EP1448934A1 - Appareil de cuisson a soufflante et arrivee d'eau - Google Patents

Appareil de cuisson a soufflante et arrivee d'eau

Info

Publication number
EP1448934A1
EP1448934A1 EP02785416A EP02785416A EP1448934A1 EP 1448934 A1 EP1448934 A1 EP 1448934A1 EP 02785416 A EP02785416 A EP 02785416A EP 02785416 A EP02785416 A EP 02785416A EP 1448934 A1 EP1448934 A1 EP 1448934A1
Authority
EP
European Patent Office
Prior art keywords
water
radial impeller
atomizing element
radial
cooking
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
Application number
EP02785416A
Other languages
German (de)
English (en)
Other versions
EP1448934B1 (fr
Inventor
Peter Helm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MKN Maschinenfabrik Kurt Neubauer GmbH and Co KG
Original Assignee
MKN Maschinenfabrik Kurt Neubauer GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MKN Maschinenfabrik Kurt Neubauer GmbH and Co KG filed Critical MKN Maschinenfabrik Kurt Neubauer GmbH and Co KG
Publication of EP1448934A1 publication Critical patent/EP1448934A1/fr
Application granted granted Critical
Publication of EP1448934B1 publication Critical patent/EP1448934B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising

Definitions

  • the invention relates to a cooking device with a cooking space, with one or more heating elements, with a blower having a radial impeller with a blade area, with a disc-shaped, axially symmetrical atomizing element rotating with the radial impeller, and with a water supply which has at least one water outlet which Water on the atomizing element.
  • Cooking appliances are also increasingly being equipped with a steam generator system in order to improve the cooking results with the help of the moist cooking chamber air that then arises.
  • Such cooking devices are, for example, combi steamers, ovens or hot air devices. They are used in particular to prepare food for consumption.
  • the steam is not directed into the cooking space from the outside, but is generated directly in the cooking space.
  • water is fed into the cooking space and distributed there in various forms and thereby evaporated and through the hot environment.
  • water supply lines are used according to concepts from, for example, EP 0 233 535 B1, EP 0 383 366 B1 or EP 0 640 310 B1, which bring the water onto the hub of the fan of a circulation fan.
  • the centrifugal force directs the water from the hub to the impeller blades, wherever possible the water is broken down into droplets, which should then evaporate in the hot cooking chamber atmosphere.
  • the cooking chamber atmosphere is heated by electrical heating elements or also by heat exchanger tubes, in which a hot medium flows, and which thus also act as a heating element.
  • electrical heating elements or also by heat exchanger tubes, in which a hot medium flows, and which thus also act as a heating element.
  • these heating elements are usually installed in the immediate flow field of the impeller.
  • a disadvantage of all of the aforementioned concepts is that the peripheral speed of the hub components described is of course relatively low due to the relatively small hub diameter. This relatively low peripheral speed leads to a relatively low centrifugal force and thus to a non-optimal distribution of the water droplets, which remain relatively large. If one wishes to increase the fan speed or the speed of the fan motor of the fan in order to improve the effect, this leads to higher required motor outputs, which increase the costs both for the cooking device and for its operation and are therefore not desired. The resulting higher air velocities in the cooking space are then neither necessary nor desirable.
  • the object of the invention in contrast, is to propose a generic cooking appliance in which the smallest possible droplet size is obtained by means of a device that is as simple as possible in terms of construction and which can then rapidly evaporate in the hot ambient air and thus achieve high efficiency.
  • the atomizing element has an outer radius that is equal to or greater than that of the inner radius of the blade area of the radial impeller, that the atomizing element is arranged in the axial direction next to the blade area of the radial impeller, and that the water outlet is adjacent to the atomizing element the side facing away from the blade area of the radial impeller is arranged.
  • the atomizing element on the side of the radial impeller wheel that faces away from the adjacent wall of the cooking chamber is preferred.
  • the air flow and the arrangement of the heating elements then lead to a better evaporation effect.
  • the atomizing element is also the cover plate of the radial impeller.
  • radial impellers already have a cover disk that holds these blades together on the side facing away from the cooking chamber wall. It is a perforated plate that has a uniform, circularly symmetrical hole centrally in the area near the axis for the passage of the cooking chamber atmosphere, which enters the radial impeller there, in order to be thrown outwards as usual. It does not have to be held on the axis, since it is already connected to the blades in the blade area.
  • this cover disk can now be given the additional task of collecting the water originating from the water outlet and conveying it outwards centrifugally.
  • cover plate is provided with a radially symmetrical surface structure which forms a circumferential channel.
  • cover disk of the radial impeller is arranged in a radial symmetry at an angle to the base plate that is greater than 5 ° and less than 90 °.
  • BESTATIGUNGSKOPIE An exemplary embodiment of the invention is explained in more detail below with reference to the accompanying drawing. Show it:
  • FIG. 1 shows a section through a schematic view of a cooking appliance according to the invention.
  • FIG. 2 shows an enlarged illustration of the cover disk of the radial impeller from the embodiment in FIG. 1.
  • a cooking appliance for example a combi steamer, an oven or other hot air appliance, is shown schematically in section from the user's point of view in FIG. 1.
  • This cooking appliance 10 has a cooking chamber 11.
  • a heating element 12 is provided on the left-hand side, of which only two turns can be seen schematically on average.
  • the cooking chamber 11 can either be heated by electrical heating elements 12 or else by heating elements 12 in the form of heat exchanger tubes in which a hot medium flows. Other devices for generating heat can also be used as heating element 12.
  • a fan 20 is provided in order to distribute the heat generated by the heating element 12 or the air heated by it evenly in the cooking chamber 11.
  • This fan 20 has a fan motor 21 which drives a radial impeller 22 in the cooking space 11.
  • the radial impeller 22 is located within the heating element 12 and is radially surrounded by it.
  • the heating elements 12 - whether electrical or in the form of heat exchanger tubes - are generally attached in the immediate flow field of the radial impeller 22. Other arrangements are possible, but this has proven itself.
  • the radial impeller 22 has a base plate 23, on which a plurality of blades 24 are arranged radially to the axis perpendicular to the base plate 23.
  • the base plate 23 of the radial fan wheel 22 is exactly perpendicular to the image plane,
  • the blades 24 can be curved or straight blades, but they essentially extend from the base plate 23 to the right, that is to say parallel to the axis of the radial impeller 22.
  • the blades 24 do not start on the axis, but leave the central area free, so that air can flow in parallel to the axis. This is at the same time the suction area of the radial impeller 22.
  • the blade area is therefore between an inner radius, at the same time the outer radius of the suction area, and an outer radius and is occupied by the blades 24.
  • the outer radius also corresponds approximately to the radius of the base plate 23.
  • cover disk 25 To mechanically stabilize the blades 24, they are supported on their side facing away from the base plate 23 by a cover disk 25.
  • This cover plate 25 is flat in conventional radial impellers.
  • the cover disk 25 of the radial impeller 22 shown is a flat disk which is perpendicular to the axis of the radial impeller 22.
  • the cover disk 25 is provided with a hole in the center, and it also extends approximately from the inner to the outer radius of the blade area.
  • a water supply 30 This feeds water via a water meter 31 and a water supply line 32 into the cooking space 11. Water is released at the water outlet 33, in the vicinity of the cover plate 25 of the radial impeller 22 Unlike in the prior art, the water outlet 33 is therefore not arranged inside or between the base plate 23 and the cover disk 25, but outside the radial impeller 22 adjacent to that side of the cover disk 25 which faces away from the blades 24.
  • the cover plate 25 is thus identical to the atomizing element.
  • the cover plate 25 rotates together with the other parts of the radial impeller 20 around the axis.
  • the peripheral speed of these components, including the cover plate 25, causes the water, which is now on the outside of the cover plate 25, to flow radially outward and to accelerate there.
  • the water thus flows outward on the cover plate 25, that is, with the cover plate 25 rotating in FIG. 1 upwards, downwards, towards or away from the viewer, specifically each water molecule, but all at the same time.
  • the cover plate 25 is not just a flat plate.
  • the cover plate 25 is provided with a surface structure, in particular with a type of channel. This channel optimizes the absorption of the water from the water outlet 33.
  • the geometry from FIG. 2 is to be presented in each case radially symmetrically around the axis of the radial impeller 22.
  • the channel is circular all round.
  • the water released from the water outlet 33 onto the outside of the cover plate or the atomizing element 25 has no possibility of getting into the radial impeller 22.
  • the centrifugal force which is exerted on the water droplets adhering to it by rotating the cover disk 25 must always be taken into account. This is substantially greater than the other forces, for example the force of gravity that wants to move the water droplets downwards, or the additional force exerted by the flow of the gas along the flow arrows 13 that would like to pull the water droplets inward into the blower.
  • the water coming from the direction of the water outlet 33 is optimally absorbed by the contour, structure or channel on or in the cover plate 25 and then distributed on the cover plate 25 with the aid of the centrifugal forces.
  • the contour shown is only one way of designing. Care is preferably taken to ensure that it is attached symmetrically all around in order to achieve a uniform, radially symmetrical distribution of the water droplets. Likewise, a geometry is preferred that tends to prevent the water from following the flow arrows 13 into the interior of the radial impeller 22 between the base plate 23 and the cover plate 25.
  • a particularly preferred shape is obtained when the cover disk 25 has an angle ⁇ with the base plate 23 of the radial impeller 22 in a radially symmetrical manner.
  • This angle a corresponds to the angle 90 ° -ß, which the surface of the cover plate 25 then encloses with the axis of the radial impeller 22.
  • This angle is shown schematically in FIG. Due to the centrifugal forces F z acting radially outward from the axis of the radial impeller 22, a contact force F a is created for the water on and against the cover plate 25.
  • the thickness of the water film is also reduced and even smaller drops are formed when the water film is torn off. This in turn is advantageous for the formation of steam.
  • angle a is relatively uncritical for the development of the effect, but the angle a is preferably greater than 5 ° and less than 90 °. This means that the angle ⁇ is preferably less than 85 ° and greater than 0 °.
  • the inner radius of the atomizing element 25 or the cover disk is such that it protrudes inward beyond the blade area, that is to say it projects into the exit area or modifies its outer radius somewhat, that is to say narrows it.
  • the air flow must therefore pass through a slightly smaller opening than without
  • BESTATIGUNGSKOPIE dust element 25 This leads to better overall flow behavior and to a more uniform distribution and acceleration of the water film.
  • 25 atomizing element in the embodiment also cover disc of the radial impeller

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un appareil de cuisson comprenant une chambre de cuisson (11) et un ou plusieurs éléments de chauffage (12). De plus, il comprend une soufflante (20) qui présente une roue de soufflante radiale (22) ainsi qu'un élément pulvérisateur solidaire en rotation de cette dernière (22). Une arrivée d'eau (30) présente au moins une sortie d'eau (33), qui fournit de l'eau à l'élément pulvérisateur (25). De ce fait, une évaporation d'eau se produit, ceci permettant la création d'une chambre de cuisson humide. Ledit élément pulvérisateur est un élément en forme de disque, symétrique par rapport à un axe, dont le rayon extérieur est supérieur ou égal au rayon intérieur de la partie pale de la roue de soufflante radiale (22). Ledit élément pulvérisateur est disposé dans le sens axial à proximité de la roue de soufflante radiale, et la sortie d'eau (33) est adjacente audit élément pulvérisateur (25) à l'extérieur de la roue de soufflante radiale (22).
EP02785416A 2001-11-29 2002-11-29 Appareil de cuisson a soufflante et arrivee d'eau Expired - Lifetime EP1448934B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10158425A DE10158425C1 (de) 2001-11-29 2001-11-29 Gargerät mit Gebläse und Wasserzufuhr
DE10158425 2001-11-29
PCT/EP2002/013508 WO2003046438A1 (fr) 2001-11-29 2002-11-29 Appareil de cuisson a soufflante et arrivee d'eau

Publications (2)

Publication Number Publication Date
EP1448934A1 true EP1448934A1 (fr) 2004-08-25
EP1448934B1 EP1448934B1 (fr) 2008-01-16

Family

ID=7707305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02785416A Expired - Lifetime EP1448934B1 (fr) 2001-11-29 2002-11-29 Appareil de cuisson a soufflante et arrivee d'eau

Country Status (4)

Country Link
US (1) US7325481B2 (fr)
EP (1) EP1448934B1 (fr)
DE (2) DE10158425C1 (fr)
WO (1) WO2003046438A1 (fr)

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WO2005052452A1 (fr) 2003-11-26 2005-06-09 Mkn Maschinenfabrik Kurt Neubauer Gmbh & Co. Appareil de cuisson a systeme d'alimentation en eau
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DE102009000275B4 (de) * 2009-01-16 2025-03-13 BSH Hausgeräte GmbH Gargerät mit Zerstäubungseinrichtung
DE102010000330A1 (de) * 2010-02-05 2011-08-11 Maier, Max, 71636 Backofen
US9775459B2 (en) * 2011-07-25 2017-10-03 Convotherm Elektrogeraete Gmbh Cooking device
DE102012109631A1 (de) * 2012-10-10 2014-04-10 Miele & Cie. Kg Gargerät mit einer Dampferzeugungseinrichtung
US9372005B2 (en) 2012-11-30 2016-06-21 Alto-Shaam, Inc. Heat exchanger for oven
EP2999999A4 (fr) 2013-05-23 2017-03-29 Duke Manufacturing Co. Appareil et procédés de préparation d'aliment
US10918112B2 (en) 2013-05-23 2021-02-16 Duke Manufacturing Co. Dough preparation apparatus and methods
US9357787B2 (en) * 2013-06-27 2016-06-07 Middleby Marshall Holdings Llc Forced moisture evacuation for rapid baking
DE102016215650A1 (de) * 2016-08-19 2018-02-22 BSH Hausgeräte GmbH Haushaltsgargerät
DE202018006410U1 (de) 2017-08-09 2020-04-23 Sharkninja Operating Llc Kochgerät und Komponenten davon
USD914447S1 (en) 2018-06-19 2021-03-30 Sharkninja Operating Llc Air diffuser
USD883015S1 (en) 2018-08-09 2020-05-05 Sharkninja Operating Llc Food preparation device and parts thereof
USD883014S1 (en) 2018-08-09 2020-05-05 Sharkninja Operating Llc Food preparation device
USD903413S1 (en) 2018-08-09 2020-12-01 Sharkninja Operating Llc Cooking basket
USD934027S1 (en) 2018-08-09 2021-10-26 Sharkninja Operating Llc Reversible cooking rack
WO2020176477A1 (fr) 2019-02-25 2020-09-03 Sharkninja Operating Llc Système de cuisson avec protection
US20190254476A1 (en) 2019-02-25 2019-08-22 Sharkninja Operating Llc Cooking device and components thereof
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USD918654S1 (en) 2019-06-06 2021-05-11 Sharkninja Operating Llc Grill plate
USD982375S1 (en) 2019-06-06 2023-04-04 Sharkninja Operating Llc Food preparation device
DE102021201764A1 (de) 2020-02-25 2021-08-26 Wilhelm Bruckbauer Vorrichtung zum Erhitzen von Gargut
US11647861B2 (en) 2020-03-30 2023-05-16 Sharkninja Operating Llc Cooking device and components thereof
KR20230079437A (ko) 2020-10-09 2023-06-07 브루크바우어 빌렘 증기를 처리하기 위한 장치
DE102020212824A1 (de) 2020-10-09 2022-04-14 Wilhelm Bruckbauer Vorrichtung zum Reinigen von Wrasen
DE102020212823A1 (de) 2020-10-09 2022-04-14 Wilhelm Bruckbauer Einrichtung zur Behandlung von Wrasen
DE102020212825A1 (de) 2020-10-09 2022-04-14 Wilhelm Bruckbauer Vorrichtung zum Abzug von Kochdünsten
DE102020212822A1 (de) 2020-10-09 2022-04-14 Wilhelm Bruckbauer Einrichtung zur Behandlung von Wrasen
DE102020212827A1 (de) 2020-10-09 2022-04-14 Wilhelm Bruckbauer Verfahren zur Behandlung von Wrasen
DE102020212821A1 (de) 2020-10-09 2022-04-14 Wilhelm Bruckbauer Einrichtung zur Behandlung von Wrasen
DE102020132482A1 (de) * 2020-12-07 2022-06-09 Welbilt Deutschland GmbH Gargerät, insbesondere gewerbliches Gargerät
DE102022204917A1 (de) 2021-05-21 2022-11-24 BORA - Vertriebs GmbH & Co KG Vorrichtung zum Garen von Gargut
DE102022116656B4 (de) 2022-07-04 2025-03-06 Rational Aktiengesellschaft Gargerät
DE102023205653A1 (de) 2023-06-16 2024-12-19 BORA - Vertriebs GmbH & Co KG Garvorrichtung und Verfahren zum Betrieb einer Garvorrichtung

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Also Published As

Publication number Publication date
US20050109215A1 (en) 2005-05-26
WO2003046438A1 (fr) 2003-06-05
DE50211573D1 (de) 2008-03-06
EP1448934B1 (fr) 2008-01-16
DE10158425C1 (de) 2003-09-11
US7325481B2 (en) 2008-02-05

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