An electric cooking appliance includes a glass-ceramic substrate having a top surface for supporting cookware for heating thereon, and a bottom surface opposite the top surface. The electric cooking appliance includes a plurality of thermoresistive heating elements disposed and spaced apart on the bottom surface of the glass-ceramic substrate, with each of the plurality of thermoresistive heating elements including graphene nanoparticles embedded in a ceramic matrix for generating heat upon application of electric current to the respective thermoresistive heating element. Each thermoresistive heating element is electrically connected to a power supply such that one or more of the plurality of thermoresistive heating elements are selectively activated to receive electric current to heat localized areas of the glass-ceramic substrate.

A method of operating a cooktop appliance in a precision mode includes determining a starting temperature and a set of parameters of a closed-loop algorithm for operation of a heating element corresponding to the starting temperature. The method also includes inputting a user-determined set temperature and a current temperature measurement into the closed-loop control algorithm and determining an output of the closed-loop control algorithm using the set of parameters corresponding to the starting temperature. Operation of the heating element is adjusted according to the output of the closed-loop control algorithm.

A method of operating a cooktop appliance includes receiving a first user-determined set temperature, determining a first set of parameters for a closed-loop control based on the first user-defined set temperature and operating a heating element of the cooktop appliance according to a first output of closed-loop control using the first set of parameters. The method also includes receiving a second user-determined set temperature after the first user-defined set temperature. The second user-defined set temperature differs from the first user-defined set temperature. The method further includes determining a second set of parameters of the closed-loop control based on the second user-determined set temperature, and operating the heating element according to a second output of the closed-loop control using the second set of parameters based on the second user-determined set temperature.

A method for controlling an oven that incudes selecting a function of the oven using an actuator located in or on a control panel of the oven to cause an electrical signal to be generated that identifies a function of the oven. In response to the electrical signal being generated, energizing an electrical motor that is mechanically coupled to a rotary position switch and not mechanically coupled to the actuator. The method including rotating the rotary position switch to a position corresponding to the function of the oven by use of the electric motor after the electrical signal is generated.

An oven comprising a housing, a cook cavity located within the housing, wherein the housing includes an opening to the cook cavity and the cook cavity is configured to receive a food item through the opening, an oven door for covering the opening, a heating element configured to heat an air within the cook cavity, an active vent interconnecting the cook cavity and an outside of the housing, and a controller operatively coupled to the active vent and the heating element is disclosed. The controller is configured to perform the steps of (a) turning on the heating element to initiate a cooking cycle, (b) keeping the active vent closed during an initial stage of the cooking cycle, (c) after the initial stage of the cooking cycle, opening the active vent, and (d) keeping the active vent open during at least a portion of a remainder of the cooking cycle.

An infrared emitter includes a first refractory layer of a first refractory material, a coiled wire disposed over the first refractory material, and a second refractory layer of a second refractory material, and a portion of the second refractory layer is disposed within a void of the coiled wire.

A temperature-regulating unit includes a base, a resonant tank, and a controller. The base is configured to support a pan. The resonant tank includes a coil and a capacitor. The resonant tank has a resonant frequency that is affected by a material of the pan and a temperature of the pan. The controller is configured to receive a temperature setting, monitor the resonant frequency, determine the material of the pan based on the resonant frequency, determine the temperature of the pan based on the resonant frequency, and adaptively control a thermal element based on the temperature of the pan, the material of the pan, and the temperature setting.

A range has burner coil elements which have temperature switches as a portion of the replaceable coils. Upon reaching a predetermined temperatures, the switch opens and power through the burner element is secured. The burner elements are preferably open coil units. Lowering the temperature in a cooking utensil below common ignition temperatures while still allowing boiling is an objective of many embodiments.

An apparatus and method for cooking at a constant temperature in an oven including performing a temperature raising operation of operating at least one of at least one heater and at least one circulation fan until a temperature of a preset ratio of a set temperature is reached, continuing the operating at the set temperature for a preset period, and setting an operation level by considering a temperature of the oven at an end of a current period and a temperature of the oven at a start of the current period. The method includes performing a temperature maintaining operation of operating at least one of the at least one heater and the at least one circulation fan for one period according to the set operation level, and repeating the setting of the operation level and the temperature maintaining operation until cooking is completed.

An induction heating type cooktop includes a case, a cover plate that is coupled to an upper end of the case and that includes an upper plate configured to seat an object on an upper surface of the upper plate, a working coil disposed in the case and configured to heat the object, a thin film attached on the upper plate, and a thermal insulating member disposed vertically between a lower surface of the upper plate and the working coil.