A food heating appliance primarily directed for cooking tacos comprises a frame, a heating element assembly connected to the frame, and a grill panel connected to the frame. The grill panel has an articulated form which defines several spaced apart troughs with trough having a bottom portion at a bottom level and a top portion at a top level above the bottom level. In various preferred embodiments, the grill panel articulated only on one axis so that each trough has a constant cross section, and has opposed upper portions at the top level. The grill surface panel may be an integral sheet of metal. A heating element assembly has heating elements with elevated, downward arcing portions above the bottom level and at an intermediate level above the bottom level and below the top level of the troughs. The elevated portions of the heating elements are spaced between the troughs.

A food heating appliance primarily directed for cooking tacos comprises a frame, a heating element assembly connected to the frame, and a grill panel connected to the frame. The grill panel has an articulated form which defines several spaced apart troughs with trough having a bottom portion at a bottom level and a top portion at a top level above the bottom level. In various preferred embodiments, the grill panel articulated only on one axis so that each trough has a constant cross section, and has opposed upper portions at the top level. The grill surface panel may be an integral sheet of metal. A heating element assembly has heating elements with elevated, downward arcing portions above the bottom level and at an intermediate level above the bottom level and below the top level of the troughs. The elevated portions of the heating elements are spaced between the troughs.

A cooking grill utilizes at least one resistive heating element below a cooking grate and radiating heat to the cooking grate when a voltage is applied thereto. A first power source provides an alternating current, and a second power source provides a direct current. First and second power sources provide voltage to the at least one resistive heating element individually or simultaneously.

A cooking grill utilizes at least one resistive heating element below a cooking grate and radiating heat to the cooking grate when a voltage is applied thereto. A first power source provides an alternating current, and a second power source provides a direct current. First and second power sources provide voltage to the at least one resistive heating element individually or simultaneously.

Implementations described herein provide a method for processing a substrate on a substrate support assembly which enables both lateral and azimuthal tuning of the heat transfer between an electrostatic chuck and a substrate. The method includes processing a first substrate using a first temperature profile on a substrate support assembly having primary heaters and spatially tunable heaters. A deviation profile is determined from a result of processing the first substrate. The spatially tunable heaters are controlled in response to the deviation profile to enable discrete lateral and azimuthal tuning of local hot or cold spots on the substrate support assembly in forming a second temperature profile. A second substrate is then processed using the second temperature profile.

Provided is an apparatus and method for protecting against unsafe electric current conditions. A protections circuit may be used in a device, such as an electric grill, that has one or more electric loads, such as heating elements. The protection circuit may protect against various failure scenarios, including, without limitation, instances of ground fault, over current, driver failure, and failure of a microprocessor. In response to a failure, the protection circuit may trip a latch relay or disable a triac driver to stop current from flowing.

An electric heater includes a substrate and an inner plane heating element formed on one surface of the substrate. The inner plane heating element includes an inner pattern portion connecting a start point with an end point. The inner pattern portion includes a first track, a second track located outside the first track and spaced part from the first track, a first bridge connecting the first track with one end of the second track, a third track located outside the second track and spaced apart from the second track, and a second bridge connecting the other end of the second track with the third track. A first gap G1 between the first and second tracks is shorter than a second gap G2 between the second and third tracks along a virtual line crossing the first, second and third tracks and closer to the first bridge than the second bridge.

An electric heater includes a substrate and an inner plane heating element formed on one surface of the substrate. The inner plane heating element includes an inner pattern portion connecting a start point with an end point. The inner pattern portion includes a first track, a second track located outside the first track and spaced part from the first track, a first bridge connecting the first track with one end of the second track, a third track located outside the second track and spaced apart from the second track, and a second bridge connecting the other end of the second track with the third track. A first gap G1 between the first and second tracks is shorter than a second gap G2 between the second and third tracks along a virtual line crossing the first, second and third tracks and closer to the first bridge than the second bridge.

The present disclosure relates to an induction heating type cooktop and includes a case; a cover plate configured to be coupled to the upper end of the case and provided with an upper plate portion on which an object to be heated is disposed; a working coil provided inside the case; a thin film configured to be coated on the upper plate portion and to be inductively heated by the working coil; and an adiabatic material provided between the upper plate portion and the working coil, in which the thin film may be formed to have at least one closed loop that does not include a central region of the working coil.

The present disclosure relates to an induction heating type cooktop and includes a case; a cover plate configured to be coupled to the upper end of the case and provided with an upper plate portion on which an object to be heated is disposed; a working coil provided inside the case; a thin film configured to be coated on the upper plate portion and to be inductively heated by the working coil; and an adiabatic material provided between the upper plate portion and the working coil, in which the thin film may be formed to have at least one closed loop that does not include a central region of the working coil.