EP4290139A1 - Appareil de cuisson - Google Patents

Appareil de cuisson Download PDF

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Publication number
EP4290139A1
EP4290139A1 EP22178190.9A EP22178190A EP4290139A1 EP 4290139 A1 EP4290139 A1 EP 4290139A1 EP 22178190 A EP22178190 A EP 22178190A EP 4290139 A1 EP4290139 A1 EP 4290139A1
Authority
EP
European Patent Office
Prior art keywords
fastening means
fastening
household appliance
assembly
appliance
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
EP22178190.9A
Other languages
German (de)
English (en)
Inventor
Stefan Bayerlein
Björn Leyh
Holger Wundling
Eduardo PUOTI
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
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 Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP22178190.9A priority Critical patent/EP4290139A1/fr
Priority to PCT/EP2023/063853 priority patent/WO2023237335A1/fr
Publication of EP4290139A1 publication Critical patent/EP4290139A1/fr
Pending legal-status Critical Current

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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
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/108—Mounting of hot plate on worktop
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • 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
    • F24C15/08—Foundations or supports plates; Legs or pillars; Casings; Wheels

Definitions

  • the present invention relates to a household appliance comprising a fastening system for an attachment of a component or an assembly to a casing wall or to a frame or support part according to the preamble of claim 1.
  • cooking hobs comprise cooking zones for placement of cookware receiving the food to be cooked.
  • the cooking zones are generally arranged on a cooktop, in particular a glass ceramic cooktop, which forms an upper wall of the cooking hob.
  • a cooking fumes extraction functionality is integrated.
  • such kind of a combination appliance comprises a cooking hob and an integrated downdraft extraction device with an extraction opening in the cooktop of the cooking hob.
  • each type of household appliance but particularly such a combination appliance, requires a plurality of mechanical fastening solutions, which are exposed to different mechanical stress situations during the lifetime of the household appliance, especially during its transportation and/or installation, where vibrations or shocks usually occur.
  • the object is achieved for a household appliance comprising a fastening system for an attachment of a component or an assembly to a casing wall or to a frame or support part by the characterizing features of claim 1.
  • a household appliance comprises a fastening system for an attachment of a component or an assembly at a casing wall or at a frame or support part.
  • the fastening system includes at least a first fastening means and a second fastening means.
  • the first fastening means is configured to be plastically deformed under the influence of a first force exceeding a first force threshold and the second fastening means is configured to be plastically deformed under the influence of a second force exceeding a second force threshold.
  • the first and second forces are directed orthogonally to the mounting plane.
  • the first force threshold is lower than the second force threshold.
  • the household appliance is particularly a cooking appliance, more particularly a cooking hob or a combination appliance comprising a cooking hob.
  • said mounting plane is particularly the area of attachment of the component or assembly at the casing wall or frame or support part, e. g. the area of the component or assembly abutting against or touching the casing wall or frame or support part.
  • first and second fastening means With such dimensioning of first and second fastening means, it may be provided that a plastic deformation of the first fastening means occurs at a force level, specifically arising from a particular shock impulse, which force level will at most cause an elastic deformation or displacement of the second fastening means.
  • the second force threshold is preferably higher than a predetermined force value, the fastening system is required to withstand throughout the entire lifetime of the household appliance. This entire lifetime particularly includes the transportation and/or installation of the household appliance, during which it usually receives the major mechanical impact, e. g. stress situations like vibrations and/or shocks.
  • the first force threshold may be lower than said predetermined value, which may cause the first fastening means to undergo a plastic deformation in case of occurrence of a force, e. g. sourcing from a shock impulse, with a force level that may appear, during the lifetime of the appliance, specifically during transportation or installation.
  • the first fastening means is configured to absorb a shock by an elastic deformation, if this shock includes a force within a first force value range, and by a plastic deformation, if this shock includes a force within a second force value range.
  • the second force value range is specifically above the first force value range, i. e. a lower limit value of the second force value range is higher than the upper limit value of the first force value range. More specifically, the lower limit value of the second force value range abuts the upper limit value of the first force value range.
  • the fastening system may include a shock absorption capacity within the second force value range, which is increased in comparison with the first force value range.
  • Said increased shock absorption capacity is preferably induced by absorption of mechanical deformation energy associated with plastic deformation.
  • the first fastening means and the second fastening means are located in close proximity to each other. With such positioning, the first and second fastening means may closer cooperate with each other, specifically in dependence of the force that is applied. However, a more distant positioning may work as well, what may also depend on the exact location of the respective fastening means, e. g. a positioning close to a centre of gravity of the entire system.
  • the fastening system comprises a plurality of first fastening means and a plurality of second fastening means.
  • one of each of the plurality of first fastening means and one of each of the plurality of second fastening means form a pair of first and second fastening means, so as to have provided a plurality of pairs of first and second fastening means.
  • each pair includes one first and one second fastening means, which are located close to each other.
  • the first fastening means comprises at least one fastening flap, preferably a plurality of fastening flaps.
  • the second fastening means comprises at least one fastening hook, preferably a plurality of fastening hooks.
  • a main direction of extent of the fastening flap is oriented parallel to the mounting plane, the fastening flap preferably being formed as a flat element.
  • a main direction of extent of the fastening hook may be oriented orthogonally to the mounting plane.
  • the fastening hook is preferably formed as a flat element.
  • the fastening hook is configured to be inserted in an opening of the casing wall or of the frame or support part.
  • the opening is preferably a slit-shaped opening.
  • a hook end portion of the fastening hook is configured to engage behind the casing wall or the frame or support part.
  • the engagement is provided after the fastening hook, more specifically the component or assembly, has performed a sliding movement in a direction parallel to the mounting plane.
  • the hook end portion is arranged at a rear surface of the casing wall or of the frame part at least directly after fastening the component or the assembly at the casing wall or the frame part. Said rear surface faces away from the component or assembly. Further, a gap is formed between the hook end portion and the rear surface and is configured to allow at least a movement of the component or assembly relative to the mounting plane, i. e. relative to the casing wall or to the frame or support part, within the force value range, in which elastic deformation of the first fastening means takes place, or, as preferred, to allow even a movement of the component or assembly relative to the mounting plane within the force value range, in which plastic deformation of the first fastening means takes place.
  • the gap between the hook end portion and the rear surface of the casing wall or of the frame part may define a maximum level of plastic deformation of the first fastening means and/or a maximum relative movement between the component or assembly and the casing wall or the frame or support part.
  • first fastening means and/or the second fastening means is/are integrally formed with a housing or a supporting structure of the component or the assembly. That way, no additional component or part is needed, supporting the task of providing a cost-efficient solution.
  • At least one of the first fastening means and the second fastening means is a metal part, which is preferably produced by a sheet metal punching and forming process.
  • material notably any material usually used in the manufacturing of household appliances, may find use as well. More specifically, such material is selectable from a group of plastic, fibre or any similar materials.
  • material of low brittleness, or even flexible plastic or fibre material it is preferred to use material of low brittleness, or even flexible plastic or fibre material, even though it may not be excluded that a specific shock absorption will be performed by causing fine cracks on the first fastening means.
  • first and second fastening means are applied, for example using more flexible material for the first fastening means than for the second fastening means. Even more, due to the fact that the household appliance shall be constructed in that way that mechanical stress situation usually occurring during the lifetime of the appliance do not effect any plastic deformation or damage of the second fastening means, it may be possible to use material of high brittleness for this element.
  • the household appliance is a combination appliance comprising a cooking hob and the component or assembly is an extraction device or a component or assembly of the extraction device, preferably an extraction fan.
  • the component or assembly is particularly attached to a bottom wall of the cooking hob.
  • FIG. 1 illustrates a general setup of a standard combination appliance 10 comprising a cooking hob 12 and a downdraft extraction device 14 installed in a kitchen cabinet 16.
  • the cooking hob 12 is implemented in a cut-out of a kitchen countertop 18 forming a top cover plate of the kitchen cabinet 16.
  • the downdraft extraction device 14 is configured to take away cooking vapours occurring during cooking processes, in particular when cooking with uncovered cookware.
  • the cooking hob 12 comprises cooking regions 20a, 20b arranged on a left half and a right half of a cooktop 22 of the cooking hob 12, which left and right halves are separated from each other by a suction opening 24 for an intake of the cooking vapours, the suction opening 24 being arranged alongside a cooktop centreline.
  • the suction opening 24 is covered by a cover grid 26 for preventing items, e. g. cookware, to fall into the suction opening 24.
  • a lid may be used for entirely covering the suction opening when the extraction device 14 is out of use, but for the operation of the extraction device 14 the lid is pivotable into an upright open position.
  • a housing 28 of the extraction device 14 is shown in FIG. 1 in transparent illustration.
  • Said housing 28 provides a closed outer shell or channel segment for a flow of the sucked-in cooking vapours on their way from the suction opening 24 to an exhaust opening 30 in a base area 32 of the kitchen cabinet 16.
  • Said exhaust opening 30 is also covered, namely by an outlet grille 34.
  • the flow of the sucked-in cooking vapours through the extraction device 14 is driven by the operation of an extraction fan 36 arranged inside of the housing 28.
  • Said extraction fan 36 comprises a bottom-sided intake opening 38 for sucking the cooking vapours from the interior space of the housing 28.
  • a rear-sided fan outlet is arranged for a horizontal exit of the air blown out backwards from the extraction fan housing 42.
  • the fan outlet is connected to a first end of an air duct 44 designed as a rectangular tube and forms a second channel arranged downstream the above-mentioned first channel.
  • an air duct bending by 90 degrees is implemented, which redirects the air flow from horizontal to vertical downwards.
  • the air duct 44 may be guided alongside a rear side of the kitchen cabinet 16 and may be bent again by 90 degrees close to a rear lower edge of the kitchen cabinet 16 in order to direct the airflow towards exhaust opening 30 in the base area 32 of the kitchen cabinet 16. Accordingly, the second end of the air duct 44 is connected to the exhaust opening 30.
  • the embodiment illustrated in FIG. 1 shows a solution of the air duct 44 with an inclined section of its downwardly directed portion, directed slightly to the right. Naturally, a solution with said portion arranged in an exact vertical direction is considerable as well.
  • FIG. 1 The course of the cooking vapours from the cooking area through the extraction device 14 to a re-entry into ambient air is illustrated in FIG. 1 by dotted arrows 46 1 to 46 5 .
  • the cooking vapours pass through a filter assembly 48, which is arranged downstream directly behind the suction opening 24 for providing a purification of the conveyed air.
  • Said filter assembly 48 includes a filter carrier 50 supporting a filter element (not shown) that is usually configured for filtering out grease particles and droplets.
  • the structure of the combination appliance 10 with the air duct 44 inside of the kitchen cabinet 16 and the exhaust opening 30 on the front of the cabinet 16 as shown in FIG. 1 is only one installation option.
  • the illustrated air duct 44 may be replaced by a direct blow-out opening at the cabinet rear side through an opening in the rear-sided cabinet wall or by an air channel guided through a wall of the installation location of the combination appliance 10, e. g. for an air exhaust outdoors.
  • the cross-sectional view of FIG. 2 further shows two power boards 54, one for the left cooking region 20a and one for the right cooking region 20b, the power boards 54 providing cooking zones in the left and right cooking regions 20a, 20b with electrical power.
  • the cooking hob 12 is an induction cooking hob and the cooking zones are defined by induction coils (not shown) that are arranged below the cooktop 22 of the cooking hob 12. Attached to the bottom side of the power board 54 assigned to the right cooking region 20b, a further circuit board is arranged forming a control electronics 56 for the combination appliance 10.
  • a cooking hob housing 58 encloses the components of the cooking hob 12, specifically said power boards 54 and said control electronic 56. As illustrated in FIG. 3 in dotted lines, the cooking hob housing 58 is fixed to the cooktop 22 by screws via brackets 62, which themselves are attached to the bottom side of the cooktop 22 by gluing.
  • the combination appliance 10 is shown in parts in FIG. 3 with a presentation method similar to that one of FIG. 2 .
  • the presentation of FIG. 3 includes the frontal surface of the combination appliance 10.
  • the extraction device housing 28 and the filter assembly 48 are removed for an increased focus on the present inventive concept.
  • the extraction fan 36 is attached to a bottom wall 60 of the cooking hob housing 58, which attachment forms a hanging arrangement when the combination appliance 10 is installed in the kitchen cabinet 16, by means of fastening elements illustrated in FIG. 3 with dotted lines.
  • These fastening elements include hooks 66 and flaps 68, which are arranged at different lateral edges of a motor plate 64.
  • the motor plate 68 which is shown in isolated illustration in FIG. 5 , forms an integral element, more precisely a top plate, of the fan housing 42 and provides a supporting structure for the entire extraction fan 36.
  • the top surface of the assembled motor plate 64 entirely abuts against the bottom surface of the bottom wall 60 of the cooking hob housing 58.
  • FIG. 4 presenting the cooking hob housing 58 isolated from the cooking hob 12, as well as with detailed illustration according to FIG. 6 showing an enlarged view of detail VI indicated in FIG. 4 .
  • Rectangular openings 70 and slits 72 are implemented in the bottom wall 60 of cooking hob housing 58, which are configured to receive the hooks 66 and the flaps 68 that are integrally formed, more specifically received by a punching and bending process of a sheet metal, with lateral edges of the motor plate 64.
  • the flaps 68 are in a stepped arrangement to the main plane of the motor plate 64, so that the flaps 68 are configured to engage behind the bottom plate 60 of the cooking hob housing 58.
  • the hooks 66 engage behind said bottom plate 60 after their insertion in the related slits 72 and a displacement of motor plate 64 alongside the bottom surface of bottom wall 60.
  • the lower edges of the hooks 66 are spaced from said top surface by forming a gap 74 in between after fixation of the entire extraction fan 36 to the bottom wall 60. That way, in normal condition, e. g. directly after the assembly of the combination appliance 10, and without any shock impact thereon, the hooks 66 do not perform any supporting function. Instead, only after any shock impact onto the appliance 10 such supporting function comes into effect, as will be described in more detail further down below.
  • the enlarged detail view according to FIG. 6 further illustrates that an easy insertion of the flaps 68 is provided by an angled free edge 78 forming a lead-in chamfer during the assembly process.
  • the general working concept of the fastening system herein disclosed is as follows. Due to the fact that the combination appliance 10 comprises heavy components like the extraction fan 36, which are attached to other components like the cooking hob wall 60, there is a risk of damages specifically during transportation or installation of the combination appliance 10, especially in case of an unintended drop of the appliance 10 causing shocks and related displacement forces acting on the individual components. Rigid connections of these components directly transmit emerging forces caused by these shocks to the parts or components that are connected to them. In the specific case of the cooktop 22 comprising a glass ceramic plate, more specifically having a cutout forming or comprising the suction opening 24, there is a high risk for damages on the glass material because cut surfaces and edges of glass material provide weak points of the entire element.
  • the principal purpose of the specific fastening system provides a combination of one or more flat flaps 68 and one or more very strong hooks 66 with orientation orthogonally to the mounting plane, which are arranged on a connection part, specifically on the motor plate 64 of the extraction fan 36.
  • Said hooks 66 and flaps 68 may be positioned in a central area or in a side area of the connection part, or in any position therebetween.
  • the flat flaps 68 are deformed elastically within the limits of the material properties of the used material, which is preferably a metal.
  • the result may be only an elastic deformation of the flaps 68.
  • a more enhanced shock intensity inducing a higher relative movement leads to a plastic deformation of the flaps 68, which plastic deformation process includes an increased shock absorption capacity.
  • the vertically oriented hooks 66 allow said relative movement of the component and the related elastic and plastic deformation of the flat flaps 68 within the predefined distance, corresponding to the provided gap 74, only.
  • the vertical hooks 66 are sufficiently rigid for keeping the relative movement within said predefined distance. To this end, it is provided that no such shocks and related forces shall be taken into account, which would end up with any plastic deformation of the hooks 66.
  • the fastening system is preferably designed in such a way, that drop tests, as required by standards in the household business, will at most lead to plastic deformation of the flaps 68, but will not lead to any plastic deformation of the hooks 66.
  • the shocks during transport and installation may be compensated by elastic and plastic deformation of the flat flaps 68, while the vertically oriented hooks 66 ensure a proper retaining positioning of all components.
  • the included gap 74 is dependent on the maximum elastic deformation level of the material as well as the distance of the hooks 66 to the flaps 68.
  • the fixation system may include a plurality of pairs of cooperating flaps 68 and hooks 66 in a way that the motor plate 64 is entirely attached by these means to the bottom wall 60 of the cooking hob housing 58.
  • the motor plate 64 may be fastened to the bottom wall 60 of the cooking hob housing 58 on only one side, while the other side of the motor plate 64 may comprise fastening means, e. g. screws and related holes, for a rigid connection to the bottom wall 60 after said displacement of the motor plate 64 alongside the bottom surface of the bottom wall 60, so that the inventive concept will operate only one-sided, which may reduce the protective effect of the fastening system but may nevertheless be a sufficient solution.
  • the fastening system can be downsized and the number of involved parts can be reduced.
  • No flexible parts like silicone, rubber or springs are necessary as it is provided in solutions known from the prior art.
  • such flexible or soft parts might be used in addition.
  • the packaging of the entire combination appliance 10 for its safe transportation may be designed less complex and in a more cost-efficient way.
  • combination appliance 10 with specific dimensions is presented by FIGs. 1 to 6
  • the herein described setups of combination appliance 10 may be applicable to all known sizes of cooking hobs 12 and respective combination appliances 10 with a width of at least 580 mm. Two, three or four cooking zones may be provided, specifically depending on the size of the cooking hob 12.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Food-Manufacturing Devices (AREA)
  • Cookers (AREA)
EP22178190.9A 2022-06-09 2022-06-09 Appareil de cuisson Pending EP4290139A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22178190.9A EP4290139A1 (fr) 2022-06-09 2022-06-09 Appareil de cuisson
PCT/EP2023/063853 WO2023237335A1 (fr) 2022-06-09 2023-05-23 Appareil de cuisson

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22178190.9A EP4290139A1 (fr) 2022-06-09 2022-06-09 Appareil de cuisson

Publications (1)

Publication Number Publication Date
EP4290139A1 true EP4290139A1 (fr) 2023-12-13

Family

ID=82016532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22178190.9A Pending EP4290139A1 (fr) 2022-06-09 2022-06-09 Appareil de cuisson

Country Status (2)

Country Link
EP (1) EP4290139A1 (fr)
WO (1) WO2023237335A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070043A2 (fr) * 1979-08-17 1983-01-19 E.G.O. Elektro-Geräte Blanc u. Fischer Plaque de cuisson électrique
EP0278998A1 (fr) * 1987-02-17 1988-08-24 Enami Seiki Mfg. Co., Ltd. Assemblage pour feuilles métalliques
US4945891A (en) * 1989-03-30 1990-08-07 General Electric Company Drive mechanism for retractable down draft vent
WO2010022490A2 (fr) * 2008-09-01 2010-03-04 Electrolux Do Brasil Sa Composants de cuisinière
US20140352151A1 (en) * 2013-05-29 2014-12-04 Whirlpool Corporation System and method for mounting undercabinet ventilation hood
US9155445B2 (en) * 2011-02-16 2015-10-13 Bsh Hausgeraete Gmbh Integrateable domestic appliance
EP3288338A1 (fr) * 2016-08-26 2018-02-28 LG Electronics Inc. Un évent et une plaque de cuisson avec un évent
EP3324127A1 (fr) * 2016-07-12 2018-05-23 Electrolux Appliances Aktiebolag Appareil ménager comprenant un boîtier
CN216281561U (zh) * 2021-10-20 2022-04-12 佛山市顺德区普发特电器实业有限公司 一种电炉外壳

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070043A2 (fr) * 1979-08-17 1983-01-19 E.G.O. Elektro-Geräte Blanc u. Fischer Plaque de cuisson électrique
EP0278998A1 (fr) * 1987-02-17 1988-08-24 Enami Seiki Mfg. Co., Ltd. Assemblage pour feuilles métalliques
US4945891A (en) * 1989-03-30 1990-08-07 General Electric Company Drive mechanism for retractable down draft vent
WO2010022490A2 (fr) * 2008-09-01 2010-03-04 Electrolux Do Brasil Sa Composants de cuisinière
US9155445B2 (en) * 2011-02-16 2015-10-13 Bsh Hausgeraete Gmbh Integrateable domestic appliance
US20140352151A1 (en) * 2013-05-29 2014-12-04 Whirlpool Corporation System and method for mounting undercabinet ventilation hood
EP3324127A1 (fr) * 2016-07-12 2018-05-23 Electrolux Appliances Aktiebolag Appareil ménager comprenant un boîtier
EP3288338A1 (fr) * 2016-08-26 2018-02-28 LG Electronics Inc. Un évent et une plaque de cuisson avec un évent
CN216281561U (zh) * 2021-10-20 2022-04-12 佛山市顺德区普发特电器实业有限公司 一种电炉外壳

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