Method for performing a closed-door broiling operation with an electric oven

Patent metadata

Field	Value
Publication number	US-9920934-B2
Application number	US-201113316651-A
Country	US
Kind code	B2
Filing date	Dec 12, 2011
Priority date	Dec 12, 2011
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

A method of operating an electric oven includes generating a door-open signal if an oven door is in an open position. An electric broiling element is activated to perform an open-door broil operation in response to generation of the door-open signal. The temperature within a cooking chamber is determined during the open-door broil operation and the electric broiling element is deactivated if the temperature within the cooking chamber exceeds a first shutoff temperature. The method also includes generating a door-closed signal if the oven door is in a closed position. The electric broiling element is activated to perform a closed-door broil operation in response to generation of the door-closed signal. The temperature within the cooking chamber of the electric oven is determined during the closed-door broil operation and the electric broiling element is deactivated if the temperature within the cooking chamber exceeds a second shutoff temperature.

First claim

The invention claimed is:

1. A method of operating an electric oven, comprising:
generating a door-open signal, with an electronic control unit, if an oven door of the electric oven is positioned in an open position,
activating an electric broiling element of the electric oven to perform an open-door broil operation in response to generation of the door-open signal,
determining the temperature within a cooking chamber of the electric oven during the open-door broil operation and deactivating the electric broiling element if the temperature within the cooking chamber exceeds a first shutoff temperature,
generating a door-closed signal, with the electronic control unit, if an oven door of the electric oven is positioned in a closed position,
activating the electric broiling element of the electric oven to perform a closed-door broil operation in response to generation of the door-closed signal, and
determining the temperature within a cooking chamber of the electric oven during the closed-door broil operation and deactivating the electric broiling element if the temperature within the cooking chamber exceeds a second shutoff temperature, the second shutoff temperature being greater than the first shutoff temperature.

2. The method of claim 1 , wherein activating the electric broiling element of the electric oven to perform the closed-door broil operation comprises:
operating the electric broiling element at a predetermined power level for an initial period of time, and
subsequent to the initial period of time, cycling the electric broiling element between the predetermined power level and a lower power level at a predetermined duty cycle.

3. The method of claim 2 , wherein:
operating the electric broiling element at the predetermined power level for the initial period of time comprises operating the electric broiling element at a predetermined maximum power level for the initial period of time, and
cycling the electric broiling element between the predetermined power level and the lower power level at the predetermined duty cycle comprises cycling the electric broiling element between the predetermined maximum power level and a zero power level at the predetermined duty cycle.

4. The method of claim 2 , wherein activating the electric broiling element of the electric oven to perform the open-door broil operation comprises operating the electric broiling element at the predetermined power level.

5. The method of claim 2 , wherein activating the electric broiling element of the electric oven to perform the open-door broil operation comprises operating the electric broiling element at a predetermined maximum power level.

6. The method of claim 1 , wherein activating the electric broiling element of the electric oven to perform the closed-door broil operation comprises:
operating in a first broil mode based on a first user-selected input,
cycling the electric broiling element between a predetermined power level and a lower power level at a first predetermined duty cycle in the first broil mode,
operating in a second broil mode based on a second user-selected input, and
cycling the electric broiling element between the predetermined power level and the lower power level at a second predetermined duty cycle in the second broil mode, the second predetermined duty cycle being different from the first predetermined duty cycle.

7. The method of claim 6 , wherein:
cycling the electric broiling element between the predetermined power level and the lower power level at the first predetermined duty cycle comprises cycling the electric broiling element between a predetermined maximum power level and a zero power level at the first predetermined duty cycle, and
cycling the electric broiling element between the predetermined power level and the lower power level at the second predetermined duty cycle comprises cycling the electric broiling element between the predetermined maximum power level and the zero power level at the second predetermined duty cycle.

8. A method of operating an electric oven, comprising:
generating a door-closed signal, with an electronic control unit, if an oven door of the electric oven is positioned in a closed position,
operating an electric broiling element at a predetermined power level for an initial period of time in response to the door-closed signal, and
subsequent to the initial period of time, cycling the electric broiling element between the predetermined power level and a lower power level at a predetermined duty cycle.

9. The method of claim 8 , wherein:
operating the electric broiling element at a predetermined power level for an initial period of time comprises operating the electric broiling element at a predetermined maximum power level for the initial period of time, and
cycling the electric broiling element between the predetermined power level and a lower power level at a predetermined duty cycle comprises cycling the electric broiling element between the predetermined maximum power level and a zero power level at the predetermined duty cycle.

10. The method of claim 8 , further comprising:
generating a door-open signal if an oven door of the electric oven is positioned in an open position,
operating the electric broiling element at a second predetermined power level for an initial period of time in response to the door-open signal, and
subsequent to the initial period of time, cycling the electric broiling element between the second predetermined power level and a lower power level at a predetermined duty cycle.

11. The method of claim 10 , wherein:
operating the electric broiling element at a second predetermined power level for an initial period of time comprises operating the electric broiling element at a second predetermined maximum power level for the initial period of time, and
cycling the electrical broiling element between the second predetermined power level and a lower power level at a predetermined duty cycle comprises cycling the electric broiling element between the second predetermined maximum power level and a zero power level at the predetermined duty cycle.

12. The method of claim 8 , further comprising:
determining the temperature within a cooking chamber of the electric oven while the door-closed signal is being generated, and deactivating the electric broiling element if the temperature within the cooking chamber exceeds a door-closed shutoff temperature.

13. The method of claim 12 , further comprising:
determining the temperature within a cooking chamber of the electric oven while the door-open signal is being generated and deactivating the electric broiling element if the temperature within the cooking chamber exceeds a door-open shutoff temperature, the door-open shutoff temperature being less than the door-closed shutoff temperature.

14. The method of claim 8 , further comprising:
determining if the oven is operating in an energy save mode,
generating a door-open signal if an oven door of the electric oven is positioned in an open position,
indicating a “close door” message to a user if both
i) the oven is operating in an energy save mode, and
ii) if the oven door is positioned in an open position.

15. The method of claim 14 , wherein:
indicating a “close door” message comprises displaying the “close door” message on a user interface.

16. The method of claim 14 , wherein:
indicating a “close door” message comprises an audible signal.

17. A method of operating an electric oven, comprising:
determining if the electric oven is operating in an energy save mode,
generating a

Assignees

• Donarski Robert S
• Hines John F
• Johncock James C
• Whirlpool Co

Inventors

• Donarski Robert S
• Hines John F
• Johncock James C

Classifications

• F24C7/087

  of electric circuits regulating heat · CPC title

• F24C7/085 Primary

  on baking ovens · CPC title