EP4372274A1 - Dispositif de production de vapeur et appareil ménager équipé d'un tel dispositif - Google Patents

Dispositif de production de vapeur et appareil ménager équipé d'un tel dispositif Download PDF

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Publication number
EP4372274A1
EP4372274A1 EP23205913.9A EP23205913A EP4372274A1 EP 4372274 A1 EP4372274 A1 EP 4372274A1 EP 23205913 A EP23205913 A EP 23205913A EP 4372274 A1 EP4372274 A1 EP 4372274A1
Authority
EP
European Patent Office
Prior art keywords
heating
chamber
water
steam
water storage
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.)
Pending
Application number
EP23205913.9A
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German (de)
English (en)
Inventor
Tobias Albert
Sebastian Eigl
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP4372274A1 publication Critical patent/EP4372274A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs

Definitions

  • the invention relates to a device for generating steam, preferably for household appliances such as ovens or steam cookers, but also for washing machines, for example.
  • the device has a water storage chamber and a heating chamber on which a heating device for heating and evaporating water is arranged.
  • the invention also relates to a household appliance with such a device for generating steam, in particular an oven or steam cooker, possibly also a washing machine or dishwasher.
  • Such a device for generating steam is known. It is designed as a type of circuit and has a water storage chamber on one side. This has a water inlet and a water outlet, which leads downwards as a type of pipe and then away to the side and upwards in a ring-like manner back into the water storage chamber. In the right-hand area running upwards, a water pipe is formed from a different component, and two elongated heating devices are attached to the outside here. These heat the water flowing through to such a high temperature that it can exit as steam at an upper end of the return line to the water storage chamber, which corresponds to a steam outlet. This design allows the water to circulate and thus be heated up as it flows until steam forms.
  • the invention is based on the object of creating a device mentioned at the outset with which problems of the prior art can be eliminated and in particular it is possible to evaporate water quickly and energy-efficiently to generate steam and to be able to arrange or accommodate the device in an aforementioned household appliance.
  • the device for generating steam has a water storage chamber, which in turn has a water inlet and a water outlet.
  • the water inlet is used to refill the water storage chamber with water, in particular from the outside, either through a connected line with a valve or manually through a nozzle.
  • the device also has a heating chamber in which water from the storage chamber is contained and heated to form steam.
  • the heating chamber has a heating chamber inlet that is connected to the water outlet in a fluid-conducting manner.
  • the water outlet and heating chamber inlet can be identical, for example an opening in a wall.
  • the heating chamber also has a steam outlet to which steam generated in the heating chamber can escape. A corresponding steam line can then be connected to this steam outlet, which leads to a specific place where the steam is used.
  • the device has a heating device that is arranged on the heating chamber. It is used to heat and evaporate water in the heating chamber.
  • the heating device is an electrical heating device, in particular with a resistance heating element which heats by contact heat or heats the water and causes it to evaporate.
  • the water storage chamber is arranged laterally next to the heating chamber. They therefore do not surround each other, and the heating does not surround the water. Furthermore, the device is wider in a direction of extension from the heating chamber to the water storage chamber than it is high in a vertical direction or in the vertical direction perpendicular to it. The device is also at least 5 times wider in the horizontal direction than in a horizontal thickness direction perpendicular to it. It can therefore be said that the device as a whole is advantageously flat on edge and is wider than it is high.
  • This design enables the device to be integrated easily and in a space-saving manner into an aforementioned household appliance, for example on an outside, in particular on a back, of such a household appliance or a treatment chamber that is optionally thermally insulated from the outside, such as a muffle of a steamer or oven. Due to the overall flat design of the entire device and advantageously also of the heating chamber per se, there are at least one or actually two outside sides that are relatively large and can therefore be very well covered by a flat heating device for heating.
  • the water storage chamber and the heating chamber form a structural unit with a single common housing.
  • This can be manufactured particularly advantageously by plastic injection molding, in particular in two or three parts. These individual parts can then be assembled to form the structural unit or housing.
  • the heating device can then be arranged on it.
  • manufacturing as a common structural unit handling and In particular, mounting on a household appliance is easier.
  • electrical connections can also be made more easily, so that the device or the structural unit only has a single external connection, advantageously designed as a multiple plug. This also makes final assembly with the household appliance easier, faster and error-free.
  • the aforementioned structural unit can have an external cuboid shape, i.e. be relatively simple.
  • the thickness can also be less than 20% of the width in the horizontal direction, for example down to 5%.
  • the heating device can therefore also be larger and more powerful.
  • the water storage chamber and the heating chamber are formed and separated from one another in one housing, i.e. a single common housing according to the aforementioned embodiment, by providing a housing partition.
  • the housing itself can thus have a single internal volume, so to speak, and the division is carried out by the housing partition arranged therein.
  • the aforementioned water outlet of the water storage chamber can correspond to the heating chamber inlet of the heating chamber, whereby it can be formed particularly simply by an opening and/or by an interruption in the housing partition. In this way, no complex lines, channels or the like are required, which can cause manufacturing and assembly costs and the risk of leaks. All water that leaves the water storage chamber necessarily reaches the heating chamber. It can also be provided that only a single breakthrough or a single opening or interruption in the housing partition is provided between the water storage chamber and the heating chamber.
  • the structural unit is essentially formed by the water storage chamber and the heating chamber, both of which are open in themselves or are no longer divided and which are connected to one another.
  • water can flow from the water storage chamber into the heating chamber, advantageously automatically or without any necessary effort.
  • An aforementioned heating device can then advantageously cover an entire side or outside of the heating chamber. In this way, a high heating power can be fed into the water in the heating chamber.
  • This heating device can act over at least the largest part of the cross-section of the heating chamber.
  • a separating partition wall can be arranged within the heating chamber, which divides the heating chamber once again, so to speak. It can preferably be divided into two areas, which have at least two connecting channels to one another for fluid-conducting connection. A connecting channel can thus particularly preferably be arranged in the upper area of the heating chamber, advantageously in the uppermost area.
  • the partition wall can have a corresponding opening and/or interruption, for example similar to that described above for the housing partition wall.
  • the upper connecting channel is advantageously arranged above a normal water level for water in the device or in the structural unit. This means that mainly or even exclusively steam can flow from one area to the other through the upper connecting channel, with a steam outlet leading from the other area in particular.
  • Another connecting channel can advantageously be provided in the lowest area of the heating chamber, particularly advantageously as an opening or interruption in the partition wall. The other connecting channel should always run below the water level so that a constant flow of water is ensured here.
  • the heating chamber can be divided by means of a partition wall into a heating area on which or for which the heating device is arranged.
  • the heating device can cover a side surface of the heating chamber or the heating area of the heating chamber.
  • the other area is a steam area from which the aforementioned steam outlet branches off. Steam can also flow from the heating area through this connecting channel to the steam outlet via an aforementioned upper connecting channel and in doing so pass through the upper area of the steam area.
  • no heating device is arranged in the steam area. This can, for example, ensure that there is no boiling or simmering water below the steam outlet, which could otherwise throw small water droplets out to the steam outlet.
  • the steam area mentioned can be arranged between the water storage chamber and the heating area.
  • the water storage chamber and the heating area are thus separated from one another by the steam area.
  • the steam area forms a kind of thermal insulation between the heating area and the water storage chamber. This can prevent too much heating energy from the heating system also goes into the water storage chamber, which could potentially result in energy loss.
  • the heating device is arranged on the outside of the heating chamber.
  • the heating device is advantageously designed to be flat or planar. In particular, it can cover at least 20% of the outer surface of the heating chamber or the heating area. This is advantageously at least 30% to 40%, in particular at least 30% to 40% of the outer surface of the heating area of the heating chamber.
  • the heating chamber has two flat outer sides that are opposite one another. This is certainly possible with the aforementioned preferred embodiment of the heating device with a flat design. It can advantageously be provided that the heating device is only arranged on one of the aforementioned flat outer sides. The other flat outer side is then designed without a heating device or has no heating. This is advantageously the outer side that faces functional units of the household appliance, such as an oven muffle or a treatment room.
  • One possibility for arranging the heating device on the housing or on the structural unit in the area of the heating chamber can be that an aforementioned outer side has an opening or hole. This opening can be between 5% and 50% of the outer side of the heating device.
  • the heating device then covers this hole, the main advantage being that the heating device then comes into direct contact with water in the heating area or on the heating chamber. This ensures that the water is heated quickly and efficiently. In this way, heat transfer between the heating device and the water in the heating chamber can be kept very low over at least a significant or predominant area of the heating device, in particular more than 60% of its area.
  • the heating device should be large compared to the outer side in the area of the heating chamber.
  • the heating device is a thick-film heating device. This is produced by applying a thick-film heating element directly to a metal heating carrier.
  • the heating device with the heating carrier can be arranged on the outside of the heating chamber.
  • Thick-film heating devices or thick-film heating elements of this type are more complex to manufacture, but have a very good ratio of their own weight or mass to their heating power and heating surface. Due to the relatively lower energy requirement for their own heating, more heat can then be applied to the water over a large area.
  • the heating device is a thick-film heating device, in which a thick-film heating element is advantageously applied directly to a mechanical heating carrier.
  • the heating device can then be arranged with the heating carrier on an outside of the heating chamber, for example as previously mentioned.
  • the water inlet and/or the steam outlet protrude upwards. It can be provided that the water inlet and also the steam outlet protrude upwards. This can correspond to a housing as already described.
  • the water inlet and/or steam outlet protrude upwards, especially because this makes it easier for steam to rise upwards.
  • the aspect of the water inlet protruding upwards is considered less important, as this is simply a good place for such a water inlet without having to worry about water running out of it again.
  • the steam outlet at the top has the advantage that steam can escape upwards and into a device without being disturbed.
  • a drain outlet it is possible for a drain outlet to lead from the water storage chamber. In this case, it should lead from a lower area or a lowest point of the water storage chamber, similar to how the steam outlet should lead from an uppermost area of the water storage chamber and/or the heating chamber. In this way, the water can be drained as completely as possible.
  • This drain outlet should not be confused with the water outlet provided according to the invention, which was described above and which connects the water storage chamber and the heating chamber to one another in a water-conducting manner. However, such a drain outlet is not mandatory; any remaining water could also be evaporated by operating the heating device.
  • the water storage chamber and heating chamber can also be dried in this way.
  • a household appliance according to the invention has a treatment chamber arranged in a housing of the appliance and the aforementioned device for generating steam.
  • the appliance and the device for generating steam can be controlled via a single control system, and a display or a UI can also advantageously be available for this purpose.
  • the device for generating steam is advantageously arranged on the back of the household appliance, with its flat design aligned in such a way that the depth of the appliance increases as little as possible.
  • a steam oven 11 according to the invention is shown as a household appliance in a very simplified rear view, as is known per se from the prior art. It has a housing 12, inside of which an oven muffle (not shown here but known from the prior art) is arranged as the treatment chamber mentioned at the beginning.
  • a steam generator 15 according to the invention is arranged on a rear side 13 of the steam oven 11. It has two hoses known per se, one for the water supply and the other for the steam removal. This is explained in more detail below.
  • the steam generator 15 is arranged on the outside of the housing 12 so that it is insulated from the oven muffle, for example by thermal insulation in the housing 12. Furthermore, assembly and repair or maintenance are easier.
  • the steam generator 15 according to the invention is shown enlarged in a first embodiment and in front view. It has, as can also be seen from the side view of the Fig.3
  • a housing 16 of the steam generator 15 consists of a single part, whereby it is advantageously two-part or two-shelled. and then assembled accordingly.
  • the width of the housing 16 is approximately 25% greater than the height.
  • the thickness according to Fig.3 is just under 15% of the width. This means that the housing 16 is relatively flat in the portrait orientation.
  • a water storage chamber 18 is provided on the left in the housing 16.
  • a water inlet 20 arranged at the top, water W can be let into the water storage chamber 18 through an aforementioned hose, advantageously by means of a pump and/or dosing device.
  • This water W is then present in the water storage chamber 18 at a certain level P.
  • This can optionally be measured by sensors such as those known from the prior art, for example according to EP1870641A2 known, monitored and maintained at a certain level.
  • An optional drain outlet 22 is provided at the bottom of the water storage chamber 18. Water that is left over and no longer needed can be drained here in order to avoid hygiene problems. Cleaning liquid, for example for descaling, which should not be evaporated can also be drained here.
  • a water outlet 21 from the water storage chamber 18 is formed in that a vertical partition wall 25 does not lead to a bottom of the water storage chamber 18 or the housing 16, but ends, for example, 2 cm to 5 cm above it.
  • a heating chamber 28 for the water W is formed, in which the same level P for water W is established.
  • the water outlet 21 thus forms the heating chamber inlet 30 as a simple opening at the same time.
  • a steam outlet 31 leads off from the top of the heating chamber 28 to the hose described above.
  • a drain outlet or the like from the heating chamber 28 is not necessary; the drain outlet 22 of the water storage chamber 18 serves this purpose.
  • a base of the housing 16 can also be designed at an angle towards the drain outlet 22 so that as much water as possible can drain off easily.
  • An opening 34 is provided on the flat side 33 of the housing 16, shown in dashed lines.
  • This opening 34 is closed by a flat heating device 35, which is advantageously designed as the thick-film heating device described above.
  • a flat heating device 35 can have a metallic heating carrier in a known manner, to which a thick-film heating element is applied.
  • a seal for example made of silicone, can be provided between the flat side 33 of the housing and the heating device 35 in order to securely seal the opening 34. This makes it possible to remove the heating device 35 and replace it if necessary.
  • the heating device 35 can be glued to the flat side 33 of the housing, thus also sealing the opening 34. close or seal. Electrical connections or the like for the heating device 35 are not shown.
  • a cover or the like should also be placed over it, for example made of plastic, in order to protect the heating device 35 against damage and to electrically isolate it or isolate it.
  • the partition wall 25 can be arranged as a separate part in the housing 16, for example glued on, in order to divide it into the water storage chamber 18 on the one hand and the heating chamber 28 on the other.
  • the housing 16 is made from two half-shells that are joined together, it can be formed either completely or partially or half-on one of these half-shells. The finished partition wall 25 is then formed by joining them together.
  • the heating device 35 only reaches just above the intended level P.
  • the water W can reach the heating device 35 directly through the opening 34 and can thus be heated as directly and effectively as possible.
  • the heating device 35 covers approximately 60% to 70% of the outside of the flat side 33 of the housing on the heating chamber 28.
  • another heating device for the heating chamber 28 could also be provided on the opposite flat side of the housing.
  • further thermal and/or electrical insulation of the steam generator 15 from the rear side 13 of the housing 12 of the steam oven 11 would then have to be provided.
  • the interior of the heating chamber 28 above the level P can also be heated by the top 15% to 20% of the heating device 35, and thus the steam present here can be heated even more.
  • steel wool or the like can be provided in the heating chamber 28 in order to reduce calcification and to reduce bubble formation or boiling turbulence.
  • sensors for detecting the height of the level P and for setting it can be provided, in particular as temperature sensors for controlling the heating device 35 or the amount of steam generated. These are known per se from the prior art and can be arranged at an advantageous location on the steam generator 15 or its housing 16.
  • a second embodiment of a steam generator 115 according to the invention is shown, which can be connected in the same way to the steam oven 11 according to Fig.1
  • the steam generator 115 also has a housing 116 with identical external dimensions as before.
  • a water storage chamber 118 provided on the left has a water inlet 120 at the top and a drainage outlet 122 at the bottom left.
  • the water storage chamber 118 is delimited to the right by a partition 125.
  • a water outlet 121 is provided at the bottom right of the partition 125.
  • a steam chamber 137 is provided to the right of the partition 125, into which water flows through the water outlet 121.
  • the steam chamber 137 is separated from the heating chamber 128 to the right by an intermediate wall 138.
  • a lower passage 139 is formed at the lower end of the intermediate wall 138 and an upper passage at the upper end of the intermediate wall 138. Water W flows through the lower passage 139. Steam will flow through the upper passage 140, from the heating chamber 128 to the steam outlet 131.
  • the design of the intermediate wall 138 can be similar to that described above for the partition 125.
  • the advantage of the intermediate wall 138 here is that the intermediate wall 138, which extends far up and has a relatively small upper passage 140, means that no splashing water droplets or the like occur. with escaping steam to the steam outlet 131. These would be very disruptive inside the steam oven 11.
  • the partition wall 138 can serve as a type of droplet separator.
  • the heating device 135 is narrower here than that of the Fig.2 , in particular about 30% narrower. This can be compensated by a higher power density. Although there is water in the steam chamber 137, it is not heated directly.
  • the steam outlet 131 is provided directly on its top.
  • the partition wall 125 and the intermediate wall 138 are continuous from the front flat side 133 of the housing to the rear. Furthermore, the block-like or cuboid-like outer shape of the housing 116 can also be clearly seen from this.
  • the arrangement of the flat water storage chamber next to the steam chamber and heating chamber, which are also flat, can also be seen from this, which also applies to the first design of the steam generator 15, with the exception of the steam chamber. It is therefore relatively flat and can be arranged on a household appliance to save space. Due to the relatively large surface area, a large heating device can be attached, which evaporates water quickly and efficiently.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
EP23205913.9A 2022-11-15 2023-10-25 Dispositif de production de vapeur et appareil ménager équipé d'un tel dispositif Pending EP4372274A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022212145.7A DE102022212145A1 (de) 2022-11-15 2022-11-15 Vorrichtung zur Dampferzeugung und Haushaltsgerät mit einer solchen Vorrichtung

Publications (1)

Publication Number Publication Date
EP4372274A1 true EP4372274A1 (fr) 2024-05-22

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Family Applications (1)

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EP23205913.9A Pending EP4372274A1 (fr) 2022-11-15 2023-10-25 Dispositif de production de vapeur et appareil ménager équipé d'un tel dispositif

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EP (1) EP4372274A1 (fr)
DE (1) DE102022212145A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374863B1 (fr) * 1988-12-21 1994-09-28 MERLONI ELETTRODOMESTICI S.p.A. Générateur de vapeur pour four de cuisson en particulier de ménage
EP1870641A2 (fr) 2006-06-20 2007-12-26 E.G.O. ELEKTRO-GERÄTEBAU GmbH Dispositif d'évaporation, dispositif d'évaluation tout comme procédé de fonctionnement d'un dispositif d'évaporation
DE102007048567A1 (de) 2007-10-09 2009-04-16 Miele & Cie. Kg Verfahren zur Reinigung eines Systems, bestehend aus einem Tank und einem Durchlauferhitzer, sowie System
EP2309910B1 (fr) * 2008-07-21 2016-06-01 LG Electronics Inc. Buse pour nettoyeur
US20220186924A1 (en) * 2019-04-02 2022-06-16 Otter Controls Limited Steam Generator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013205748A1 (de) 2013-04-02 2014-10-02 BSH Bosch und Siemens Hausgeräte GmbH Dampferzeugungssystem für Haushalts-Gargerät
EP3225139B1 (fr) 2016-03-30 2020-04-29 E.G.O. ELEKTRO-GERÄTEBAU GmbH Dispositif d'evaporation pour l'eau
DE102016214283A1 (de) 2016-08-02 2018-02-08 E.G.O. Elektro-Gerätebau GmbH Verdampfereinrichtung für Wasser und Gargerät mit einer solchen Verdampfeinrichtung
DE102019111796A1 (de) 2019-05-07 2020-11-12 Rational Aktiengesellschaft Baugruppe mit einem Dampfgenerator und einem Wasseranschlussbehälter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374863B1 (fr) * 1988-12-21 1994-09-28 MERLONI ELETTRODOMESTICI S.p.A. Générateur de vapeur pour four de cuisson en particulier de ménage
EP1870641A2 (fr) 2006-06-20 2007-12-26 E.G.O. ELEKTRO-GERÄTEBAU GmbH Dispositif d'évaporation, dispositif d'évaluation tout comme procédé de fonctionnement d'un dispositif d'évaporation
DE102007048567A1 (de) 2007-10-09 2009-04-16 Miele & Cie. Kg Verfahren zur Reinigung eines Systems, bestehend aus einem Tank und einem Durchlauferhitzer, sowie System
EP2309910B1 (fr) * 2008-07-21 2016-06-01 LG Electronics Inc. Buse pour nettoyeur
US20220186924A1 (en) * 2019-04-02 2022-06-16 Otter Controls Limited Steam Generator

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