EP2745055A1 - Appareil électroménager comportant un dispositif de protection contre les surtensions - Google Patents

Appareil électroménager comportant un dispositif de protection contre les surtensions

Info

Publication number
EP2745055A1
EP2745055A1 EP12746353.7A EP12746353A EP2745055A1 EP 2745055 A1 EP2745055 A1 EP 2745055A1 EP 12746353 A EP12746353 A EP 12746353A EP 2745055 A1 EP2745055 A1 EP 2745055A1
Authority
EP
European Patent Office
Prior art keywords
appliance device
layer
sections
insulating region
household 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.)
Granted
Application number
EP12746353.7A
Other languages
German (de)
English (en)
Other versions
EP2745055B1 (fr
Inventor
Jorge Alaman Aguilar
Miguel Angel BUÑUEL MAGDALENA
Diego Cuartielles Ruiz
Francisco Javier Ester Sola
Pilar Perez Cabeza
Fernando Planas Layunta
Rosario Romeo Velilla
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2745055A1 publication Critical patent/EP2745055A1/fr
Application granted granted Critical
Publication of EP2745055B1 publication Critical patent/EP2745055B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F24C15/104—Arrangements of connectors, grounding, supply wires

Definitions

  • the invention relates to a home appliance device according to the preamble of claim 1.
  • a domestic appliance device designed as a hob plate with a basic body made of a glass ceramic and a metallic coating on an underside of the basic body is known.
  • the coating has two sections which are electrically insulated from one another by an insulating region, one of the sections representing a sensor surface of a capacitive proximity sensor.
  • the object of the invention is in particular to provide a generic home appliance device with increased operating safety.
  • the invention relates to a household appliance device having a main body and at least one layer, which is arranged on at least one side portion of the base body and which has at least two sections and an insulating region which electrically isolates the sections against each other. It is proposed that the isolation region is intended to provide overvoltage protection of at least 1500V.
  • the insulating region is preferably provided to provide an overvoltage protection of at least 1600 V, in particular of at least 1700 V and particularly advantageously of at least 1750 V.
  • the term "provided” should be understood here and below to mean in particular specially designed and / or equipped. tion in particular as a home appliance plate.
  • a “base plate” is to be understood here as meaning, in particular, a spatial element which, when viewed in a plane in a plane perpendicular to the plane, has a non-circular cross-sectional area and perpendicular to the plane has an in particular at least substantially constant material thickness which is less than 50%, preferably less than 25% and particularly preferably less than 10%, of an extension of the spatial element parallel to the plane, in particular a smallest extension of the element parallel to the plane is to be understood as a "layer” is adapted to a shape of a surface of the base body, in particular the base plate, and in particular has a maximum thickness which is smaller than a minimum extension of the base body, in particular a minimum thickness of the base plate.
  • the maximum thickness of the layer is particularly advantageously between 20 nm and 100 nm.
  • the layer is a metallic layer, in particular a metallic coating, which particularly advantageously comprises stainless steel.
  • a "metallic” component is to be understood as meaning, in particular, a component which has at least one metallic property, the quantity of "metallic properties” in particular comprising an electrical conductivity of at least 10 5 S / m at 27 ° C., a thermal conductivity of at least 10 W / m / K at 27 ° C and mirror gloss.
  • a “side part region” of the main body is to be understood as meaning, in particular, an area of a surface of the main body, Preferably the side partial area extends over an entire, in an assembled state, one
  • the layer is applied to the side part region, preferably directly, in particular that the layer is attached to the side part region of the main body a coating method, in particular by a screen printing method, preferably by a chemical or physical applied by chemical vapor deposition and particularly advantageous by cathode sputtering on the side panel.
  • a “sputtering” is to be understood in particular a coating method in which atoms and / or molecules from a solid target by bombardment with high-energy ions, preferably noble gas ions are dissolved out, go into the gas phase and are deposited on the workpiece to be coated.
  • an "insulating region” is to be understood here and below as meaning a spatial region whose material differs from a material of the sections. ⁇ br/> ⁇ br/>
  • the material of the insulating region has different optical and / or electrical properties than the material of the sections
  • a chemical reaction in particular an oxidation or a decomposition, may result from the material of the parts, but the material of the insulating region is preferably formed by an ambient atmosphere and / or by a further material, in particular a material of a protective layer.
  • Protective layer should be understood in particular a spatial element which is adapted to a shape of a surface remote from the base plate surface of the layer and protects the layer against chemical and / or thermal and / or mechanical effects.
  • the protective layer has a higher chemical resistance in a given environment and / or a higher temperature resistance and / or a higher mechanical strength, in particular a higher hardness.
  • the insulating region electrically "insulates" the sections, it should be understood that the insulating zone at 20 ° C at any point has at least a resistivity of at least 10 10 ⁇ m, more preferably at least 10 11 ⁇ m, and preferably at least 10 ⁇ m having 12 Qm.
  • surge protection should be understood in particular a protection against electrical voltages that are above a given voltage threshold.
  • a potential difference corresponding to the voltage limit value or smaller maintained between the two sections of the layer so that in the potential difference between the two sections preferably a discharge, in particular a spark, is excluded from one of the two sections to the other section.
  • an advantageously higher operating safety can be ensured, since an overvoltage protection required for household appliances in DIN EN 60335-1: 2006 can be maintained, in particular if one of the sections can be detected by an operator in an operating state and / / or by electrically conductive components, in particular metallic
  • the household appliance is electrically connected to the operator. Furthermore, an electromagnetic compatibility can be improved, in particular if one of the sections is arranged in an assembled state above an induction heating element of an induction hob.
  • At least one of the sections is a sensor element for a proximity sensor.
  • a proximity sensor is to be understood as meaning, in particular, a sensor which, in at least one operating state, registers an approach of an object, in particular a finger of an operator, to the sensor element to register an approach of the object, in particular of the finger, by a change in an electric field whose electric field lines emanate, in particular, from the sensor element or end at the sensor element.
  • the sensor element thus preferably represents an electrode for the capacitive proximity sensor
  • a visually appealing integration of an operating element into the domestic appliance device can be achieved, in particular if the layer is at least partially metallic.
  • the insulating region is produced by laser processing.
  • the irradiation of the laser light leads to a physical change, in particular to an evaporation, and / or to a chemical change, in particular to an oxidation or decomposition.
  • production of the insulating region comprises laser machining, at least as an essential step. In this way, an advantageously precise, reproducible and rapid production of the insulating region can be made possible, in particular even with a complex geometry of the insulating region or with a plurality of insulating regions which are arranged in a complex pattern.
  • the insulating region is produced by laser ablation.
  • laser ablation is to be understood as meaning, in particular, laser processing in which a material irradiated by laser light is ablated, in particular vaporized at least as an essential step comprises laser ablation.
  • a minimum distance between the two sections is at least 1.5 mm, advantageously sufficient overvoltage protection can be achieved.
  • the minimum distance between the two sections is more than 2 mm, whereby the overvoltage protection can be further increased.
  • the minimum distance between the two sections is at most 10 mm.
  • the minimum distance between the two sections at most 4 mm, in particular a maximum of 3 mm and more preferably at most 2.5 mm.
  • Household appliance device comprises at least one protective layer, which is arranged in at least one subregion on a side remote from the base body side of the layer.
  • the protective layer is preferably electrically insulating and, in particular at 20 ° C., has a specific electrical resistance of at least 10 10 ⁇ m, in particular at least 10 11 ⁇ m and preferably 10 12 ⁇ m, at each point.
  • the protective layer is particularly advantageously applied by a coating method, in particular by a screen printing method. As a result, an advantageous protection of the layer can be provided. Furthermore, in particular in an environment with increased relative humidity, overvoltage protection can advantageously be increased.
  • FIG. 1 a shows a cooking appliance designed as a domestic appliance with a domestic appliance device in a plan view
  • FIG. 1 b shows the domestic appliance with the household appliance device with an insulating region produced by a laser ablation in a not to scale sectional view along a line Ib-Ib in Fig. 1 a
  • Fig. 2 shows another domestic appliance with a household appliance device with an insulating region produced by laser-induced oxidation in a not true to scale sectional view
  • Fig. 3 shows another household appliance with a household appliance device with an insulating protective layer in a not to scale sectional view.
  • FIG. 1a shows a domestic appliance designed as a hob 34a with a domestic appliance device designed as a hob plate 36a.
  • the cooktop panel 36a includes a base body 10a formed as a base plate 38a.
  • the main body 10a consists of a glass ceramic.
  • the main body 10a is at least partially transparent.
  • markings 42a are applied in a known manner on a top surface 40a in a known manner.
  • the markings 42a may be applied by a screen printing method. Markings 42a indicate heating zones 44a.
  • the hob plate 36 a is arranged horizontally in an operative state of the hob 34 a and provided for setting up cooking utensils on the top 40 a and the heating zones 44 a.
  • heating elements are arranged, which are provided for heating the cooking utensil erected on the corresponding heating zones 44a.
  • the heating elements can be any heating elements that appear appropriate to a person skilled in the art, but preferably induction heating elements for inductive heating of the cooking utensils.
  • Marking surfaces 42a further indicate contact surfaces 46a of an operator interface 48a of the household appliance.
  • the operator interface 48a further comprises a display unit 50a. By means of the user interface 48a, an operator can set a desired heating power and, if desired, a desired cooking program for each of the heating zones 44a.
  • An outer edge of the hob plate 36a is surrounded on all sides by a metallic holding frame 52a.
  • the holding frame 52a carries in a mounted state, all components of the household appliance. Further, the holding frame 52a is intended to be embedded in a causalabdeckplatte. As shown in Fig. 1b, the support frame 52a includes a circumferential flange 54a for supporting the hob 34a on the kitchen cover plate.
  • FIG. 1 b shows a sectional representation, not true to scale, of the domestic appliance along a line Ib-Ib in FIG. 1 a.
  • the main body 10a is coated on a side facing away from the top 40a, forming a side portion 14a bottom with a metallic layer 12a.
  • a layer thickness of the layer 12a is approximately 30 nm. With such a layer thickness, the display unit 50a can be seen in an operating state through the layer 12a.
  • the layer 12a is subdivided into a plurality of sections 16a, 18a, two of which are visible in FIG. 1b.
  • the two sections 16a, 18a are electrically insulated from each other by an insulating region 20a.
  • the insulating region 20a is formed in the present example by a recess in the layer 12a.
  • the section 18a is a sensor element 22a associated with one of the contact surfaces 46a for a proximity sensor 24a of the domestic appliance.
  • the portion 16a is an environment of the sensor element 22a.
  • the portion 16a contacts the metallic support frame 52a in an edge portion of the base plate 38a, and thus is at approximately the same electric potential as the support frame 52a.
  • the insulating region 20a provides overvoltage protection of 1750 V.
  • Another overvoltage protection of 1250 V is provided by the proximity sensor 24a. This results in a total overvoltage protection of 3000 V between a phase of a power supply of the domestic appliance and a touchable, electrically conductive component of the household appliance, in this case the holding frame 52 a of the hob 34 a.
  • a minimum distance 26a between the two sections 16a, 18a is approximately 1.5 mm.
  • the procedure is as follows.
  • the silk Partial area 14a of the main body 10a completely coated with the metallic layer 12a by means of a cathode sputtering.
  • the insulating region 20a is formed by laser processing, namely laser ablation with laser light. Since high power densities of the laser light are required for the laser processing, in particular pulsed lasers are suitable, preferably Nd: YAG laser or Nd: YV0 4 laser.
  • pulsed lasers are suitable, preferably Nd: YAG laser or Nd: YV0 4 laser.
  • FIG. 2 and 3 two further embodiments of the invention are shown.
  • the following descriptions are essentially limited to the differences between the exemplary embodiments, reference being made to the description of the other exemplary embodiments, in particular FIGS. 1 a and 1 b, with regard to components, features and functions remaining the same.
  • FIGS. 1 a and 1 b To distinguish the embodiments of the letter a in the reference numerals of the embodiment in Fig. 1 a and 1 b by the letters b and c in the reference numerals of the embodiments in FIGS. 2 and 3 replaced.
  • identically named components in particular with regard to components with the same reference numerals, reference may in principle also be made to the figures and / or the descriptions of the other exemplary embodiments, in particular FIGS. 1 a and 1 b.
  • FIG. 2 shows a sectional representation, not to scale, of a further domestic appliance with an alternative domestic appliance device.
  • the home appliance device is similar to that of the previous embodiment.
  • An insulating region 20b which sections 16b, 18b of a metallic layer 12b against each other elec- Risch insulated, is instead formed by a recess by an electrically insulating solid state material, which differs from a solid state material of the sections 16b, 18b.
  • a laser-induced reaction instead of a laser ablation takes place during laser processing, by means of which the solid-state material in the insulating region 20b is chemically altered. In the present case, the reaction forms dielectric metal oxide.
  • FIG. 3 shows a sectional representation, not to scale, of a further domestic appliance with a further alternative domestic appliance device.
  • the domestic appliance device essentially corresponds to the domestic appliance device from FIGS. 1 a and 1 b. It merely additionally has a dielectric protective layer 28c, which is arranged in at least one partial area 30c on a side 32c of a metallic layer 12c facing away from a main body 10c. A portion 18c of the layer 12c, which forms a sensor element 22c for a proximity sensor 24c, is kept free of the protective layer 28c in order not to adversely affect the secure operation of the proximity sensor 24c.
  • the protective layer 28c provides protection for the metallic layer 12c and may additionally increase overvoltage protection, particularly in an environment of increased relative humidity, since condensation of moisture on a portion 16c of the layer 12c adjacent to the section 18c may be avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

L'invention concerne un appareil électroménager comportant un corps de base (10a; 10b; 10c) et au moins une couche (12a; 12b; 12c) située sur au moins une zone partielle latérale (14a; 14b; 14c) du corps de base (10a; 10b; 10c) et présentant au moins deux éléments métalliques (16a, 18a; 16b, 18b; 16c, 18c) et une zone isolante (20a; 20b; 20c) qui isole électriquement les éléments (16a, 18a; 16b, 18b; 16c, 18c) les uns par rapport aux autres. L'objectif de l'invention est de créer un appareil électroménager du genre mentionné ci-dessus, présentant une sécurité d'utilisation accrue. À cet effet, la zone isolante (20a; 20b; 20c) est conçue pour assurer une protection contre les surtensions d'au moins 1500 V.
EP12746353.7A 2011-08-17 2012-08-14 Appareil comportant un dispositif de protection contre les surtensions Active EP2745055B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201131394 2011-08-17
PCT/EP2012/065889 WO2013024092A1 (fr) 2011-08-17 2012-08-14 Appareil électroménager comportant un dispositif de protection contre les surtensions

Publications (2)

Publication Number Publication Date
EP2745055A1 true EP2745055A1 (fr) 2014-06-25
EP2745055B1 EP2745055B1 (fr) 2017-05-17

Family

ID=46651527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12746353.7A Active EP2745055B1 (fr) 2011-08-17 2012-08-14 Appareil comportant un dispositif de protection contre les surtensions

Country Status (2)

Country Link
EP (1) EP2745055B1 (fr)
WO (1) WO2013024092A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10225337A1 (de) * 2002-06-06 2003-12-24 Schott Glas Kochsystem mit direkt geheizter Glaskeramikplatte
FR2894328B1 (fr) * 2005-12-05 2017-10-06 Eurokera Plaque vitroceramique transparente ou translucide et son procede de fabrication
CN102471142B (zh) * 2009-08-17 2016-02-24 Bsh家用电器有限公司 具有以金属涂敷的盖板的感应式加热烧煮盘
EP2559672B1 (fr) * 2009-08-17 2015-06-10 BSH Hausgeräte GmbH Plaque de recouvrement d'appareils ménagers avec couche d'interférence Fabry-Perot

Also Published As

Publication number Publication date
EP2745055B1 (fr) 2017-05-17
WO2013024092A1 (fr) 2013-02-21

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