Inductively heated hob having a metal-coated cover plate

Patent metadata

Field	Value
Publication number	US-9807822-B2
Application number	US-201013388465-A
Country	US
Kind code	B2
Filing date	Aug 6, 2010
Priority date	Aug 17, 2009
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A hob includes at least one heating inductor and a glass or glass ceramics cover plate that has at least one side coated with a metal layer coated with a metal layer. In order to improve the electromagnetic compatibility of the hob with a metal layer coating, the metal layer has a cover region which covers the heating inductor and is electrically insulated from a surrounding region of the metal layer, which surrounding region surrounds the cover region.

First claim

The invention claimed is:

1. A hob, comprising:
at least one heating inductor; and
a glass or glass ceramics cover plate having at least one side coated with a metal layer, said metal layer having a cover region which covers the heating inductor, and a surrounding region which surrounds the cover region, said cover region being electrically insulated from the surrounding region.

2. The hob of claim 1 , wherein the metal layer has a thickness which is less than 50% of a magnetic penetration depth of a magnetic field produced by the heating inductor into a material of the metal layer.

3. The hob of claim 1 , wherein the metal layer has a thickness which is less than 10% of a magnetic penetration depth of a magnetic field produced by the heating inductor into a material of the metal layer.

4. The hob of claim 1 , wherein the cover region is delimited by a linear interruption in the metal layer.

5. The hob of claim 4 , wherein the interruption has a width of at least 2 mm.

6. The hob of claim 4 , further comprising a dielectric colored layer applied to the cover plate at least in a region of the interruption.

7. The hob of claim 6 , wherein the dielectric colored layer at least partially covers the metal layer.

8. The hob of claim 4 , wherein the interruption is produced by applying a mask during application of the metal layer.

9. The hob of claim 4 , wherein the interruption is produced by removing material of the metal layer following application of the metal layer.

10. The hob of claim 1 , wherein the cover region comprises a plurality of sections that are electrically insulated from each other.

11. The hob of claim 10 , wherein the sections are arranged concentrically to each other.

12. The hob of claim 11 , wherein the sections have the form of concentric rings.

13. A method for producing a glass or glass ceramics cover plate for a hob, comprising:
coating at least one side of a cover plate with a metal layer; and
working an interruption into the metal layer to delimit a cover region of the metal layer, which cover region covers a heating inductor of the hob, and to electrically insulate the cover region from a surrounding region of the metal layer.

14. The hob of claim 1 , wherein the metal layer is directly adjacent to the cover plate.

15. The hob of claim 1 , wherein the cover region is separated from the surrounding region by a continuous interruption in the metal layer.

16. The hob of claim 15 , further comprising a dielectric colored layer applied to the cover plate at least in a region of the interruption.

17. The hob of claim 16 , wherein the dielectric colored layer at least partially covers the metal layer.

18. The hob of claim 17 , wherein the dielectric colored layer completely covers the metal layer.

19. The hob of claim 18 , wherein the metal layer is directly adjacent to the cover plate.

20. A hob, comprising:
an induction heater configured to heat a cooking vessel by producing a magnetic field that generates eddy currents in the cooking vessel; and
a glass or glass ceramics cover plate having a lower side directed to the induction heater, the cover plate having a metal layer applied to the lower side of the cover plate, the metal layer having
a cover region which covers the induction heater, and
a surrounding region which surrounds the cover region,

wherein the cover region is electrically insulated from the surrounding region.

Assignees

• Alonso Esteban Rafael
• Buñuel Magdalena Miguel Angel
• Ester Sola Francisco Javier
• Garcia Jimenez Jose-Ramon
• Pelayo Zueco Francisco Javier
• Perez Cabeza Pilar
• Planas Layunta Fernando
• Sancho Martinez Diego
• Subias Domingo Jesus Mario
• Villuendas Yuste Francisco
• Bsh Hausgeraete Gmbh

Inventors

• Alonso Esteban Rafael
• Buñuel Magdalena Miguel Angel
• Ester Sola Francisco Javier
• Garcia Jimenez Jose-Ramon
• Pelayo Zueco Francisco Javier
• Perez Cabeza Pilar
• Planas Layunta Fernando
• Sancho Martinez Diego
• Subias Domingo Jesus Mario
• Villuendas Yuste Francisco

Classifications

• C03C17/3605

  Coatings of the type glass/metal/inorganic compound · CPC title

• C03C17/36

  at least one coating being a metal · CPC title

• H05B6/1209 Primary

  induction cooking plates or the like and devices to be used in combination with them · CPC title

• C03C2218/36

  Underside coating of a glass sheet · CPC title