Radiant heater element for use in grill and the like

• US 6,194,689 B1
• Filed: 05/11/1998
• Issued: 02/27/2001
• Est. Priority Date: 05/11/1998
• Status: Expired due to Term

• Current Assignee: Backer EHP Inc. (NIBE Industrier AB)
• Original Assignee: Emerson Electric Company
• Inventors: Griffiths, Simon P., Taylor, Christopher R.
• Primary Examiner(s): PAIK, SANG YEOP
• Application Number:
  US09/075,960
• Time in Patent Office: 1,023 Days
• Field of Search: 219/450.1, 219/451.1, 219/460.1, 219/461.1, 219/465.1, 219/466.1, 993/78, 994/22
• US Class Current: 219/450.1
• CPC Class Codes: A47J 37/0676 electrically heated

Abstract

A grill (100) includes a hot plate (102) on one side of which is a cooking surface (104) upon which food to be cooked is set. A heating unit (106) installed on the underside (108) of the hot plate is used to heat the grill so the cooking surface temperature is a desired temperature. The unit includes a radiant heating element (110) and a pan (114) in which the heating element is installed. A cavity (C) defined by the underside of the grill, a sidewall (118) of the pan, and a top surface (122) of an insulation material (120) in which the heating element is supported, is heated to a uniform temperature across the cavity, and the grill is heated to this temperature. This uniformity of temperature results in food placed anywhere on the grill rapidly heating to a desired temperature and the food being cooked uniformly throughout.

Claims

1. A grill for cooking food, comprising:

a grill surface having a top side comprising a cooking surface; and

at least one modular heating unit adapted to be modularly installed under a bottom side of said grill surface to heat said grill surface in a region generally above said heating unit, said at least one modular heating unit including a radiant heating element and a base upon which said heating element is supported;

wherein said at least one modular heating unit further comprises a pan having a bottom and circumferential side walls, said pan bottom being adapted to receive said heating element support base;

and wherein said circumferential side walls, said pan bottom, and an area of said bottom side of said grill surface cooperate to define a substantially sealed cavity having said radiant heating element disposed at a bottom thereof in a spaced-apart relation with said bottom of said hot plate.

2. The grill of claim 1 wherein the resulting cooking surface temperature is substantially uniform in said region generally above said at least one heating unit.

3. The grill of claim 2 where said at least one modular heating unit comprises a plurality of modular heating units sufficient to occupy substantially all of said bottom of said hot plate, said modular heating units being modularly installed adjacent to each other such that the cooking surface temperature is substantially uniform across substantially all of said cooking surface.

4. The grill of claim 1 wherein said at least one modular heating unit comprises a plurality of modular heating units, and wherein each of said plurality of modular heating units is separately removable so as to allow replacement thereof without requiring removal of others of said plurality of modular heating units.

5. The grill of claim 1, wherein said radiant heating element is arranged in a predetermined pattern within said heating unit.

6. The grill of claim 1 further including a controller for controlling the temperature of said heating element and for disrupting application of power to said heating element if the temperature of said cavity exceeds a predetermined temperature.

7. The grill of claim 1 wherein each heating element is an open coil heating element.

8. The grill of claim 1 wherein each heating element is a ribbon heating element.

9. A grill in accordance with claim 1, wherein said grill comprises at least six modular heating units, each cooperating with an underside region of said hot plate to define a separate, substantially sealed cavity.

10. The grill of claim wherein said heating element support base comprises a cake of insulation material sized to fit in said pan and having a surface upon which said heating element is supported, the height of said cake of insulation material being less than the height of said circumferential sidewalls of said pan so as to maintain said spaced-apart relation between said heating element and said bottom side of said hot plate.

11. A method of heating a region of a grill hot plate, comprising modularly installing a first modular heating unit beneath said region of said hot plate, such that a substantial seal is established between a pan defining a bottom and circumferential sides of said first modular heating unit and an underside of said hot plate, and defining a cavity generally beneath said region of said hot plate.

12. A method in accordance with claim 11, further comprising applying power to a radiant heating element disposed in said cavity.

13. A method in accordance with claim 12, further comprising sensing temperature within said cavity.

14. A method in accordance with claim 13, further comprising interrupting said application of power to said radiant heating element in response to detection of temperature in said cavity exceeding a predetermined level.

15. A method in accordance with claim 11, further comprising modularly installing at least a second modular heating unit beneath said hot plate adjacent to said first modular heating unit, thereby enlarging said heated region.

16. A modular heating unit adapted for modular installation beneath a grill surface of a grill for cooking food to heat an area of said grill surface generally above said heating unit, comprising:

a radiant heating element supported upon a base;

a pan having a bottom and circumferential side walls, said pan bottom being adapted to receive said heating element and said base;

wherein said circumferential side walls, said pan bottom, and an area of said bottom side of said grill surface cooperate to define a substantially sealed cavity having said radiant heating element disposed at a bottom thereof in a spaced-apart relation with said bottom of said hot plate.

17. A modular heating unit in accordance with claim 16, further comprising a temperature sensor disposed within said cavity.