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WO2015151044A2 - Grille pour cuisinières - Google Patents

Grille pour cuisinières Download PDF

Info

Publication number
WO2015151044A2
WO2015151044A2 PCT/IB2015/052396 IB2015052396W WO2015151044A2 WO 2015151044 A2 WO2015151044 A2 WO 2015151044A2 IB 2015052396 W IB2015052396 W IB 2015052396W WO 2015151044 A2 WO2015151044 A2 WO 2015151044A2
Authority
WO
WIPO (PCT)
Prior art keywords
grate
thermochromic
cooking
grate according
elements
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.)
Ceased
Application number
PCT/IB2015/052396
Other languages
English (en)
Other versions
WO2015151044A3 (fr
Inventor
Leonardo Arteconi
Alberto Gasparini
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co SpA
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 Co SpA filed Critical Indesit Co SpA
Publication of WO2015151044A2 publication Critical patent/WO2015151044A2/fr
Publication of WO2015151044A3 publication Critical patent/WO2015151044A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/107—Pan supports or grates therefor

Definitions

  • the present invention relates to a grate for supporting pots over burners of cooking ranges, cooking tops, ovens and similar household cooking appliances .
  • the grates which are made of a metallic material (cast iron, steel or the like) that is heated by the flame under the pots while food is being cooked, can reach high temperatures, even hundreds of degrees.
  • the thermal capacity of the grates which is related to the metal they are made of, is rather high: therefore, it may take some minutes for the grates to cool down and return to ambient t empe r a tu re .
  • the temperature of the grates is usually uneven, i.e. it may be higher in some places and lower elsewhere; for example, this is the case wherein a grate is associated with two or more burners of a cooking top, and only one of them has been lighted on under a pot .
  • the present invention aims at improving this state of the art: therefore it is an object thereof to provide a grate for supporting pots over burners of cooking ranges, cooking tops and similar household cooking appliances, having such structural and functional features as to prevent, or at least reduce, the risk of accidents due to burns .
  • the idea underlying the present invention is to associate temperature indicator means with the grate, so that a user can immediately know the temperature conditions of the same.
  • the indicator means comprise thermochromic elements having a preset activation temperature, so as to provide an immediate indication of the thermal conditions of the points of the grate where they have been applied.
  • Fig. 1 is an elevation view of a cooking top incorporating a grate according to the invention
  • Fig. 2 is an axonometric view of a part of the cooking top of Fig. 1 ;
  • FIG. 1 shows a detail of the cooking top of the preceding figures.
  • reference numeral 1 designates as a whole a cooking top according to the invention, which in this case is a separate device to be inserted into the cabinet of a household kitchen (not shown in the drawings) .
  • the cooking top may however be a part of a cooking appliance on its own including an oven, or it may be designed in any manner appropriate for the intended use.
  • the cooking top is equipped with four gas burners 2, 3, 4 and 5, controlled by respective knobs 6 , 7 , 8 and 9 ; there are also two grates 10, 11 for supporting pots over it, laid on a base 12 of the cooking top 1.
  • the grates 10, 11 are made of metallic material, preferably cast iron or steel, and are optionally coated with an enamel layer; the base 12 is also made of metallic material, typically. stainless or enameled sheet metal, as commonly known in the art .
  • the number and arrangement of the seats may vary from case to case as a function of various parameters, such as the shape and dimensions of the grates, the number of burners, the height of the burners from the base of the cooking top, and more .
  • the seats 14-16 house respective thermochromic elements 24 , 25 , 26 ; the latter are not shown in Fig. 2 to highlight their respective seats; in a preferred embodiment, the thermochromic elements 24-26 are substantiall configured as adhesive labels applied into respective seats.
  • Thermochromic materials have the peculiarity of changing color depending on the temperature to which they are exposed; they are composed of colored pigments that may be organic, such as anil, spiropyrane, polyvinyl acetate resin, and hydroxides, or inorganic, based on Agl, Ag2HgI4, Hgl, Hgl2, SrTi03, often bound to cobalt or copper .
  • These pigments are used for making inks, thin films or even solid compounds, generally ceramic or fibrous ones.
  • thermochromic materials may be semiconductors, liquid crystals, fibrous, ceramic or of the metal matrix type .
  • pigments that expand and become transparent at a certain temperature; if they are laid on a colored surface, at that certain temperature the color of the surface will become visible.
  • Some examples of molecules that change their configuration depending on their exposition to temperature, UV rays or both are 'violet lactone' and 'spiroxazine' .
  • thermochromic materials can be applied in various forms to the grates 10, 11; for example, by subjecting the seats 14, 15 and 16 to silk-screening, painting or enameling processes; also, the characteristics of thermochromic materials can be associated with those of the substrate onto which they are applied, thus providing further information.
  • thermochromic material when the transition temperature is reached will make information, such as words, symbols or numbers, visible to the user, so that the latter will be warned about the t empe ra t ur e - re 1 a t ed danger.
  • thermochromic material when the activation temperature is exceeded, the thermochromic material will change color, becoming red and/or causing indications to appear, such as "hot”, "danger” or the activation temperature values corresponding to the temperature of the grate (e.g. 80 °C or 100 °C, etc . ) .
  • thermochromic material also refers to the case wherein it becomes transparent when the activation temperature is exceeded.
  • the substrate on which the material has been applied be it a sheet of paper or plastic, or the bottom of the seat 14, 15, 16 associated therewith, may be so coloured that the thermal activation of the material will cause the color, preferably red, or the sign, word, number, etc., as previously discussed, to appear.
  • the number of seats 14, 15 and 16, and hence the number of thermochromic elements 24, 25 and 26, may vary depending on various parameters, such as the shape and/or the dimensions of the grates, and the like.
  • thermochromic elements 24 , 25 , 26 arranged at various points of the grate 11 provide an immediate and easy-to-understand indication about the temperature of the grate itself.
  • thermochromic elements 24-26 are arranged at various points of the grate, they will provide different indications if the temperature of the grate at those respective points is different.
  • thermochromic elements can be applied to grates having configurations other than the one shown in the drawings, such as, for example, grates made from metal wire, like oven and grill grids, and the like.
  • the seats 14, 15 and 16 are a preferred feature of the invention, in that they provide optimal contact between the respective thermochromic element housed therein and the grate; furthermore, the thermochromic element housed in the seat is protected against shocks or other external agents (e.g. wash water, ⁇ grease) , which might otherwise damage it.
  • shocks or other external agents e.g. wash water, ⁇ grease
  • thermochromic elements 24, 25, 26 are glued or provided as adhesive labels, or applied to metal plates welded to the grate metal.
  • Thermochromic materials may then be provided as deemed appropriate, e.g. as a film or a plate, or as materials applied to the respective substrate (which may be metallic, synthetic or of any other nature) by painting, enameling and the like.
  • a temperature threshold value e.g. 80°C
  • thermochromic elements for this application are that they stay active for a wide preset temperature range above a preset transition value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

La présente invention concerne une grille permettant de supporter des casseroles sur des brûleurs de cuisinières à gaz, des surfaces de cuisson et des appareils ménagers similaires. Afin d'éviter qu'une personne ne se brûle lors de la manipulation d'une grille chaude, des éléments thermochromiques sont appliqués à cette dernière, qui sont activés lorsque des valeurs de température prédéterminées sont atteintes. De cette manière, les éléments thermochromiques fournissent une indication immédiate concernant un éventuel risque de brûlures. La grille ainsi obtenue peut par conséquent faire office de dispositif de sécurité contre les accidents domestiques.
PCT/IB2015/052396 2014-04-04 2015-04-01 Grille pour cuisinières Ceased WO2015151044A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20140281 2014-04-04
ITTO2014A000281 2014-04-04

Publications (2)

Publication Number Publication Date
WO2015151044A2 true WO2015151044A2 (fr) 2015-10-08
WO2015151044A3 WO2015151044A3 (fr) 2016-01-14

Family

ID=50943481

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2015/052396 Ceased WO2015151044A2 (fr) 2014-04-04 2015-04-01 Grille pour cuisinières

Country Status (1)

Country Link
WO (1) WO2015151044A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10309657B2 (en) 2016-06-30 2019-06-04 Midea Group Co., Ltd. Cooking grate with integrated venting
US11435086B2 (en) * 2019-11-18 2022-09-06 Haier Us Appliance Solutions, Inc. Cooktop appliance and methods of operation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781523A (en) * 1972-03-27 1973-12-25 Gen Electric Thermochromic surface heating apparatus
US20110088679A1 (en) * 2003-05-02 2011-04-21 Lerner William S Heating element accessory having warning device
DE102010042988A1 (de) * 2010-10-27 2012-05-03 BSH Bosch und Siemens Hausgeräte GmbH Topfträger und Gaskochstelle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10309657B2 (en) 2016-06-30 2019-06-04 Midea Group Co., Ltd. Cooking grate with integrated venting
US11435086B2 (en) * 2019-11-18 2022-09-06 Haier Us Appliance Solutions, Inc. Cooktop appliance and methods of operation

Also Published As

Publication number Publication date
WO2015151044A3 (fr) 2016-01-14

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