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.

An over-the-range appliance mountable over a cooktop appliance is provided. The over-the-range appliance includes a cabinet comprising a bottom panel defining a central aperture, a lighting box mounted within the central aperture. The lighting box defines a lighting recess and one or more light sources are mounted to the lighting box and are positioned within the lighting recess. A diffuser plate is positioned over the one or more light sources and encloses the lighting recess.

A cooking appliance includes a cooktop having at least one sensor operating field. The at least one sensor operating field has at least one scroll field for step by step modification of a multi-value operating parameter of the cooking appliance. The at least one scroll field has a number of discretely disposed sensor keys which are disposed below a cooktop plate.

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.

The invention relates to the asymmetric structure, in terms of the layer structure, of two or more stone slabs—generally two—wherein the load-bearing bottom slab is designed to be thicker than the top slab which is to be stabilized and which forms the surface of an induction hob assembly. The thickness or stiffness of the bottom stone slab is designed in conjunction with an adequately dimensioned tension-resistant fibre layer such that the tensile stresses in the top slab resulting from the expansion of the top slab during cooking, especially on the surface, because of the bi-metal effect, that is to say from dishing up of the slab, are not exceeded to avoid any hairline crack formation. To this end, the cross-section and/or the stiffness of the bottom slab is to be designed to be so thick in the counter-stabilizing edge regions that the expansion forces of the top stone slab in the cooking zone are adequately compensated for by the compression zone beneath the tension-resistant fibre layer such that the maximum permissible tensile stress on the surface of the top stone slab, which makes up the hob, is not exceeded even if the maximum permissible cooking temperature is reached. In order to prevent deflection or dishing of the entire assembly as a result of the bi-metal effect, a sufficiently porous stone material is selected for the surface which is compressible in volume and/or preferably less resistant to compression than the bottom stabilizing slab, which provides the counter-pressure. To receive the induction coil, the slab assembly is milled out from below to close to the surface, so that the distance between the induction coil and the pan is as small as possible. The milled-out portion is designed to be domed to enhance mechanical stability against pressure and impact from above. Additional fibre reinforcement can be applied here to provide greater support. Circulating air layers are used beneath and, where necessary, on top of the stone surface to keep the surface temperatures on the hob and on the underside of the cooking zone as low as possible. These measures together serve the purpose of preventing the usual hairline cracking on the surface of the complete assembly.

The invention relates to a food cooking device (300) having a plurality of heating means (301 a-301 d) for heating a respective food item. The device is provided with control means (302) arranged to individually control energy supply to each of the heating means (301 a-301 d). According to the invention the device (300) includes a microprocessor (303) with downloading means (304) arranged to download a set of food cooking process data. The control means (302) is arranged to control the energy supply in response to the downloaded set of food cooking process data. The invention also relates to an electronic library (600) having a plurality of information units, which are arranged to be downloadable from external users. According to this aspect of the invention each information unit includes a set of food cooking process data. Each set includes at least two food item cooking instructions. Each food item instruction includes data defining a food item and one or more groups of operation parameters. Each group of operation parameters includes energy supply data and related time duration data for heating means in a cooking device. The invention also relates to a method for cooking food and to a method for providing food cooking support.

A cooktop includes a knob assembly coupled to a control panel and configured to control a heating part. The knob assembly includes: a knob body disposed at a front surface of the control panel and rotating with respect to a rotation shaft extended in a front-rear direction, a knob ring disposed at a rear side of the knob body and having a diameter greater than a diameter of the knob body, and a light source part disposed at the rear side of the knob body and including one or more light sources irradiating light to the rear side of the knob body. A portion of a rear surface of the knob body includes a first reflective surface reflecting light, and a portion of a surface of the knob ring includes a second reflective surface reflecting light, the portion of the surface of the knob ring facing the knob body.

A cook top includes an inputter configured to receive input of a user manipulation, and a cooker configured to heat a cooking device placed on the cook top. A communicator is configured to perform communication with a user terminal device and a range hood. A processor is configured to: control an operating state of the cooker according to the user manipulation, transmit a signal for controlling an operating state of the range hood to correspond to the operating state of the cooker to the range hood, and control the communicator to transmit state information of the cook top that includes information of the operating state of the cooker to the user terminal device.

An electric heater includes a substrate; and a plane heating element disposed on one surface of the substrate. The plane heating element includes a pattern portion including a start point and an end point, which are located at an outermost side of the pattern portion, the pattern portion including a plurality of tracks having an arc shape, which are spaced apart from each other and are formed to have a length increasing from an innermost side to the outermost side of the pattern portion, and a plurality of bridges connecting the plurality of tracks in series. The plurality of bridges are formed on both sides of the pattern portion with respect to a reference line passing through a center of the pattern portion, and an innermost gap between the pair of bridges located at the innermost side of the pattern portion is narrower than an outermost gap between a pair of bridges located at the outermost side of the pattern portion.

An electric heater includes a substrate; and a first plane heating element disposed on one surface of the substrate, in which the first plane heating element includes a first track; a second track spaced apart from the first track; and a third track spaced apart from the second track. At least a portion of the second track is located between the first track and the third track, and the first track and the second track are connected by a first bridge, where the first bridge includes a first outer protrusion protruding toward the third track. The third track is formed with a curved portion which protrudes in an outward direction, and the first outer protrusion faces an inside of the curved portion in the outward direction and is spaced apart from the curved portion.