WO2015185284A1 - A cooking device comprising coating material - Google Patents

A cooking device comprising coating material Download PDF

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Publication number
WO2015185284A1
WO2015185284A1 PCT/EP2015/059043 EP2015059043W WO2015185284A1 WO 2015185284 A1 WO2015185284 A1 WO 2015185284A1 EP 2015059043 W EP2015059043 W EP 2015059043W WO 2015185284 A1 WO2015185284 A1 WO 2015185284A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass surface
coated
cooking device
electrical conductivity
low electrical
Prior art date
Application number
PCT/EP2015/059043
Other languages
French (fr)
Inventor
Basak BENGU
Bekir Ozyurt
Asli GENCER OZEL
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2015185284A1 publication Critical patent/WO2015185284A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
    • C03C17/3417—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials all coatings being oxide coatings
    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/90—Other aspects of coatings
    • C03C2217/94—Transparent conductive oxide layers [TCO] being part of a multilayer coating
    • C03C2217/948—Layers comprising indium tin oxide [ITO]

Definitions

  • the present invention relates to a cooking device comprising a surface having coating material.
  • ITO Indium Tin Oxide
  • the surfaces forming the body also provide the heating process by means of the ITO material with high electrical conductivity.
  • the ITO material loses its stability due to high power values it is subjected to and surface defects occur on surfaces coated with the material. Therefore, the heating effectiveness of surfaces coated with ITO material decreases.
  • the defects formed on the ITO coated surface due to impact causes current to be interrupted and the coating loses its function as the heater.
  • the aim of the present invention is the realization of a cooking device that is enabled to operate properly and the energy consumption of which is decreased.
  • the cooking device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a body wherein the foods to be cooked are placed. At least one surface of the body isolating the foods placed therein from the outside environment is produced from glass material.
  • the glass material is coated by Indium Tin Oxide which is a kind of metal oxide.
  • Strip-shaped materials with low resistance for example copper plate
  • Indium Tin Oxide with an adhesion material having high conductivity value like silver paste are connected to the power supply and create current on ITO and the ITO coated glass surface functions as a heater.
  • the cooking device operating without using an additional heater, enable the foods inside the body to be seen from outside by means of the glass surfaces.
  • a material with low electrical conductivity is coated on the glass surface so as to remain between the glass surface and the ITO.
  • the material with low electrical conductivity in the glass surface operating at high power values, functioning as the heater and produced by using ITO, the continuity of the current passing through the glass surface is provided by covering its surface defects.
  • the glass surface is coated with a material having low electrical conductivity which is silicon dioxide. Silicon dioxide is preferred due to its low electrical conductivity value and its transparency.
  • the glass surface is coated with a material having low electrical conductivity which is titanium dioxide.
  • the surface roughness of the glass surface, on which the material having low electrical conductivity is coated is approximately 5 nanometers.
  • ITO coating of approximately 20 nm to 40 nm thickness is applied on the glass surface. Unprocessed glass surfaces with a surface roughness between 5 to 20 nm decrease in surface roughness by means of coating with a material having low electrical conductivity. Consequently, the surface defects on the glass surface that cause interruption in the delivered current are prevented.
  • the mechanical strength of the ITO coated glass surface is increased by applying a protective coating on the ITO coated glass surface thereby formation of surface defects due to impacts on ITO is prevented and the current is dispersed on the glass surface homogeneously, without interruption.
  • the glass surface is coated with a material having low electrical conductivity that enables a more stable surface by preventing alkali ion migration over ITO.
  • Figure 1 – is the perspective view of a cooking device.
  • Figure 2 – is the schematic view of the glass surface, the material having low electrical conductivity and the ITO coating related to an embodiment of the present invention.
  • Figure 3 – is the schematic view of the glass surface, the ITO coating and the conductive plates related to an embodiment of the present invention.
  • the cooking device (1) comprises a body (2) that enables foods to be cooked to be placed therein, at least one surface of which is a glass surface (3) coated with Indium Tin Oxide and having at least two conductive plates (L) thereon which are connected to the power supply. At least two strip- shaped conductive plates (L) adhered oppositely on Indium Tin Oxide with an adhesion material having high conductivity value like silver paste, are connected to the power supply and create current on ITO and the ITO coated glass surface (3) functions as a heater. By means of the glass surface (3), the foods placed into the body (2) can be controlled visually without opening the door of the cooking device (1).
  • the cooking device (1) of the present invention comprises a material (M) with low electrical conductivity that is coated on the glass surface (3) and the Indium Tin Oxide (ITO) coated on the glass surface (3) that is coated with a material having low electrical conductivity.
  • the glass surface (3) coated with the material (M) having low electrical conductivity prevents ion migration over ITO thus providing a more stable surface.
  • the current is enabled to disperse on the glass surface (3) homogeneously and uninterruptedly and the efficiency of the heating function is increased.
  • the glass surface (3) is coated with the material (M) having low electrical conductivity, which is silicon dioxide (SiO 2 ).
  • the silicon dioxide (SiO2) coating covers the surface defects without deteriorating the light transmittance of the glass surface (3) since it is transparent.
  • the surface roughness of the glass surface (3), coated with the material (M) having low electrical conductivity is approximately 5 nanometers thick.
  • the surface roughness of ITO coating applied on the glass surface (3) is different from the surface roughness of the glass surface (3).
  • the material (M) having low electrical conductivity is applied on the glass surface (3), so as to form an intermediate layer between the glass surface (3) and ITO.
  • the material (M) having low electrical conductivity is applied on the glass surface (3) by the PVD method.
  • the material (M) having low electrical conductivity is applied on the glass surface (3) by the CVD method.
  • the material (M) having low electrical conductivity is applied on the glass surface (3) by the sol-gel method.
  • every surface of the body (2) is glass. Consequently, a transparent cooking device (1) is realized wherein the foods to be cooked can be controlled visually regardless of where the user stands.
  • the surface roughness of the glass surface (3) is decreased and the stability is increased by coating a material (M) having low electrical conductivity on the glass surface (3) so as to remain between ITO which is a metal oxide and the glass surface (3) forming the body (2) of the cooking device (1).
  • a material (M) having low electrical conductivity on the glass surface (3) so as to remain between ITO which is a metal oxide and the glass surface (3) forming the body (2) of the cooking device (1).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Surface Treatment Of Glass (AREA)
  • Surface Heating Bodies (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

The present invention relates to a cooking device (1) that comprises a body (2) enabling to place the foods to be cooked therein, at least one surface of which is a glass surface (3) connected to the power supply and functioning as a heater, and that is enabled to operate properly and wherein energy consumption is decreased. By means of the present invention, the surface roughness of the glass surface (3) is decreased and the stability is increased by coating a material (M) having low electrical conductivity on the glass surface (3) so as to remain between ITO which is a metal oxide and the glass surface (3) forming the body (2) of the cooking device (1).

Description

A COOKING DEVICE COMPRISING COATING MATERIAL
The present invention relates to a cooking device comprising a surface having coating material.
In state of the art transparent cooking devices, the use of Indium Tin Oxide (ITO) with high electrical conductivity and optical transmittance, that is coated on the glass surfaces forming the body of the transparent cooking device is known. ITO effectively conducts the current in the surfaces whereon it is coated When current is delivered to the copper wires disposed on the glass, the surfaces forming the body also provide the heating process by means of the ITO material with high electrical conductivity. In cooking devices that are operated at high temperatures, the ITO material loses its stability due to high power values it is subjected to and surface defects occur on surfaces coated with the material. Therefore, the heating effectiveness of surfaces coated with ITO material decreases. Moreover, even though not visible, the defects formed on the ITO coated surface due to impact causes current to be interrupted and the coating loses its function as the heater.
In the state of the art Korean Patent Application No. KR20100037324, a diffusion stopper is disclosed, that is implemented to prevent the ions that may migrate from the glass surface to the ITO film.
The aim of the present invention is the realization of a cooking device that is enabled to operate properly and the energy consumption of which is decreased.
The cooking device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a body wherein the foods to be cooked are placed. At least one surface of the body isolating the foods placed therein from the outside environment is produced from glass material. The glass material is coated by Indium Tin Oxide which is a kind of metal oxide. Strip-shaped materials with low resistance (for example copper plate), preferably adhered oppositely on Indium Tin Oxide with an adhesion material having high conductivity value like silver paste, are connected to the power supply and create current on ITO and the ITO coated glass surface functions as a heater. Thus, the cooking device operating without using an additional heater, enable the foods inside the body to be seen from outside by means of the glass surfaces.
In the cooking device of the present invention, a material with low electrical conductivity is coated on the glass surface so as to remain between the glass surface and the ITO. By means of the material with low electrical conductivity, in the glass surface operating at high power values, functioning as the heater and produced by using ITO, the continuity of the current passing through the glass surface is provided by covering its surface defects.
In an embodiment of the present invention, the glass surface is coated with a material having low electrical conductivity which is silicon dioxide. Silicon dioxide is preferred due to its low electrical conductivity value and its transparency.
In an embodiment of the present invention, the glass surface is coated with a material having low electrical conductivity which is titanium dioxide.
In an embodiment of the present invention, the surface roughness of the glass surface, on which the material having low electrical conductivity is coated, is approximately 5 nanometers. In order to produce the glass surface that functions as the heater at high power values (400 – 1100 Watt), ITO coating of approximately 20 nm to 40 nm thickness is applied on the glass surface. Unprocessed glass surfaces with a surface roughness between 5 to 20 nm decrease in surface roughness by means of coating with a material having low electrical conductivity. Consequently, the surface defects on the glass surface that cause interruption in the delivered current are prevented.
In an embodiment of the present invention, the mechanical strength of the ITO coated glass surface is increased by applying a protective coating on the ITO coated glass surface thereby formation of surface defects due to impacts on ITO is prevented and the current is dispersed on the glass surface homogeneously, without interruption.
In an embodiment of the present invention, the glass surface is coated with a material having low electrical conductivity that enables a more stable surface by preventing alkali ion migration over ITO.
The cooking device realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 – is the perspective view of a cooking device.
Figure 2 – is the schematic view of the glass surface, the material having low electrical conductivity and the ITO coating related to an embodiment of the present invention.
Figure 3 – is the schematic view of the glass surface, the ITO coating and the conductive plates related to an embodiment of the present invention.
The elements illustrated in the figures are numbered as follows:
1 - Cooking device
2 -Body
3 - Glass surface
The cooking device (1) comprises a body (2) that enables foods to be cooked to be placed therein, at least one surface of which is a glass surface (3) coated with Indium Tin Oxide and having at least two conductive plates (L) thereon which are connected to the power supply. At least two strip- shaped conductive plates (L) adhered oppositely on Indium Tin Oxide with an adhesion material having high conductivity value like silver paste, are connected to the power supply and create current on ITO and the ITO coated glass surface (3) functions as a heater. By means of the glass surface (3), the foods placed into the body (2) can be controlled visually without opening the door of the cooking device (1).
The cooking device (1) of the present invention comprises a material (M) with low electrical conductivity that is coated on the glass surface (3) and the Indium Tin Oxide (ITO) coated on the glass surface (3) that is coated with a material having low electrical conductivity. The glass surface (3) coated with the material (M) having low electrical conductivity prevents ion migration over ITO thus providing a more stable surface. Thus, the current is enabled to disperse on the glass surface (3) homogeneously and uninterruptedly and the efficiency of the heating function is increased.
In an embodiment of the present invention, the glass surface (3) is coated with the material (M) having low electrical conductivity, which is silicon dioxide (SiO2). The silicon dioxide (SiO2) coating covers the surface defects without deteriorating the light transmittance of the glass surface (3) since it is transparent.
In an embodiment of the present invention, the surface roughness of the glass surface (3), coated with the material (M) having low electrical conductivity, is approximately 5 nanometers thick. The surface roughness of ITO coating applied on the glass surface (3) is different from the surface roughness of the glass surface (3). In order for the ITO coating, applied as a very thin film, to cover the surface defects on the glass surface (3) homogeneously, the material (M) having low electrical conductivity is applied on the glass surface (3), so as to form an intermediate layer between the glass surface (3) and ITO.
In an embodiment of the present invention, the material (M) having low electrical conductivity is applied on the glass surface (3) by the PVD method.
In another embodiment of the present invention, the material (M) having low electrical conductivity is applied on the glass surface (3) by the CVD method.
In another embodiment of the present invention, the material (M) having low electrical conductivity is applied on the glass surface (3) by the sol-gel method.
In an embodiment of the present invention, every surface of the body (2) is glass. Consequently, a transparent cooking device (1) is realized wherein the foods to be cooked can be controlled visually regardless of where the user stands.
By means of the present invention, the surface roughness of the glass surface (3) is decreased and the stability is increased by coating a material (M) having low electrical conductivity on the glass surface (3) so as to remain between ITO which is a metal oxide and the glass surface (3) forming the body (2) of the cooking device (1). Thus, the current on the glass surface (3) is not interrupted and the glass surface (3) coated by ITO is enabled to perform its heating function effectively.

Claims (7)

  1. A cooking device (1) comprising a body (2) enabling food to be cooked to be placed therein, at least one surface of which is a glass surface (3) coated with Indium Tin Oxide, whereon at least two conductive plates (L) are disposed, connected to the power supply, characterized by a material (M) having low electrical conductivity coated on the glass surface (3) and Indium Tin Oxide (ITO) coated on the glass surface (3) that is coated with a material having low electrical conductivity.
  2. A cooking device (1) as in Claim 1, characterized by the glass surface (3) that is coated by the material (M) having low electrical conductivity which is silicon dioxide (SiO2).
  3. A cooking device (1) as in Claim 1, characterized by the glass surface (3) that is coated by the material (M) having low electrical conductivity which is titanium dioxide (TiO2).
  4. A cooking device (1) as in any one of the above claims, characterized by the glass surface (3), the surface roughness thickness of which is kept at approximately 5 nanometers by coating with the material (M) having low electrical conductivity.
  5. A cooking device (1) as in any one of the above claims, characterized by the glass surface (3), which is coated with the material (M) having low electrical conductivity by the PVD method.
  6. A cooking device (1) as in any one of the above claims, characterized by the glass surface (3), which is coated with the material (M) having low electrical conductivity providing a more stable surface by preventing alkali ion migration over ITO.
  7. A transparent cooking device (1), characterized by the body (2), every surface of which is glass.
PCT/EP2015/059043 2014-06-06 2015-04-27 A cooking device comprising coating material WO2015185284A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2014/06521 2014-06-06
TR201406521 2014-06-06

Publications (1)

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WO2015185284A1 true WO2015185284A1 (en) 2015-12-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11706844B2 (en) 2017-09-29 2023-07-18 Verniciature Bresciane S.R.L. Cooktop with a heating coating

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1505354A1 (en) * 2002-05-16 2005-02-09 Nippon Electric Glass Co., Ltd Cooking top plate
KR20100037324A (en) 2008-10-01 2010-04-09 한국세라믹기술원 The manufacturing method and indium tin oxide(ito) thin films deposited on the soda lime glass substrate having barrier layer
WO2012058400A1 (en) * 2010-10-29 2012-05-03 Cardinal Solar Technologies Company Tco coating and coated substrate for high temperature applications
US20130140293A1 (en) * 2011-06-06 2013-06-06 Schott Ag High-strength colored glass ceramics as a cooktop, smooth on both sides

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1505354A1 (en) * 2002-05-16 2005-02-09 Nippon Electric Glass Co., Ltd Cooking top plate
KR20100037324A (en) 2008-10-01 2010-04-09 한국세라믹기술원 The manufacturing method and indium tin oxide(ito) thin films deposited on the soda lime glass substrate having barrier layer
WO2012058400A1 (en) * 2010-10-29 2012-05-03 Cardinal Solar Technologies Company Tco coating and coated substrate for high temperature applications
US20130140293A1 (en) * 2011-06-06 2013-06-06 Schott Ag High-strength colored glass ceramics as a cooktop, smooth on both sides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11706844B2 (en) 2017-09-29 2023-07-18 Verniciature Bresciane S.R.L. Cooktop with a heating coating

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