INDUCTION HOB WITH INDUCTION COILS AND AN APPARATUS FOR DETERMINING THE TEMPERATURES ON THE INDUCTION COILS

• US 20120241441A1
• Filed: 12/20/2010
• Published: 09/27/2012
• Est. Priority Date: 12/19/2009
• Status: Active Grant

• Current Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Original Assignee: Electrolux Home Products Incorporated (AB Electrolux)
• Inventors: Rigolle, Thibaut, Viroli, Alex, Laurent, Jeanneteau, Martini, Filippo
• Granted Patent: US 9,794,988 B2
• Time in Patent Office: Days
• US Class Current: 219/647
• CPC Class Codes: H05B 2213/03 Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate
• CPC Class Codes: H05B 2213/07 Heating plates with temperature control means
• CPC Class Codes: H05B 6/062 for cooking plates or the like

Abstract

The present invention relates to an induction hob with a number of induction coils (12) on a cooking surface (10) and an apparatus for determining the temperatures on the induction coils (12). The induction coils (12) are arranged on the cooking surface (10) according to a predetermined scheme. At least one temperature sensor (14, 16, 18, 20; 24, 26) is arranged within an intermediate space between two or more induction coils (12). The at least one temperature sensor (14, 16, 18, 20; 24, 26) and the central portions of at least two adjacent induction coils (12) are thermally connected by heat conductor elements (22). The temperature sensors (14, 16, 18, 20; 24, 26) are electrically connected to at least one evaluation circuit for determining the temperatures of the adjacent induction coils (12).

Claims

1. An induction hob with a number of induction coils (12) on a cooking surface (10) and an apparatus for determining the temperatures on the induction coils (12), wherein:

the induction coils (12) are arranged on the cooking surface (10) according to predetermined scheme,

at least one temperature sensor (14, 16, 18, 20;

24, 26) is arranged within an intermediate space between two or more induction coils (12),

the at least one temperature sensor (14, 16, 18, 20;

24, 26) and the central portions of at least two adjacent induction coils (12) are thermally connected by heat conductor elements (22), and

the temperature sensors (14, 16, 18, 20;

24, 26) are connected to at least one evaluation circuit for determining the temperatures of the adjacent induction coils (12).

2. The induction hob according to claim 1, characterized in, that at least a part of the induction coils (12) is arranged as a matrix on the cooking surface (10) or at least on a section of the cooking surface (10).

3. The induction hob according to claim 1, characterized in, that at least a part of the induction coils (12) is arranged as a honeycomb on the cooking surface (10) or at least on a section of the cooking surface (10).

4. The induction hob according to claim 1, characterized in, that the at least one evaluation circuit takes into account the adjacent temperature sensors (14, 16, 18, 20;

24, 26) of the induction coil (12) in order to determine the temperature of said induction coil (12).

5. The induction hob according to claim 1, characterized in, that at least one temperature sensor (14, 16, 18, 20;

24, 26) is arranged within at least one intermediate space between three induction coils (12), wherein said induction coils (12) form a triangle on the cooking surface (10).

6. The induction hob according to claim 1, characterized in, that at least one temperature sensor (14, 16, 18, 20;

24, 26) is arranged within at least one intermediate space between four induction coils (12), wherein said induction coils (12) form a rectangle or a square on the cooking surface (10).

7. The induction hob according to claim 1, characterized in, that at least one heat conductor element (22) is formed as an elongated sheet.

8. The induction hob according to claim 7, characterized in, that at least one heat conductor element (22) is triangular, wherein the most acute angle of said triangular heat conductor element (22) is thermally connected to the central portion of the induction coil (12).

9. The induction hob according to claim 1, characterized in, that at least one temperature sensor (28) is arranged in central portion of the induction coil (12).

10. The induction hob according to claim 9, characterized in, that the at least one temperature sensor (28) is connected to an adjacent intermediate space between two or more induction coils (12) by a further heat conductor element (22).

11. The induction hob according to claim 10, characterized in, that at least one further heat conductor element (22) is an elongated triangular sheet, wherein the most acute angle of said triangular heat conductor element (22) is thermally connected to the adjacent intermediate space.

12. The induction hob according to claim 1, characterized in, that at least one heat conductor elements (22) is made of metal, in particular made of aluminium.