COOKTOP APPLIANCE

• US 20190072280A1
• Filed: 09/06/2017
• Published: 03/07/2019
• Est. Priority Date: 09/06/2017
• Status: Active Grant

• Current Assignee: Haier US Appliance Solutions, Inc. DBA GE Appliances (Haier Group Company)
• Original Assignee: Haier US Appliance Solutions, Inc. DBA GE Appliances (Haier Group Company)
• Inventors: Park, Seung-Yeong, Jeon, Woong, Lee, Kyungjun
• Granted Patent: US 10,641,497 B2
• Time in Patent Office: Days
• CPC Class Codes: F24C 7/083 on tops, hot plates
• CPC Class Codes: F24C 7/087 of electric circuits regulating heat
• CPC Class Codes: H05B 1/0266 Cooktops
• 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

A cooktop appliance includes an electric heating element positioned on a cooktop surface and a controller operably connected thereto. The controller is configured for monitoring a temperature with a temperature sensor, adjusting a power level of the electric heating element based at least in part on the monitored temperature over a first period of time, and deactivating the electric heating element for a second period of time based at least in part on the monitored temperature. The controller is also configured for storing the first period of time, an average power level over the first period of time, and the second period of time in a memory. When the controller detects a disconnection of the temperature sensor, the controller operates the heating element at the stored average power level for the stored first period of time and deactivates the heating element for the stored second period of time.

Claims

1. A cooktop appliance, comprising:

an electric heating element positioned on a cooktop surface of the cooktop appliance; and

a controller operably connected to the electric heating element, the controller configured for;

generating a temperature setting;

initiating a preheat cycle, the preheat cycle comprising operating the electric heating element at a predetermined power level corresponding to the temperature setting and monitoring a temperature with a temperature sensor until the monitored temperature reaches the temperature setting;

initiating a duty cycle when the monitored temperature reaches the temperature setting, the duty cycle comprising monitoring the temperature with the temperature sensor, calculating a difference between the monitored temperature and the temperature setting, operating the electric heating element over a first period of time at multiple distinct power levels based at least in part on the calculated difference between the monitored temperature and the temperature setting, and deactivating the electric heating element for a second period of time based at least in part on the calculated difference between the monitored temperature and the temperature setting;

storing the first period of time in a memory of the controller;

storing an average of the multiple distinct power levels in the memory of the controller;

storing the second period of time in the memory of the controller;

detecting a disconnection of the temperature sensor;

operating the heating element at the stored average power level for a duration of time equal to the stored first period of time; and

deactivating the heating element for a duration of time equal to the stored second period of time.

2. The cooktop appliance of claim 1, wherein the monitored temperature is a temperature associated with a cooking utensil positioned on the electric heating element.

3. The cooktop appliance of claim 1, further comprising a wireless receiver operably connected to the controller, wherein the controller is configured for receiving a signal from the temperature sensor using the wireless receiver, and wherein the controller is configured for detecting the disconnection of the temperature sensor when the signal from the temperature sensor is interrupted during the duty cycle.

4. The cooktop appliance of claim 1, further comprising a user interface operatively connected to the controller, wherein the controller is configured for generating the temperature setting in response to a user input received via the user interface.

5. The cooktop appliance of claim 1, wherein the electric heating element is a resistance heating element.

6. The cooktop appliance of claim 1, wherein the electric heating element is an induction heating element.

7. A cooktop appliance, comprising:

an electric heating element positioned on a cooktop surface of the cooktop appliance; and

a controller operably connected to the electric heating element, the controller configured for;

monitoring a temperature with a temperature sensor;

adjusting a power level of the electric heating element based at least in part on the monitored temperature over a first period of time;

deactivating the electric heating element for a second period of time based at least in part on the monitored temperature;

storing the first period of time in a memory of the controller;

storing an average power level over the first period of time in the memory of the controller;

storing the second period of time in the memory of the controller;

detecting a disconnection of the temperature sensor;

operating the heating element at the stored average power level for a first duration of time equal to the stored first period of time; and

deactivating the heating element for a second duration of time equal to the stored second period of time.

8. The cooktop appliance of claim 7, wherein the monitored temperature is a temperature associated with a cooking utensil positioned on the electric heating element.

9. The cooktop appliance of claim 7, further comprising a wireless receiver operably connected to the controller, wherein the controller is configured for receiving a signal from the temperature sensor using the wireless receiver, and wherein the controller is configured for detecting the disconnection of the temperature sensor when the signal from the temperature sensor is lost.

10. The cooktop appliance of claim 7, wherein the controller is further configured for generating a temperature setting, wherein the step of adjusting the power level is based at least in part on the temperature setting and the step of deactivating the electric heating element for the second period of time is based at least in part on the temperature setting.

11. The cooktop appliance of claim 10, further comprising a user interface operatively connected to the controller, wherein the controller is configured for generating the temperature setting in response to a user input received via the user interface.

12. The cooktop appliance of claim 7, wherein the electric heating element is a resistance heating element.

13. The cooktop appliance of claim 7, wherein the electric heating element is an induction heating element.

14. A cooktop appliance, comprising:

an electric heating element positioned on a cooktop surface of the cooktop appliance; and

a controller operably connected to the electric heating element, the controller configured for;

generating a temperature setting;

operating the electric heating element at a power level;

monitoring a temperature with a temperature sensor;

inputting the monitored temperature into a control loop;

adjusting the power level of the electric heating element based at least in part on an output of the control loop;

storing temperature data in a memory of the controller, the stored temperature data comprising a maximum value of the monitored temperature, a minimum value of the monitored temperature, and a time interval between the maximum value and the minimum value;

detecting a disconnection of the temperature sensor;

inputting the stored temperature data into the control loop; and

adjusting the power level of the electric heating element based at least in part on an output generated by the control loop in response to the stored temperature data input.

15. The cooktop appliance of claim 14, wherein the stored data further comprises an intercept value of the monitored temperature equal to the temperature setting and a time interval between the intercept value and one of the maximum value and the minimum value.

16. The cooktop appliance of claim 14, wherein the monitored temperature is a temperature associated with a cooking utensil positioned on the electric heating element.

17. The cooktop appliance of claim 14, further comprising a wireless receiver operably connected to the controller, wherein the controller is configured for receiving a signal from the temperature sensor using the wireless receiver, and wherein the controller is configured for detecting the disconnection of the temperature sensor when the signal from the temperature sensor is lost.

18. The cooktop appliance of claim 14, further comprising a user interface operatively connected to the controller, wherein the controller is configured for generating the temperature setting in response to a user input received via the user interface.

19. The cooktop appliance of claim 14, wherein the electric heating element is a resistance heating element.

20. The cooktop appliance of claim 14, wherein the electric heating element is an induction heating element.