WO2015155637A1 - Procédé d'assemblage d'un moufle à la structure d'un four et four comprenant un moufle assemblé selon le procédé - Google Patents

Procédé d'assemblage d'un moufle à la structure d'un four et four comprenant un moufle assemblé selon le procédé Download PDF

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Publication number
WO2015155637A1
WO2015155637A1 PCT/IB2015/052398 IB2015052398W WO2015155637A1 WO 2015155637 A1 WO2015155637 A1 WO 2015155637A1 IB 2015052398 W IB2015052398 W IB 2015052398W WO 2015155637 A1 WO2015155637 A1 WO 2015155637A1
Authority
WO
WIPO (PCT)
Prior art keywords
muffle
flange
fixing bracket
oven
bearing structure
Prior art date
Application number
PCT/IB2015/052398
Other languages
English (en)
Inventor
Fabio Gambardella
Matteo Scoponi
Original Assignee
Indesit Company S.P.A.
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 Indesit Company S.P.A. filed Critical Indesit Company S.P.A.
Priority to EP15720453.8A priority Critical patent/EP3129714B1/fr
Publication of WO2015155637A1 publication Critical patent/WO2015155637A1/fr

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
    • F24C15/08—Foundations or supports plates; Legs or pillars; Casings; Wheels

Definitions

  • the present invention relates to a process of assembling a muffle inside an external bearing structure of a domestic cooking oven.
  • the present invention further relates to a domestic cooking oven whose muffle is assembled and fastened to the external bearing structure according to the aforementioned assembly process.
  • Ovens are known in which the muffle is fastened to the external frame through a plurality of screws.
  • a connecting element interposed between the muffle and the frame there is a connecting element, which is screwed both to the muffle and to the frame.
  • a further drawback is due to the fact that the fastening of a plurality of screws to the muffle can compromise subsequent surface finishing processes on the internal surfaces of the muffle, such as, for example, painting or lacquering.
  • a principal object of the present invention is to resolve one or more of the problems found in the prior art.
  • An object of the present invention is to provide a domestic cooking oven equipped with a stable fastening between the muffle and the external bearing structure of the oven.
  • a further object of the present invention is to provide process of assembling a muffle inside a bearing structure of a domestic cooking oven that is simple, quick, rational and cheap to perform.
  • a domestic cooking oven comprising:
  • a muffle (3) housed inside the external bearing structure (2) and comprising a lateral wall (31 ) and a first and a second covering element (32, 33) engaged with the lateral wall (31 ) respectively at an upper and a lower end portion (318, 319) of the lateral wall (31 ) such as to define a cooking chamber;
  • the lateral wall (31 ) of the muffle (3) comprises a first and a second side (31 1 , 312) parallel to each other and a transversal wall (313) interposed between, and extending orthogonally to, the first and second sides (31 , 312),
  • the muffle (3) comprises at least one flange (10) extending transversally to the lateral wall (31 ) and at least partially at the first and second sides (31 1 , 312) and/or at the transversal wall (313), the oven (1 ) further comprising at least one fixing bracket (20) configured for constraining the muffle (3) to the bearing structure (2), said at least one fixing bracket (20) being welded to said at least one flange (10) and being engaged with the external bearing structure (2).
  • the lateral wall (31 ) is constituted by a single part and/or the covering elements (32, 33) of the muffle (3) are non-removably engaged with the lateral wall (31 ), particularly through welding.
  • the external bearing structure (2) comprises at least a first and a second panel (21 , 22) engaged respectively with the first and second side (31 1 , 312) of the muffle (3) and equipped with one or more constraining portions (25), said at least one fixing bracket (20) being engaged with the first and the second panel (21 , 22) at the respective constraining portions (25) through one or more screws or through bolting or similar fastening means.
  • said at least one fixing bracket (20) has at opposite end portions of the bracket (20) one or more coupling portions (210) configured to be engaged with means for moving the muffle (3), such as means for lifting the muffle (3).
  • a 5th aspect envisages a process of assembling a muffle (3) inside a bearing structure (2) of a domestic cooking oven (1 ) in accordance with any one of the preceding aspects, the process comprising the steps of:
  • a lateral wall (31 ) comprising a first and a second side (31 1 , 312) parallel to each other and a transversal wall (313) interposed between, and extending orthogonally to, the first and second sides (31 1 , 312),
  • the muffle (3) comprising at least one flange (10) extending at least in proximity of connecting angular portions between the transversal wall (313) and the first and second sides (31 1 , 312) said at least one flange (10) comprising a substantially flat guide surface (105) extending away from, in particular orthogonally to, the lateral wall (31 ) of the muffle (3),
  • said at least one flange (10) is defined at at least one of the first and the second covering elements (32, 33).
  • the process comprises the step of engaging the first and the second covering element (32, 33) with the muffle (3) respectively at an upper and a lower end portion (318, 319) of the lateral wall (31 ) so as to define a cooking chamber, said engagement defining said at least one flange (10).
  • the muffle (3) defines a cooking chamber delimited perimetrally by the first and by the second side (31 1 , 312) and by the first and the second covering element (32, 33), the process comprising the step of fastening a facade (5) to the muffle (3) perimetrally with respect to said cooking chamber of the muffle (3).
  • the fastening of the facade (5) to the muffle (3) is performed before the engagement of the first and the second panel (21 , 22) to the muffle (3).
  • the process comprises a step of engaging the first and the second panel (21 , 22) with the facade (5).
  • the process comprises the engagement of a rear panel (23) with the first and the second panel (21 , 22) so as to close the external bearing structure (2) from the rear.
  • figure 1 represents a side view of a domestic cooking oven according to the present invention
  • figure 2 represents an axonometric view of the muffle of the oven of figure
  • figure 3 shows a detail of figure 2
  • figure 4 represents a rear view of the muffle of the oven of figure 1 ;
  • figure 5 represents a view from above of the muffle engaged with the external bearing structure of the oven in accordance with the present invention, with some elements removed;
  • figure 6 represents the section VI-VI of figure 5 with some elements removed;
  • figure 7 shows a detail of figure 6
  • figure 8 represents an exploded view of the oven according to the present invention.
  • figure 9 represents an exploded view from above of the oven according to the present invention.
  • the oven 1 indicates overall a domestic cooking oven.
  • the oven 1 comprises an external bearing structure 2, a muffle 3 housed inside the external bearing structure 2 and defining a cooking chamber and a door 4 that allows access to the cooking chamber.
  • the oven 1 further comprises a facade 5 associated with the bearing structure 2 at a front portion of the oven 1 perimetrally with respect to an access mouth to the cooking chamber.
  • the facade 5 may have two side uprights 51 and an upper and lower portion 52, 53 arranged transversally to the two side uprights 51.
  • the external bearing structure 2 is adapted to structurally support the muffle 3 and comprises a first and a second panel 21 , 22 and a rear panel 23.
  • the first and the second panel 21 , 22 are positioned laterally with respect to the muffle 3 and are reciprocally parallel, while the rear panel 23 is positioned at a rear portion of the oven 1 (opposite the access mouth to the cooking chamber) and is interposed between them in the orthogonal direction.
  • the first and the second panel 21 , 22 are engaged with the muffle 3, for example through one or more set screws or through bolting or similar fastening means.
  • first and the second panel 21 , 22 may have one or more constraining portions 25 at which they may be engaged to the muffle 3 through at least one of the aforementioned fastening means, as illustrated in figure 2 with reference to the first panel 21.
  • the muffle 3 comprises a lateral wall 31 and a first and a second covering element 32, 33, which are engaged to the lateral wall 31 at an upper and lower end portion 318, 319 of the lateral wall 31 .
  • the engagement of the first and the second covering element 32, 33 to the lateral wall 31 may be made for example through welding, in particular through continuous welding.
  • continuous welding means welding defining a welding seam substantially extending without interruption.
  • Continuous welding is opposed to "discrete" welding, a term which in the context of the present description means welding that has a plurality of discrete welding spots. Examples of "discrete" welding are spot welding and tack welding.
  • the lateral wall 31 in turn comprises a first and a second side 311 , 312 reciprocally parallel and a transversal wall 313, which is interposed between the first and the second side 31 1 , 312 and extends orthogonally to them.
  • the lateral wall 31 of the muffle 3 has a substantially C-shaped profile (see figure 8) defined by the transversal orientation of the first and the second side 311 , 312 with respect to the transversal wall 313.
  • the first and the second side 31 1 , 312 of the muffle 3 may have one or more engagement portions 71 at which they may be constrained to the facade 5 at respective engagement portions 72 of the side uprights 51 of the facade 5, for example, through one or more set screws or through bolting or similar fastening means.
  • figure 8 illustrates a plurality of engagement portions 71 of the first side 311 of the muffle 3 and an engagement portion 72 of one of the two uprights 51.
  • the first and the second side 31 1 , 312 are respectively engaged with the first and the second panel 21 , 22 as will be described in more detail below.
  • the first and the second side 31 1 , 312 may further be engaged with the facade 5.
  • the cooking chamber defines the internal volume of the oven 1 adapted to house the food intended to be heated or cooked and is defined laterally by the sides 31 , 312, at the rear by the transversal wall 313 and at the top and bottom, respectively, by the first and the second covering element 32, 33 of the muffle 3.
  • the door 4 is arranged in a front portion of the oven 1 and is rotatably engaged with the bearing structure 2; it may for example be hinged to the lower portion 53 of the facade 5.
  • the door 4 substantially constitutes a front wall of the oven 1 movable between at least one closed position wherein the cooking chamber is not accessible from the outside and an open condition wherein the cooking chamber is accessible from the front through the access mouth.
  • the door 4 is equipped with a handle 41 which enables the easy grip and movement between the closed and the open position.
  • the oven 1 further comprises one or more flanges 10 defined at the first and/or the second covering element 32, 33 and one or more fixing brackets 20 for fixing the muffle 3 to the bearing structure 2.
  • the fixing brackets 20 constitute the elements for constraining the muffle 3 to the bearing structure 2 and for that purpose are engaged both with the muffle 3 (at the flanges 10) and with the bearing structure 2.
  • Each flange 10 extends transversally, in particular orthogonally, with respect to the lateral wall 31 and at least partially at the first and the second side 31 1 , 312.
  • the flanges 10 extend in proximity of connecting angular portions between the transversal wall 313 and the first and second sides 31 1 , 312, as illustrated in figure 2 and in figure 3.
  • Each flange 10 arranged at connecting angular portions of the lateral wall may extend both along at least one of the first and the second side 31 1 , 312 and along the transversal wall 313; for example, each flange 10 may have a lateral portion 108 extending at the first and/or the second side 31 1 , 312 and a transversal portion 109 extending at the transversal wall 313.
  • the length of the lateral portions 108 of the flanges 10 which extend at the respective sides 31 1 , 312 of the lateral wall 31 is shorter than the length of the respective sides 31 1 , 312.
  • each flange 10 has a guide surface 105 substantially flat and that extends away from the lateral wall 31 of the muffle 3 in the orthogonal direction.
  • Such guide surface 105 abuts with a corresponding substantially flat surface of the brackets 20, which will be described in more detail below.
  • the first and the second covering element 32, 33 comprise respectively a first and a second flange 101 , 102.
  • the first and the second flange 101 , 102 may comprise two lateral portions 108 extending respectively at the first and the second side 31 1 , 312 and a transversal portion 109 that extends interposed between the two lateral portions 108, connecting them.
  • both flanges 101 , 102 may extend continuously at the first side 31 1 of the transversal wall 313 and at the second side 312 of the lateral wall 31 of the muffle 3, having a substantially C-shaped profile.
  • the fixing brackets 20 have a coupling portion 208 to a flange 10 and a transversal portion 209 to the coupling portion 208.
  • the coupling portion 208 has a substantially flat surface 205 in abutment with the guide surface 105 of the flange 10 with which the bracket 20 is engaged.
  • the coupling portion 208 has edges which, at opposite end portions of the bracket 20, may have coupling portions 210 which, in a step of the assembly process subsequent to the engagement of the brackets 20 with the respective flanges 10 of the muffle 3 and prior to the engagement of the brackets 20 with the external bearing structure 2, may be intended to be engaged with means for moving the muffle 3.
  • An example of movement means may be comprised by a device for lifting the muffle 3 adapted to raise the muffle 3 and support it in a suspended position within the enamelling or lacquering oven.
  • the coupling portions 210 may have a substantially V-shaped conformation, as shown in figure 5.
  • the brackets 20 may also have one or more holes at the coupling portion 208 and/or the transversal portion 209; such holes may be engaged by fastening means (for example set screws) for fastening the muffle 3 to the external bearing structure 2, in particular to the rear panel 23.
  • fastening means for example set screws
  • the brackets may have a higher thickness SS than a thickness SF of the respective flange to which the bracket 20 is coupled.
  • the thickness SF of each bracket 20 may be comprised between 1 and 2.5 mm, in particular it may be substantially equal to 1.5 or 2 mm, while the thickness of each flange 10 may be comprised between 0.2 and 1 mm, in particular substantially equal to 0.5 mm.
  • Such thickness SS of the brackets 20 enables structural solidity to be given to the fastening between the muffle 3 and the external bearing structure 2, to which the brackets 20 are constrained.
  • the thickness SF of the flanges 10 it has contained values such as those mentioned above, hence allowing to save on material and to make the covering elements 32, 33 lighter, consequently reducing the total weight of the muffle 3.
  • the oven 1 may comprise at least one first and a second fixing bracket 201 , 202, engaged respectively with the first and the second flange 101 , 102.
  • the oven 1 comprises a first, a second, a third and a fourth fixing bracket 201 , 202, 203, 204.
  • the first and the third bracket 201 , 203 are engaged with the first flange 101 at opposite ends of the first flange 101 in proximity of connecting angular portions of the lateral wall 31 , as shown in figure 2 and in figure 4.
  • the second and the fourth bracket 202, 204 are engaged with the second flange 102 at opposite ends of the second flange 102 in proximity of connecting angular portions of the lateral wall 31 , as shown in figure 2 and in figure 4.
  • the muffle 3 has at the top a first flange 101 with which the first and the third bracket 201 , 203 are engaged and at the bottom a second flange 102 with which the second and the fourth bracket 202, 204 are engaged.
  • the first and the third fixing brackets 201 , 203 can be engaged with the first flange
  • the second and the fourth fixing bracket 202, 204 can be engaged with the second flange 102, 101 so that its substantially flat surface 205 abuts on the guide surface 105 below the second flange 1 , as shown in figure 2.
  • first and the third fixing brackets 201 , 203 can be coupled above the first flange 101
  • second and the fourth fixing brackets 202, 204 can be coupled below the second flange 102.
  • the brackets 20 are engaged to the flanges 10 through welding.
  • the welding has a plurality of discrete welding spots 6, as shown in the detail of figure 3.
  • the welding of the brackets 20 to the respective flanges 10 is spot welding or tack welding.
  • the present invention further relates to a process of assembling a muffle 3 inside an external bearing structure 2 of a domestic cooking oven 1.
  • the muffle is assembled by engaging the first and the second covering elements 32, 33 respectively at the upper and lower end portions 318, 319 of the lateral wall 31 so as to define a cooking chamber.
  • one or more brackets 20 are engaged with the first and the second flange 101 , 102 with the substantially flat surfaces 205 of the brackets 20 in abutment on the respective guide surfaces 105 of the flanges 101 , 102.
  • the brackets 20 are welded to the flanges 10 at a plurality of discrete welding spots 6.
  • the welding may be performed so that adjacent discrete welding spots 6 are equidistant, in order to equally distribute the stress and strain acting on the bracket 20.
  • Such stress and strain is due to the static load resulting from the weight of the muffle 3 and any dynamic loads, due, for example, to the movement or transport of the oven 1.
  • Advantageously such welding can be performed automatically by an appropriate welding machine, hence not involving the manual intervention of operators.
  • first and the second panel 21 , 22 are respectively engaged with the first and the second side 31 1 , 312 by means of brackets 20.
  • first and the second panel 21 , 22 may be engaged with the muffle 3 at the respective constraining portions 25 of the panels 21 , 22 through one or more set screws.
  • the set screws cross the brackets 20 at the transversal portions 209 (for example crossing one or more holes defined therein) and are engaged with the panels 21 , 22 at the respective constraining portions 25.
  • the facade 5 is fastened to the muffle 3 perimetrally with respect to the access mouth of the cooking chamber.
  • the first and the second panel 21 , 22 of the external bearing structure 2 may be engaged with the side uprights 51 of the facade 5 at the respective engagement portions 71 , 72, for example though one or more screws or through bolting or similar fastening means.
  • the rear panel 23 is engaged with the first and the second panel 21 , 22 and/or the muffle 3 (for example at one or more holes in the brackets 20) through the engagement of one or more fastening elements, such as set screws.
  • the present invention makes it possible to obtain one or more of the following advantages and to resolve one or more of the problems encountered in the prior art.
  • First of all the invention allows the times, costs and complexity of the process of assembling the muffle inside the external bearing structure of an oven to be reduced.
  • the present invention further enables the process of assembling the muffle inside the external bearing structure of the oven to be automated.
  • the present invention further enables a solid and stable fastening of the muffle to the external bearing structure of the oven to be obtained without operating on the lateral wall of the muffle.
  • the present invention hence allows the muffle to be fastened to the bearing structure of the oven non-invasively with respect to the lateral wall of the muffle; such fastening therefore does not compromise the final performance of any subsequent processing on the surface finish of the muffle surfaces facing towards the cooking chamber of the oven.
  • the present invention further allows a light and at the same time strong muffle to be made.
  • the invention is moreover convenient to use, easy to implement and simple and economical to construct.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

La présente invention concerne un four de cuisson ménager (1) comprenant une structure portante externe (2), un moufle (3) définissant une chambre de cuisson et logé à l'intérieur de la structure portante externe (2) et une porte (4) permettant d'accéder à la chambre de cuisson. Le moufle (3) comprend une ou plusieurs brides (10) et le four (1) comprend un ou plusieurs supports de fixation (20) conçus pour fixer le moufle (3) à la structure portante externe (2). Les supports de fixation (20) sont soudés aux brides respectives (10) du moufle (3), en particulier par l'intermédiaire d'un soudage par points, et sont en prise avec la structure portante externe (2).
PCT/IB2015/052398 2014-04-07 2015-04-01 Procédé d'assemblage d'un moufle à la structure d'un four et four comprenant un moufle assemblé selon le procédé WO2015155637A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15720453.8A EP3129714B1 (fr) 2014-04-07 2015-04-01 Procédé d'assemblage d'un moufle à la structure d'un four et four comprenant un moufle assemblé selon le procédé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20140641 2014-04-07
ITMI2014A000641 2014-04-07

Publications (1)

Publication Number Publication Date
WO2015155637A1 true WO2015155637A1 (fr) 2015-10-15

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Family Applications (1)

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PCT/IB2015/052398 WO2015155637A1 (fr) 2014-04-07 2015-04-01 Procédé d'assemblage d'un moufle à la structure d'un four et four comprenant un moufle assemblé selon le procédé

Country Status (2)

Country Link
EP (1) EP3129714B1 (fr)
WO (1) WO2015155637A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20160049A1 (it) * 2016-01-29 2017-07-29 Can S R L Cucina a gas a struttura semplificata nonche' suo metodo di montaggio
US20220034516A1 (en) * 2020-07-29 2022-02-03 Electrolux Home Products, Inc. Oven cavity wrapper having a structural embossment and associated convection features
US20220146113A1 (en) * 2020-11-06 2022-05-12 Guangdong Galanz Enterprises Co., Ltd. Cavity Structure for Accommodating Cooking Food and Cooking Device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1533998A (en) * 1924-05-26 1925-04-14 Tappan Stove Co Stove structure
US3038462A (en) * 1960-07-21 1962-06-12 Gen Electric Oven liner
US4161939A (en) * 1978-03-06 1979-07-24 Chambers Corporation Oven liner suspension assembly
FR2561357A1 (fr) * 1984-03-14 1985-09-20 Sofedem Enceinte de four menager et son procede de fabrication
EP0173543A2 (fr) * 1984-08-24 1986-03-05 BELLING & COMPANY LIMITED Appareil de cuisson comportant une disposition pour le montage d'un four
EP0606513A1 (fr) * 1993-01-15 1994-07-20 INOXVENETA S.p.A. Procédé pour fabriquer une enceinte, en particulier pour traitement de produits alimentaires et enceinte obtenue par ce procédé
GB2417770A (en) * 2004-09-07 2006-03-08 Bsh Bosch Siemens Hausgeraete Cooking oven

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB817518A (en) * 1956-05-17 1959-07-29 Simplex Electric Co Ltd Improvements relating to cooking stoves
US2557496A (en) * 1944-10-14 1951-06-19 American Stove Co Range

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1533998A (en) * 1924-05-26 1925-04-14 Tappan Stove Co Stove structure
US3038462A (en) * 1960-07-21 1962-06-12 Gen Electric Oven liner
US4161939A (en) * 1978-03-06 1979-07-24 Chambers Corporation Oven liner suspension assembly
FR2561357A1 (fr) * 1984-03-14 1985-09-20 Sofedem Enceinte de four menager et son procede de fabrication
EP0173543A2 (fr) * 1984-08-24 1986-03-05 BELLING & COMPANY LIMITED Appareil de cuisson comportant une disposition pour le montage d'un four
EP0606513A1 (fr) * 1993-01-15 1994-07-20 INOXVENETA S.p.A. Procédé pour fabriquer une enceinte, en particulier pour traitement de produits alimentaires et enceinte obtenue par ce procédé
GB2417770A (en) * 2004-09-07 2006-03-08 Bsh Bosch Siemens Hausgeraete Cooking oven

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20160049A1 (it) * 2016-01-29 2017-07-29 Can S R L Cucina a gas a struttura semplificata nonche' suo metodo di montaggio
US20220034516A1 (en) * 2020-07-29 2022-02-03 Electrolux Home Products, Inc. Oven cavity wrapper having a structural embossment and associated convection features
US20220146113A1 (en) * 2020-11-06 2022-05-12 Guangdong Galanz Enterprises Co., Ltd. Cavity Structure for Accommodating Cooking Food and Cooking Device

Also Published As

Publication number Publication date
EP3129714B1 (fr) 2020-02-26
EP3129714A1 (fr) 2017-02-15

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