Cooking appliance with a cooking plate and with a heating device thereunder

Patent metadata

Field	Value
Publication number	US-10798786-B2
Application number	US-201715827569-A
Country	US
Kind code	B2
Filing date	Nov 30, 2017
Priority date	Dec 2, 2016
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A cooking appliance has a cooking plate for the direct preparation of food products thereon and has a heating device thereunder, wherein the heating device runs parallel to the cooking plate and bears at least partially against the bottom side of the cooking plate. The heating device has a flat carrier disc running parallel to the cooking plate, on the bottom side and top side of which carrier disc there are arranged in each case heating means which in each case substantially cover the carrier disc. Both heating means have in each case a multiplicity of heating conductors to cover the bottom side and top side of the carrier disc. The carrier disc may be composed of micanite, and the heating conductors may be thick-film heating conductors.

First claim

That which is claimed:

1. A cooking appliance comprising:
a cooking plate; and
a heating device thereunder,
wherein:
said heating device runs parallel to said cooking plate and bears at least partially against a bottom side of said cooking plate;
said heating device comprises a flat carrier disc running parallel to said cooking plate;
on a bottom side and on a top side of said carrier disc, there are arranged in each case heating means which in each case cover said carrier disc;
both said heating means comprise in each case at least one heating conductor;
said carrier disc is composed of micanite;
said heating means comprises thick-film heating conductors as heating conductors, or are applied in a thick-film process to said carrier disc;
connection conductors are applied to said carrier disc, said connection conductors being composed of conductor material with electrical conductivity;
for each heating conductor, two electrical connection panels are connected to said connection conductors; and
opposing ends of each said heating conductor make contact with said connection conductors.

2. The cooking appliance according to claim 1 , wherein said heating device bears fully against said bottom side of said cooking plate.

3. The cooking appliance according to claim 1 , wherein a central region of said carrier disc is free on both sides of said carrier disc from heating conductors.

4. The cooking appliance according to claim 1 , wherein a surface power density per side of said heating device lies between 0.5 W/cm 2 and 15 W/cm 2 .

5. The cooking appliance according to claim 1 , wherein:
said heating device comprises, above said carrier disc or above said heating means on said top side of said carrier disc, an areal heating device; and
said areal heating device bears directly and immediately against a bottom side of said cooking plate.

6. The cooking appliance according to claim 1 , wherein said cooking plate is composed of an electrically insulating material.

7. The cooking appliance according to claim 6 , wherein said electrically insulating material is from the group: hard glass, glass ceramic, ceramic, and natural stone.

8. The cooking appliance according to claim 1 , wherein:
said cooking appliance is, at its top side, formed, by said cooking plate; and
said cooking appliance comprises, below said cooking plate, a flat housing which surrounds and accommodates said heating device laterally outwardly and downwardly.

9. The cooking appliance according to claim 8 , wherein said housing comprises, at an inside, a thermal insulation which surrounds said heating device laterally outwardly and/or downwardly.

10. The cooking appliance according to claim 1 , wherein a temperature sensor on said heating device is provided.

11. The cooking appliance according to claim 10 , wherein said temperature sensor is arranged between said heating device and a bottom side of said cooking plate, or bears directly and immediately against said bottom side of said cooking plate.

12. The cooking appliance according to claim 10 , wherein a spacing of said temperature sensor to one said heating conductor is greater than a combined thickness of said cooking plate and of said carrier.

13. A cooking appliance comprising:
a cooking plate; and
a heating device thereunder,
wherein:
said heating device runs parallel to said cooking plate and bears at least partially against a bottom side of said cooking plate;
said heating device comprises a flat carrier disc running parallel to said cooking plate;
on a bottom side and on a top side of said carrier disc, there are arranged in each case heating means which in each case cover said carrier disc;
both said heating means comprise in each case at least one heating conductor;
said carrier disc is provided with an electrical insulation at least in a region of said heating means, and
said carrier disc is metallic and composed of a material from the group: steel, high-grade steel, composite materials with aluminum, copper and high-grade steel.

14. The cooking appliance according to claim 13 , wherein at least one of:
said heating device bears fully against said bottom side of said cooking plate; or
a central region of said carrier disc is free on both sides of said carrier disc from heating conductors.

15. The cooking appliance according to claim 13 , wherein:
said heating device comprises, above said carrier disc or above said heating means on said top side of said carrier disc, an areal heating device; and
said areal heating device bears directly and immediately against a bottom side of said cooking plate.

16. The cooking appliance according to claim 13 , wherein a temperature sensor on said heating device is provided.

17. The cooking appliance according to claim 16 , wherein at least one of:
said temperature sensor is arranged between said heating device and a bottom side of said cooking plate, or bears directly and immediately against said bottom side of said cooking plate; or
a spacing of said temperature sensor to one said heating conductor is greater than a combined thickness of said cooking plate and of said carrier.

18. A cooking appliance comprising:
a cooking plate; and
a heating device thereunder,
wherein:
said heating device runs parallel to said cooking plate and bears at least partially against a bottom side of said cooking plate;
said heating device comprises a flat carrier disc running parallel to said cooking plate;
on a bottom side and on a top side of said carrier disc, there are arranged in each case heating means which in each case cover said carrier disc;
both said heating means comprise in each case at least one heating conductor;
said heating means comprises thick-film heating conductors as heating conductors, or are applied in a thick-film process to said carrier disc;
connection conductors are provided being applied to said carrier disc;
said connection conductors are composed of conductor material with very good electrical conductivity;
for each heating means, two electrical connection panels are provided being connected to said connection conductors; and
said heating conductors, at their two opposite ends defined by a current flow direction, make contact with said connection conductors.

19. The cooking appliance according to claim 18 , wherein at least one of:
said heating device bears fully against said bottom side of said cooking plate; or
a central region of said carrier disc is free on both sides of said carrier disc from heating conductors.

20. The cooking appliance according to claim 18 , wherein:
said cooking appliance is, at its top side, formed, by said cooking plate;
said cooking appliance comprises, below said cooking plate, a flat housing which surrounds and accommodates said heating device laterally outwardly and downwardly; and
said housing comprises, at an inside, a thermal insulation which surrounds said heating device laterally outwardly and/or downwardly.

21. The cooking appliance according to claim 18 , wherein a temperature sensor on said heating device is provided.

22. The cooking appliance according to claim 21 , wherein at least one of:
said temperature sensor is arranged between said heating device and a bottom side of said cooking plate, or bears directly and immediately against said bottom side of said cooking plate; or
a spacing of said temperature sensor to one said heating conductor is greater than a combined thickness of said cooking p

Assignees

• Ego Elektro Geraetebau Gmbh

Inventors

• Roth Martin
• Block Volker
• Mandl Matthias
• Tafferner Michael

Classifications

• A47J37/0676 Primary

  electrically heated · CPC title

• H05B3/748

  Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater (H05B3/742 takes precedence) · CPC title

• H05B3/68

  Heating arrangements specially adapted for cooking plates or analogous hot-plates · CPC title

• H05B3/74 Primary

  Non-metallic plates {, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits} · CPC title