An induction system includes a single power inverter, a plurality of power branches coupled to the single power inverter in parallel, and a controller. Each of the plurality of power branches includes an induction coil, a capacitor coupled to the induction coil to form a resonant circuit, and a power switch coupled in series with the resonant circuit. The controller is configured to regulate an output power of the resonant circuit of each of the plurality of power branches by varying a switching frequency of the single power inverter to adjust the output power of the resonant circuit of all of the plurality of power branches and/or selectively transmitting a signal to the power switch of a respective power branch of the plurality of power branches to turn-on and turn-off the power switch of the respective power branch to individually adjust the output power of each of the plurality of power branches.

An induction heating device capable of preventing a fuse breaking phenomenon that occurs when a user preheats an empty vessel by determining whether or not a load is present in the vessel, and a method for controlling an induction heating device. In order to prevent a rapid rise in temperature of a vessel occurring in process during which a user preheats an empty vessel using an induction heating device and a fuse breaking phenomenon resulting therefrom, a controller of the induction heating device may determine whether or not a vessel placed on a working coil is an empty vessel in a vessel heating process, that is, whether or not a load is present in the vessel.

An electric resistance heating coil assembly includes a spiral wound sheathed heating element having a first coil section and a second coil section. A bimetallic thermostat is connected in series between the first and second coil sections of the spiral wound sheathed heating element. The bimetallic thermostat is spring loaded such that a distal end of the bimetallic thermostat is urged away from a top surface of the spiral wound sheathed heating element. A heat transfer disk is positioned on the bimetallic thermostat at the distal end of the bimetallic thermostat.

A heating apparatus and a heating method are provided. The heating apparatus includes a coil configured to receive AC power to form a magnetic field that inductively heats a workpiece, a spray unit configured to spray cooling fluid including a liquid to the coil in a form of mist at least during a period in which the AC power is supplied to the coil. Alternatively, the spray unit may be configured to spray the cooling fluid in the form of mist to a heating target portion of the workpiece placed in the magnetic field at least during the period in which the AC power is supplied to the coil.

A heating apparatus and a heating method are provided. The heating apparatus includes a coil configured to receive AC power to form a magnetic field that inductively heats a workpiece, a spray unit configured to spray cooling fluid including a liquid to the coil in a form of mist at least during a period in which the AC power is supplied to the coil. Alternatively, the spray unit may be configured to spray the cooling fluid in the form of mist to a heating target portion of the workpiece placed in the magnetic field at least during the period in which the AC power is supplied to the coil.

A sensor holder apparatus for a cooktop comprises a body forming an exterior profile configured to extend through a portion of a housing of the cooktop and position a sensor proximate to an interior surface of a panel forming a cooking surface. A first interior passage is formed through the body and configured to receive the sensor in a first configuration or type. At least one second interior passage is configured to receive the sensor in a second configuration or type. The sensor holder is configured to retain and position the sensor in the first configuration or the second configuration in conductive connection with a panel forming a cooking surface of the cooktop.

A glass-ceramic cooking apparatus and a method relating to temperature limiting control of the glass heating area for preventing cooking oil ignition is disclosed. The apparatus comprises at least one glass surface, at least one heat source under the glass to create a heating area on the glass, one temperature sensor and one control unit for each heat source, wherein the sensor measures the temperature on the underside the glass heating area, and the control unit is electrically connected with the heat source, compares the measured glass temperature with predetermined upper and lower temperature limits that are based on a corresponding relationship between the heating area temperature and the cooking oil temperature within the cooking vessel, and then reduces or increases the output power of the heating source, so that the maximum temperature of the cooking oil in the cooking vessel can be limited in a range that is below the cooking oil ignition point while a minimum temperature can still be maintained for a desired cooking performance.

A cooking system includes an operator interface configured to enable input of an identification characteristic for a placement unit for placement on a cooking surface for purpose of a heating operation, and a control unit configured to release or block a cooking function for the placement unit as a function of the identification characteristic input via the operator interface.

An energy reduction heating apparatus for estimating that an object to be heated is in a boiling state based on vibration information of the object periodically sensed by a vibration sensor, and controlling the amount of electric power supplied to a heater for heating the object based on the comparison result between the intensity of vibration sensed by the vibration sensor and the intensity of vibration corresponding to the boiling state. The energy reduction heating apparatus estimates the boiling state of the object by applying a vibration-based boiling state estimation algorithm to the vibration information. The vibration-based boiling state estimation algorithm can be a neural network model generated through machine learning, can be stored in a memory in the energy reduction heating apparatus, or can be provided through a server in an artificial intelligence environment over a 5G network.

An electric resistance heating coil assembly includes a spiral wound sheathed heating element having a first coil section and a second coil section. A bimetallic thermostat is connected in series between the first and second coil sections of the spiral wound sheathed heating element. The bimetallic thermostat is spring loaded such that a distal end of the bimetallic thermostat is urged away from a top surface of the spiral wound sheathed heating element. A heat transfer disk is positioned on the bimetallic thermostat at the distal end of the bimetallic thermostat.