EP1687570B1 - Appareil de cuisson a systeme d'alimentation en eau - Google Patents

Appareil de cuisson a systeme d'alimentation en eau Download PDF

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Publication number
EP1687570B1
EP1687570B1 EP04819214A EP04819214A EP1687570B1 EP 1687570 B1 EP1687570 B1 EP 1687570B1 EP 04819214 A EP04819214 A EP 04819214A EP 04819214 A EP04819214 A EP 04819214A EP 1687570 B1 EP1687570 B1 EP 1687570B1
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EP
European Patent Office
Prior art keywords
water
water supply
water storage
cooking appliance
accordance
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.)
Active
Application number
EP04819214A
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German (de)
English (en)
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EP1687570A1 (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
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MKN Maschinenfabrik Kurt Neubauer GmbH and Co KG
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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 appliance with a cooking chamber, with one or more heating elements and with a water supply, which has at least one water outlet and is fed by an external water supply.
  • Cooking appliances are increasingly being equipped with a steam generator system in order to improve the cooking results with the help of the moist cooking air that results.
  • Such cooking appliances are, for example, combi steamers, ovens, steamers or combi steamers. They are used in particular for the preparation of food for consumption.
  • the steam is preferably generated by injecting water directly in the cooking chamber.
  • water is fed into the cooking chamber and distributed there in various forms and thereby evaporated and by the hot environment.
  • a regulation or control of the volume flow of the supplied water is desired.
  • a combi steamer in which the water supply is equipped with a solenoid valve.
  • a temperature measurement is provided in the exhaust chimney.
  • the solenoid valve is actuated to supply water as a function of a measured temperature in the exhaust chimney. Due to the complete shutdown of the water flow but by subsidence or steam absorption of the food but a Unters expedit Trent and thus adversely affect the food.
  • Adjustable solenoid valves are also used in other cases in order to switch the water flow to the cooking chamber on or off. These valves are usually controlled by an electronic control.
  • the volume flow is relatively low and is in practice, depending on the size of the oven between 3 and 25 liters per hour, corresponding to about 1 cm 3 / s to 7 cm 3 / s.
  • the line pressure between 0.2 and 1.0 MPa, that is about 2 and 10 bar.
  • a metering device for fresh water for steam ovens is described. Fresh water is supplied to form steam in steam ovens. In order to precisely meter this fresh water, a metering chamber is arranged between two valves which open and close alternately. This dosing chamber can be filled and emptied by alternately opening and closing the two valves.
  • controllers and valves used must first be adjusted.
  • a disadvantage of the prior art is also that the once set volume flow can be changed only limited by the control electronics. By clocking the solenoid valve, the volume flow can be reduced, but it can not be increased without further.
  • the object of the invention is to propose a generic cooking appliance, in which a better dosage is possible.
  • a cooking appliance with a cooking chamber, with one or more heating elements, with a water supply, which has at least one water outlet and is fed by an external water supply, the water supply having at least two partially parallel water supply lines, each of the water supply lines respectively one or more water buffer with a water-fillable, predetermined interior volume, wherein the water buffer (45a, 45b) are fed from the outer water supply (40), wherein the interior volume of the water buffer or temporarily against filling and temporarily against emptying is blocked, and wherein the water from the interior volume of the water storage tank or via the or the water outlets to generate steam in the oven is emptied.
  • each a water buffer of the two water supply lines are combined with each other so that they form a common water buffer, the interior of which accommodates the two interior volumes, which are separated by the water-emitting piston so that the movement of the piston at the same time leads to an emptying of the interior volume of the one water buffer and to fill the associated other volume of the other water buffer.
  • a control or regulating device which causes a periodic or clocked emptying of the interior volume.
  • the periodic or clocked emptying can be done in constant time steps. In many cases, however, it is also possible to regulate or even control a variable timing. As a result, a change in the volume flow into the cooking chamber can be effected particularly simply and uniformly.
  • the water buffer is designed as a lifting cylinder whose interior volume can be emptied by a piston.
  • Another advantage is when the water buffer is temporarily blocked by a multi-way valve against overfilling and temporarily against emptying.
  • the very pressure-dependent and incalculable water supply from the external water supply is separated by a water buffer from the actual water supply to the cooking chamber.
  • the water buffer is completely filled with water from the external water supply and then separated from this external water supply.
  • the now exactly fixed and precisely defined filled with water volume of the water buffer is then emptied into the cooking chamber to generate steam. It is therefore exactly calculable and predictable, which volume of water is supplied to generate steam.
  • the interior volume is now sized so small that a corresponding timing to a discrete, but almost continuous volume flow leads. Moreover, this volume flow can now also be controlled by increasing or decreasing the clocking to deliver more or less volume of water.
  • a cooking appliance which is not part of the invention, for example, a combi steamer, an oven or other hot air device is seen schematically in section from the user's perspective FIG. 1 shown.
  • This cooking appliance 10 has a cooking chamber 11.
  • a heating element 12 is provided on the left side, of which only two turns can be seen schematically in section.
  • the heating of the cooking chamber 11 can be done either by electric heating elements 12 or by heating elements 12 in the form of heat exchanger tubes, in which a hot medium flows. Other devices for generating heat can be used as a heating element 12.
  • a blower 20 In order to evenly distribute the heat generated by the heating element 12 or the air heated by it in the cooking chamber 11, a blower 20 is provided.
  • This blower 20 has a fan motor 21, which drives a radial fan 22 in the cooking chamber 11.
  • the radial impeller 22 is located within the heating element 12 and is surrounded by this radially.
  • the heating elements 12 - whether electrically or in the form of heat exchanger tubes - are usually in direct flow field of the radial impeller 22 attached. Other arrangements are possible, but this has proven itself.
  • a water supply 30 Another essential element of the combi steamer with steam generator system is a water supply 30. This leads water from an external water supply 40 via an in FIG. 2 water metering device 31 and a water supply line 32 explained in more detail in the cooking chamber 11. Water is discharged at the water outlet 33, in the vicinity of the radial impeller 22.
  • the outlet at the water outlet 33 of the water supply 30 is depressurized or free.
  • the water now reaches a sputtering element (not shown).
  • FIG. 2 On the left you can see the access from an external water supply 40, so for example, the existing water supply to the cooking appliance in the building.
  • the water from this external water supply 40 reaches a water buffer 45, which is formed here by a cylinder.
  • a water buffer 45 In the cylinder of the water buffer 45 is an interior volume 46, which can be filled by the water from the outer water supply 40.
  • valve 47 Between the supply of the external water supply 40 and the water buffer 45 is a valve 47.
  • This valve 47 can be closed at its input 47 'to prevent further supply of water from the external water supply 40 into the water buffer 45, as well Emptying the interior volume 46 in the direction of the external water supply 40 to prevent.
  • the valve 47 is designed here as a 3/2-way valve.
  • the second output 47 '''of the valve 47 leads into the above-mentioned water supply line 32, here a hose leading to the cooking chamber 11, of which only the cooking chamber in the FIG. 2 can be seen.
  • the water supply line 32 ends here with a water outlet 33, get out of the water in the cooking chamber 11, usually in the vicinity of the radial impeller 22, compare the description FIG. 1 ,
  • a piston 48 In the cylinder of the intermediate water reservoir 45 is a piston 48, which can reduce or enlarge the interior volume 46 by its movement or can eject the amount of water contained in the interior volume 46 through the valve 47.
  • the valve 47 is preferably a 3/2-way solenoid valve 47, at the first output 47 "of which a working cylinder is attached as a water buffer 45 with the defined interior volume 46. If the valve 47 is energized, water flows out of the public water supply network as an external water supply 40 via the connecting line, the valve inlet 47 'and the first valve outlet 47 "in the water buffer 45. The piston 48 in the working cylinder is extended due to the applied water pressure.
  • valve 47 closes the water inlet 47 'and the water can, for example by means of spring force 49 on the piston 48, from the cylinder in the second, now open, output 47''' of the solenoid valve 47 are pushed , The water is transported from this outlet 47 '''by means of the hose 32 to the cooking chamber 11. From there it can then be led to the fan 22, where the steam is generated.
  • This embodiment allows periodic water delivery. If the timing is chosen sufficiently short, the water flow is practically continuous. By suitable hose routing in the water supply line 32 to the cooking chamber 11, a continuous flow of water can be achieved. This means a smaller disturbance variable for the temperature controller. If the hose of the water supply line 32 is laid horizontally with a given inner diameter as long a distance that is at least as long that the tube volume is greater than the interior volume 46 of the working cylinder of the intermediate water storage 45, by the periodic operation of the piston 48, the existing tube volume almost filled up. At the end, however, due to the free outlet at the water outlet 33 and the relatively low volume flow, the water level is always the same, namely lower than the hose cross-section, so that there is a continuous flow of water. The hose filling always oscillates between position 41 and 42.
  • a suitable component is attached to the working cylinder of the water buffer 45, for example a Hall sensor 34 and a magnet in the piston 48, and the measured data is output via a schematically indicated line 51 to the regulating or control device 50, then the electronic control unit - Control or control the operation of the Wassmengendostechnik 31 and possibly report a lack of functionality to the operator (lack of water).
  • the water is supplied via two flow-parallel water supply lines 30a and 30b. These can both be fed from the same reservoir.
  • There are also two intermediate water tanks 45a and 45b are provided, which are combined in a common container and each have an interior volume 46a and 46b.
  • Each of the two water buffers 45a and 45b is associated with another of the water supply lines 30a or 30b.
  • the two interior volumes 46a and 46b are separated from each other by one and the same piston 48. A movement of the piston 48 now leads to one of the two interior volumes 46a or 46b emptied, the other, however, is filled.
  • This movement, as well as the opening of the valves 47 can be controlled or regulated by the control or regulating device 50, so that then the content of the two intermediate water tanks 45a, 45b is controlled to the water supply pipe 32 so that it leads practically uniformly and constantly water, as it is desired.
  • FIG. 4 an alternative is shown, which is suitable for both the variant from the FIG. 2 as well as for those from the FIG. 3 It is, however, related to the version FIG. 3 shown.
  • valve 47 instead of a 3/2 way valve 47 more, namely in this case two 2/2-way valves in each of the two water supply lines 30a, 30b are arranged. With such valves can be prevented even safer that inadvertently during the switching phase of the valve water through the valve without contact with the water tank in the direction of cooking chamber can continue to flow.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Commercial Cooking Devices (AREA)
  • Pyridine Compounds (AREA)

Claims (12)

  1. Appareil de cuisson (10),
    avec un espace de cuisson (11),
    avec un ou plusieurs éléments chauffants (12),
    avec une amenée d'eau (30) qui a au moins une sortie d'eau (33) et est alimentée par une alimentation en eau (40) extérieure,
    l'amenée d'eau (30) présentant au moins deux conduites d'amenée d'eau (30a, 30b) s'étendant par endroits parallèlement,
    chacune des conduites d'amenée d'eau (30a, 30b) possédant respectivement un ou plusieurs réservoirs intermédiaires d'eau (45a, 45b) avec un volume d'espace intérieur (46a, 46b) prescrit, pouvant être rempli avec de l'eau,
    les réservoirs intermédiaires d'eau (45a, 45b) étant alimentés par l'alimentation en eau extérieure,
    le volume d'espace intérieur (46) du ou des réservoirs intermédiaires d'eau (45) pouvant être bloqué temporairement par rapport au remplissage et temporairement par rapport au vidage, et
    l'eau pouvant être vidée du volume d'espace intérieur (46) du ou des réservoirs intermédiaires d'eau (45) par le biais de la ou des sorties d'eau (33) pour la génération de vapeur dans l'espace de cuisson (11).
  2. Appareil de cuisson selon la revendication 1,
    caractérisé en ce que
    les réservoirs intermédiaires d'eau (45a, 45b) des deux conduites d'amenée d'eau (30a, 30b) sont combinés l'un à l'autre de sorte qu'ils forment un réservoir intermédiaire d'eau (45) commun, l'espace intérieur duquel recevant les deux volumes d'espace intérieur (46a, 46b) qui sont séparés par le piston (48) repoussant l'eau de sorte que le mouvement du piston (48) entraîne en même temps un vidage du volume d'espace intérieur (46a, 46b) d'un réservoir intermédiaire d'eau (45a, 45b) et un remplissage de l'autre volume d'espace intérieur (46b, 46a) associé de l'autre réservoir intermédiaire d'eau (45b, 45a).
  3. Appareil de cuisson selon la revendication 1 ou 2,
    caractérisé en ce que
    un dispositif de commande ou de régulation (50) est prévu, lequel provoque un vidage périodique ou cadencé du ou des volumes d'espace intérieur (46).
  4. Appareil de cuisson selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les réservoirs intermédiaires d'eau (45a, 45b) sont réalisés comme des cylindres de levage, dont le volume d'espace intérieur (46a, 46b) peut être vidé par un piston (48).
  5. Appareil de cuisson selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les réservoirs intermédiaires d'eau (45a, 45b) peuvent être bloqués au moyen d'une soupape à plusieurs voies (47) temporairement par rapport au remplissage et temporairement par rapport au vidage.
  6. Appareil de cuisson selon la revendication 5,
    caractérisé en ce que
    les soupapes à plusieurs voies (47) sont des soupapes à 3/2 voies commandées électriquement par le dispositif de commande et de régulation (50).
  7. Appareil de cuisson selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le vidage des volumes d'espace intérieur (46) des réservoirs intermédiaires d'eau (45a, 45b) est réalisé par un piston (48) repoussant périodiquement l'eau dans un cylindre de levage.
  8. Appareil de cuisson selon la revendication 7,
    caractérisé en ce que
    le piston (48) du cylindre de levage est équipé d'un ressort (49) afin de pousser l'eau lors de l'ouverture du cylindre du côté espace de cuisson dans l'espace de cuisson (11).
  9. Appareil de cuisson selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le débit volumique peut être modifié pour la génération de vapeur par le dispositif de commande et de régulation (50) au moyen d'une modification temporelle de la cadence de travail du mécanisme de vidage des volumes d'espace intérieur (46a, 46b).
  10. Appareil de cuisson selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les réservoirs intermédiaires d'eau (45a, 45b) sont reliés par le biais d'une conduite d'amenée d'eau (32) de type tuyau à l'espace de cuisson (11) et une pose de tuyaux prédéterminée convertit le débit volumique fluctuant périodiquement en un débit volumique continu.
  11. Appareil de cuisson selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    un capteur (34) est prévu, lequel surveille le processus de vidage, en particulier le déplacement du piston (48).
  12. Appareil de cuisson selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le ou les réservoirs intermédiaires d'eau (45, 45a, 45b) peuvent être bloqués au moyen de plusieurs soupapes à deux/deux voies (47a, 47b, 47c, 47d) en alternance par rapport au remplissage et par rapport au vidage.
EP04819214A 2003-11-26 2004-11-24 Appareil de cuisson a systeme d'alimentation en eau Active EP1687570B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10355778 2003-11-26
PCT/EP2004/013329 WO2005052452A1 (fr) 2003-11-26 2004-11-24 Appareil de cuisson a systeme d'alimentation en eau

Publications (2)

Publication Number Publication Date
EP1687570A1 EP1687570A1 (fr) 2006-08-09
EP1687570B1 true EP1687570B1 (fr) 2009-07-22

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Family Applications (1)

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EP04819214A Active EP1687570B1 (fr) 2003-11-26 2004-11-24 Appareil de cuisson a systeme d'alimentation en eau

Country Status (5)

Country Link
US (1) US7728261B2 (fr)
EP (1) EP1687570B1 (fr)
AT (1) ATE437340T1 (fr)
DE (1) DE502004009796D1 (fr)
WO (1) WO2005052452A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2860458A1 (fr) 2013-10-14 2015-04-15 MKN Maschinenfabrik Kurt Neubauer GmbH & Co. KG Procédé de fonctionnement d'un appareil de cuisson sous la forme d'un étuveur combiné et appareil de cuisson destiné à la réalisation du procédé
DE102018124764B4 (de) 2018-10-08 2022-06-30 Miwe Michael Wenz Gmbh Verfahren zur Dampferzeugung

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMO20060333A1 (it) * 2006-10-17 2008-04-18 Gilberto Cattaneo Applicazione di dispositivi di convogliamento d'aria, all'interno di forni statici a convenzione con ventilazione orizzontale sia ad uso professionale che domestici, atti a convogliare l'aria nel mezzo del forno.
EP2240727B1 (fr) 2008-01-28 2014-12-10 Duke Manufacturing Company Four à convection
CN102226540B (zh) * 2011-05-30 2012-11-07 汪传海 零能耗中餐厨房设备
WO2013190367A2 (fr) * 2012-06-21 2013-12-27 Convotherm Elektrogeräte GmbH Moyen d'échange de chaleur pour dispositifs de cuisson et procédés d'amélioration de dispositifs de cuisson
DE102016215650A1 (de) * 2016-08-19 2018-02-22 BSH Hausgeräte GmbH Haushaltsgargerät
CN107960837B (zh) * 2016-10-20 2024-02-27 佛山市顺德区美的电热电器制造有限公司 烹饪器具
CN107960836A (zh) * 2016-10-20 2018-04-27 佛山市顺德区美的电热电器制造有限公司 烹饪器具
CN114246461B (zh) * 2020-09-21 2023-06-27 佛山市顺德区美的电热电器制造有限公司 烹饪装置的控制方法、烹饪装置、电子设备及存储介质

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DE8604451U1 (de) 1986-02-19 1986-04-30 Eloma GmbH Bedarfsartikel zur Gemeinschaftsverpflegung, 8031 Gernlinden Gerät zum Garen von Nahrungsmitteln
DE3909283C2 (de) 1989-03-21 1994-09-29 Eloma Gmbh Dampfgargerät
DE19732240C1 (de) * 1996-07-04 1999-04-08 Britax Sell Gmbh & Co Ohg Konvektionsofen, insbesondere zum Einsatz in Flugzeugbordküchen
DE19918330A1 (de) * 1999-04-22 2000-10-26 Bsh Bosch Siemens Hausgeraete Frischwasser-Dosiereinrichtung für Dampfbacköfen
DE10158425C1 (de) 2001-11-29 2003-09-11 Neubauer Kurt Maschf Gargerät mit Gebläse und Wasserzufuhr
DE20200618U1 (de) 2002-01-15 2002-07-04 Neubauer Kurt Maschf Gargerät mit Wasserzufuhr
JP3708107B2 (ja) * 2004-03-18 2005-10-19 シャープ株式会社 蒸気発生装置及びこれを搭載した蒸気調理器
ITMI20040319U1 (it) * 2004-06-30 2004-09-30 Whirlpool Co Dispositivo generatore di vapore ad uso di cottura cibi in un forno
ITMO20060306A1 (it) * 2006-09-28 2008-03-29 Angelo Po Grandi Cucine Spa Dispositivo nebulizzatore per forni

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2860458A1 (fr) 2013-10-14 2015-04-15 MKN Maschinenfabrik Kurt Neubauer GmbH & Co. KG Procédé de fonctionnement d'un appareil de cuisson sous la forme d'un étuveur combiné et appareil de cuisson destiné à la réalisation du procédé
DE102018124764B4 (de) 2018-10-08 2022-06-30 Miwe Michael Wenz Gmbh Verfahren zur Dampferzeugung

Also Published As

Publication number Publication date
ATE437340T1 (de) 2009-08-15
US7728261B2 (en) 2010-06-01
US20070084454A1 (en) 2007-04-19
EP1687570A1 (fr) 2006-08-09
DE502004009796D1 (de) 2009-09-03
WO2005052452A1 (fr) 2005-06-09

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