene Strahl durch Zusammenwirken mit der Haubenunterkante eine den Dunst abschirmende Front und eine den Dunst an die Ansaugstellen transportierende Wirbelströmung erzeugt. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß Gebläseluft über eine Formfläche (4; 14; 21; 50; 95, 96, 97) tangential oder schräg in den Dunstraum ausgeblasen wird, derart, daß unterhalb des Haubenbodens (8) die umgelenkte, gekrümmte Scher- bzw. Wirbelströmung (3) und eine den Dunst eingrenzende Front (1), sowie eine den Dunst an die Absaugflächen transportierende Wirbelströmung (3) erzeugt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine profilierte (gekrümmte oder kombiniert gerade/gekrümmte) Fläche (4; 15, 17) durch einen Freistrahl (9) aus der Haube angeblasen und umgelenkt wird, derart, daß eine den Dunst unterhalb der Haube eingrenzende Front (1) und eine den Dunst erfassende und den Absaugflächen (8; 25; 94) zuführende Wirbelströmung (3) entsteht.
- Verfahren nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, daß die umgelenkte, gekrümmte Scher- bzw. Wirbelströmung (3) bzw. der umgelenkte Freistrahl (9) mit einer Randabsaugung (10) kombiniert wird.
- Verfahren nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß die aus der Haube austretende Blasluft (15) in einem etwa vertikalen Freistrahl (9; 27) und einem etwa horizontalen Wandstrahl über eine profilierte, gekrümmte oder eine kombinierte gekrümmte/ebene Fläche (50) geführt wird (Fig. 7).
- Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß an den Kanten der Haube (80) eine Randabsaugung (83) mit oder ohne Mittenabsaugung vorgenommen wird, die in Form einer Schlitzabsaugung (84) ausgebildet ist, wobei die Filter (82, 83) in einer Erweiterung des Ausblaskanales angeordnet sind.
- Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß die Ausblasvorrichtung geschränkt ist, um an ihren Ecken, Enden oder Unstetigkeiten ein stabileres und engeres Anliegen der Strömung zu erreichen.
- Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß an den Ecken, Enden oder Unstetigkeiten der Ausblasvorrichtung eine Grenzschichtabsaugung vorgenommen wird, wodurch ein stabileres und engeres Anliegen der Strömung erreicht wird.
- Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß in der Nähe der Ecken, Enden oder Unstetigkeiten der Ausblasvorrichtung eine Absaugfläche positioniert ist, die eine stabilere und enger anliegende Ausblasströmung ergibt.
- Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß in der Nähe der Ecken, Enden oder Unstetigkeiten der Ausblasvorrichtung ein zweiter Strahl (97) ausgeblasen wird, der ein besseres Haften der Strömung ergibt (Fig. 19b).
- Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß an den Ecken oder Enden der Ausblasvorrichtung Wirbelrohre (110) so angeordnet sind, daß der von den Wirbel rohren erzeugte Längswirbel (115) eine Fortführung der Blasströmung darstellt und eine zu den Absaugflächen hin gerichtete Wirbelströmung erzeugt, um die Strömung zu stabilisieren.
- Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß zur Erzielung eines stabileren und engeren Anliegens der Strömung an den Seiten bzw. Ecken einer Dunstabzugshaube die Dicke des Ausblasschlitzes nach außen reduziert wird.
- Dunstabzugshaube zur Durchführung des Verfahrens nach einem der Ansprüche 1 - 12, dadurch gekennzeichnet, daß im Bereich der Haubenvorderseite (13) eine Vorrichtung (2; 4; 14; 17) zum Umlenken des aus der Haube austretenden Blasluftstromes (15) in eine gekrümmte Scher- bzw. Wirbelströmung (3) vorgesehen ist, und daß der ausgeblasene Strahl (15) durch Umlenken der Scher-bzw. Wirbelströmung (3) durch Zusammenwirken mit der Haubenunterkante (8) eine den Dunst abschirmende Front (1) und eine den Dunst an die Ansaugstellen transportierende Wirbelströmung (3) ausbildet.
- Dunstabzugshaube nach Anspruch 13, dadurch gekennzeichnet, daß zur Erzielung einer Front (1) am Blasluftaustritt auf der dem Dunstbereich zugeordneten Seite der Haube eine gekrümmte oder kombinierte gekrümmte/ebene Fläche (4; 14; 21; 50; 95, 96, 97) vorgesehen ist, die den nach unten austretenden Blasluftstrom in einen gekrümmten oder kombiniert gekrümmten/geradlinigen Scherstrom unterhalb des Hauben bodens (8) umwandelt.
- Dunstabzugshaube nach Anspruch 14, dadurch gekennzeichnet, daß die gekrümmte oder kombiniert gekrümmte/geradlinige Fläche Kreissegmentform hat.
- Dunstabzugshaube nach Anspruch 14, dadurch gekennzeichnet, daß die Fläche eine gekrümmte, profilierte Fläche (4; 14; 50) ist.
- Dunstabzugshaube nach Anspruch 14, dadurch gekennzeichnet, daß die Fläche eine schräg angestellte ebene Platte (17) mit gekrümmter Anschlußfläche ist.
- Dunstabzugshaube nach einem der Ansprüche 14 - 17, dadurch gekennzeichnet, daß die Fläche eine Kombination aus einer geraden angeströmten Platte (17) und einer daran anschließenden gekrümmten bzw. schräg angestellten Fläche (50) ist.
- Dunstabzugshaube nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß am gewölbten Blasluftaustritt ein Profil (21; 96, 97), insbesondere ein Tragflügelprofil, im Strömungsweg des austretenden Freistrahles so angeordnet ist und angeströmt wird, daß eine gekrümmte Scher- bzw. Wirbelströmung (3) und eine Front (1) erzeugt wird. (Fig. 19).
- Dunstabzugshaube nach einem der Ansprüche 13 - 19, dadurch gekennzeichnet, daß vom Blasluftaustritt (9) beabstandet im Haubenboden ein Ansaugschlitz (10) vorgesehen ist und daß die Ansaugströmung so gerichtet ist, daß sie die Front (1) gegen den Dunststrom richtet (Fig. 3).
- Dunstabzugshaube nach Anspruch 13, dadurch gekennzeichnet, daß an den Ansaugschlitz (10) anschließend der Haubenboden eine nach innen und oben gekrümmte Ansaugmulde (50) aufweist, die eine Verengung des Ansaugkanals zum Filter (52) ausbildet (Fig. 4).
- Dunstabzugshaube nach Anspruch 14, dadurch gekennzeichnet, daß dem Ansaugschlitz (10) im Ansaugkanal ein Randfilter (51) zugeordnet ist (Fig. 4).
- Dunstabzugshaube nach Anspruch 14, dadurch gekennzeichnet, daß der Ausblaskanal (50) gekrümmt, insbesondere kreisförmig gekrümmt und nach unten sich verengend ausgebildet ist, und daß der Ansaugkanal (10) Teilringform hat sowie einen Randfilter (51) aufnimmt (Fig. 8).
- Dunstabzugshaube nach einem der Ansprüche 13 - 23, dadurch gekennzeichnet, daß zur Einstellung des Volumenstromes Drosseln (32, 33) im die Ausblasströmung führenden Blaskanal (60) und im die Ansaugströmung führenden Abluftkanal (54) angeordnet sind (Fig. 4).
- Dunstabzugshaube nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß die Haubenvorderseite als sich am Austritt verengender, gekrümmter Blaskanal (53) ausgebildet ist, dessen innere Begrenzungswand (4) teilkreisförmigen Querschnitt hat, daß der Blasstrom entlang der Außenseite der inneren Begrenzungswand (4) strömend den gekrümmten Scherstrom (3) und die Front (1) ausbildet, und daß die Begrenzungswand (4) n den Flächenfilter (25) übergeht (Fig. 7).
- Dunstabzugshaube nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß in der teilkreisförmigen Begrenzungswand (14) Durchströmöffnungen (16) zur Grenzschichtabsaugung vorgesehen sind (Fig. 5).
- Dunstabzugshaube nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß an die Innenseite des gekrümmten Blaskanals eine etwa vertikale ebene Fläche (53) zur Aus-bildung eines Wandstrahls (20) anschließt, die in die gekrümmte Fläche (4) mit teilkreisförmigem Querschnitt übergeht.
- Dunstabzugshaube nach Anspruch 13 oder 14, dadurch gekennzeichnet, daß die Haubenvorderseite als sich am Austritt verengender gekrümmter Blaskanal (15) ausgebildet ist, dessen innere Begrenzungswand eine nach unten und innen geneigte (Winkel α) verlaufende ebene Platte (17) mit einer Abreißkante (18) ist, an die sich eine nach innen gekrümmte Fläche (4) anschließt, die in den Flächenfilter (25) übergeht, derart, daß unterhalb der Platte eine gekrümmte Scherströmung (3) und an der gekrümmten Fläche ein Ablösewirbel (19) entsteht (Fig. 6).
- Dunstabzugshaube nach Anspruch 13, dadurch gekennzeichnet, daß das Ansauggebläse (25) und das Blasluftgebläse (24) mit einem gemeinsamen Ansaugraum (30) hinter den Filterflächen (23, 24) verbunden sind (Fig. 9).
- Dunstabzugshaube nach Anspruch 13, dadurch gekennzeichnet, daß das Ansauggebläse (25) und das Blasluftgebläse (24) mit getrennten Ansaugräumen (29) verbunden sind (Fig. 8).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19613513 | 1996-04-04 | ||
DE19613513A DE19613513A1 (de) | 1996-04-04 | 1996-04-04 | Verfahren zum Eingrenzen, Erfassen und Absaugen von Dunst, Staub oder dergleichen sowie Einrichtung zur Durchführung des Verfahrens |
PCT/DE1997/000669 WO1997038266A2 (de) | 1996-04-04 | 1997-04-02 | Verfahren zum eingrenzen, erfassen und absaugen von dunst, staub oder dgl. sowie einrichtung zur durchführung des verfahrens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0891519A2 EP0891519A2 (de) | 1999-01-20 |
EP0891519B1 true EP0891519B1 (de) | 1999-09-29 |
Family
ID=7790479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97920575A Expired - Lifetime EP0891519B1 (de) | 1996-04-04 | 1997-04-02 | Verfahren zum eingrenzen, erfassen und absaugen von dunst, staub ,sowie einrichtung zur durchführung des verfahrens |
Country Status (6)
Country | Link |
---|---|
US (1) | US6336451B1 (de) |
EP (1) | EP0891519B1 (de) |
AT (1) | ATE185189T1 (de) |
DE (2) | DE19613513A1 (de) |
ES (1) | ES2140975T3 (de) |
WO (1) | WO1997038266A2 (de) |
Cited By (2)
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DE10142787B4 (de) * | 2001-08-31 | 2006-04-13 | Bulthaup Gmbh & Co. Kg | Absaugvorrichtung |
DE102006055001A1 (de) * | 2006-11-17 | 2008-05-21 | Bohner Produktions Gmbh | Dunstabsaugeinrichtung |
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DE2340533A1 (de) | 1973-08-10 | 1975-03-06 | Collo Rheincollodium Koeln Gmb | Umluftfiltergeraet, insbesondere kuechendunstumlufthaube |
US4043319A (en) * | 1975-09-18 | 1977-08-23 | Jensen Donald D | Exhaust hood |
US4153044A (en) | 1978-01-23 | 1979-05-08 | Nett Louis A | Backshelf ventilating hood |
DE3304262C2 (de) | 1983-02-08 | 1986-07-03 | Hannelore 8400 Regensburg Röhl-Hager | Umluft-Abzugshaube |
JPH0711349B2 (ja) | 1986-07-16 | 1995-02-08 | 松下精工株式会社 | レンジフード |
US4982293A (en) | 1988-06-02 | 1991-01-01 | Ricoh Company, Ltd. | Method of compressing halftone image data |
DE3918870C2 (de) | 1989-06-09 | 1995-06-29 | Roehl Hager Hannelore | Verfahren und Einrichtung zum Absaugen von Dämpfen und Dunststoffen |
DE4203916C1 (de) * | 1992-02-11 | 1993-04-29 | Hannelore 8400 Regensburg De Roehl-Hager |
-
1996
- 1996-04-04 DE DE19613513A patent/DE19613513A1/de not_active Withdrawn
-
1997
- 1997-02-04 US US09/147,084 patent/US6336451B1/en not_active Expired - Lifetime
- 1997-04-02 DE DE59700509T patent/DE59700509D1/de not_active Expired - Lifetime
- 1997-04-02 EP EP97920575A patent/EP0891519B1/de not_active Expired - Lifetime
- 1997-04-02 ES ES97920575T patent/ES2140975T3/es not_active Expired - Lifetime
- 1997-04-02 WO PCT/DE1997/000669 patent/WO1997038266A2/de active Application Filing
- 1997-04-02 AT AT97920575T patent/ATE185189T1/de active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10142787B4 (de) * | 2001-08-31 | 2006-04-13 | Bulthaup Gmbh & Co. Kg | Absaugvorrichtung |
DE102006055001A1 (de) * | 2006-11-17 | 2008-05-21 | Bohner Produktions Gmbh | Dunstabsaugeinrichtung |
Also Published As
Publication number | Publication date |
---|---|
DE19613513A1 (de) | 1997-10-09 |
WO1997038266A2 (de) | 1997-10-16 |
WO1997038266A3 (de) | 1997-12-11 |
US6336451B1 (en) | 2002-01-08 |
ES2140975T3 (es) | 2000-03-01 |
EP0891519A2 (de) | 1999-01-20 |
ATE185189T1 (de) | 1999-10-15 |
DE59700509D1 (de) | 1999-11-04 |
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