An electric heater includes a substrate (an insulating material capable of forming a conductor pattern on a surface of an insulating substrate), a first plane heating element formed on one surface of the substrate, and a second plane heating element formed on one surface of the substrate to be located outside the first plane heating element. The first plane heating element includes a first pattern portion connecting a start point with an end point located in a first zone, a pair of first electrodes located outside the first zone, and a pair of first connectors connecting the first pattern portion with the first electrodes. The second plane heating element includes a second pattern portion located in a second zone surrounding the first zone and connecting a start point with an end point, and at least some of the first connectors are located in the second zone.

A heater structure includes a heating unit, a power supply holder, a second conducting element, a locking component, a docking component, a printed circuit board and an identification circuit. The heating unit includes a heating container, a first conducting element and a locking component. The power supply holder has a housing. The housing is connected with an extending wall. The housing is cooperated with the extending wall to define an inner space for accommodating the heating unit. A peripheral wall of the housing is recessed downward and sideward to form a locking groove. The second conducting element is mounted in the inner space. The second conducting element is connected with the first conducting element. The locking component is locked in the locking groove. The docking component is disposed in the inner space. The printed circuit board is mounted to a bottom of the power supply holder.

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 invention relates to an electric oven capable of reducing contaminants, the electric oven comprising: an oven body having a cavity capable of accommodating food therein; and a convection assembly which is installed to protrude from one surface of the cavity and which can suck and remove contaminants generated when cooking the food and can heat the inside of the cavity. The convection assembly comprises: a cover case, protruding from one surface of the cavity, including a front surface which is spaced apart from the one surface of the cavity and has an inlet port, and a side surface which extends from the front surface to the one surface of the cavity and has an outlet port; a convection fan which is installed inside the cover case and allows air containing the contaminants to be sucked into the cover case through the inlet port and discharged through the outlet port; and a convection heater for heating the air sucked into the cover case by the convection fan to remove the contaminants, wherein the air discharged from the cover case moves in an upward inclined direction with respect to the one surface of the cavity.

An oven has a housing defining a cooking cavity. A door is configured to open and close to provide access to the cooking cavity. At least one gas heating element is provided at a lower portion of the cooking cavity, and an electric heating element is provided at an upper portion of the cooking cavity.

An oven appliance may include a cabinet, a plurality of chamber walls, a cooking surface, a top heating element, a temperature sensor, and a controller. The cooking surface may be defined in a cooking chamber. The top heating element may be mounted above the cooking surface to heat the cooking chamber. The temperature sensor may be disposed within the cabinet. The controller may be configured to initiate a cooking operation that includes initiating preheat activation of the top heating element, receiving temperature signals from the temperature sensor during the preheat activation, determining a preheat threshold is met based on the received temperature signals, and initiating cooking activation of the top heating element based on a cooking cycle having a predetermined time interval subsequent to determining the preheat threshold is met. Initiating cooking activation may include directing the top heating element based on the cooking cycle for the predetermined time interval.

An electric heater includes a substrate, and a plane heating element that is located at a surface of the substrate and that includes a pattern portion having a start point and an end point that are connected to each other. The pattern portion includes a plurality of tracks that are spaced apart from one another, that have an arc shape, and that are arranged at positions from an inner side of the pattern portion to an outer side of the pattern portion, where lengths of the plurality of tracks increase from the inner side to the outer side. The plurality of tracks include at least two tracks that are arranged respectively about a first center of curvature and a second center of curvature that is different from the first center of curvature.

A cooking appliance is adapted to perform either as a single large fan-forced convection oven capable of cooking a larger food, or as two smaller independently-operable fan-forced convection ovens each capable of cooking smaller foods. Features of the cooking element arrangement provide faster, more efficient, and higher quality results regardless of the size and amount of food being cooked.

An oven appliance may include a cabinet, a plurality of chamber walls, a top heating element, and a cooking plate. The plurality of chamber walls may be mounted within the cabinet and define a cooking chamber. The plurality of chamber walls may include a back wall, a top wall, a first side wall, a second side wall, and a bottom wall. The top heating element may be mounted within the cabinet to heat the cooking chamber. The top heating element may define a horizontal heating profile within the cooking chamber. The cooking plate may be disposed within the cooking chamber below the top heating element. The cooking plate may define a cooking surface having a horizontal cooking profile. The horizontal cooking profile may be matched to the horizontal heating profile.