Disclosed herein is a cooking appliance. A working coil is provided at a lower portion of the cooking appliance. The working coil heats a tray disposed in a cooking compartment in an IH mode. A receiver coil wirelessly receiving external power is stacked below the working coil. An electromagnetic shielding plate is installed between the working coil and the receiver coil to partition a space in which the two coils are installed. The electromagnetic shielding plate shields an electromagnetic field or electromagnetic waves such that the electromagnetic field or electromagnetic waves in one of the two partitioned spaces does not leak to the other space located across the electromagnetic shielding plate.

The present invention relates to an induction cooking hob (10) comprising at least one cooking zone (12) including one induction coil (14). The induction cooking hob (10) comprises at least one user interface (22) including at least one display with at least one indicator corresponding with one cooking zone (12, 28, 30, 32). The induction coil (34, 36, 38, 40) is provided for detecting at least one parameter related to the power of the electromagnetic field generated by said induction coil (34, 36, 38, 40). The induction cooking hob (10) comprises a memory for storing a maximum value of the parameter detected by the induction coil (14) of the cooking zone (12) when a cooking pot (26) is arranged upon said cooking zone (12). The indicator corresponding with the cooking zone (12) indicates a signal related to an incorrect position of the cooking pot (26), if the currently detected value of the parameter is lower than the maximum value of said parameter.

An induction coil arrangement is provided for use in inductive transfer of power to an object that is formed of or contains a ferromagnetic material. The induction coil arrangement has an induction coil and a support to which the induction coil is mounted to support the induction coil. The support is flexible so as to allow the induction coil to move. The support has a plurality of permanent magnets arranged such that, when an object that is formed of or contains a ferromagnetic material is placed over the support, the permanent magnets interact with the ferromagnetic material of the object to move the induction coil relative to a said object so as to centre the induction coil relative to the object.

A cooling appliance is proposed. A cavity (S) may be provided inside a casing (100, 200). A first heat source module (400) may be arranged in the casing (100, 200) and emit microwaves. A second heat source module (500) may be arranged at a bottom surface of the casing (100, 200) and emit magnetic fields. In addition, the second heat source module (500) may include a base plate (510) having a base hole (512) that is open at a center portion thereof, and a supporter (520) arranged below the base plate (510). A coil assembly (550) may be arranged between base plate (510) and the supporter (520). At this point, a shield filter (540) of the second heat source module (500) covers a working coil (570) of the coil assembly (550), and an outer end of the shield filter (540) may be arranged between the base plate (510) and a coil base (560).

An induction heating cooking apparatus includes a plurality of heating coils aligned in at least one row on a flat surface, a plurality of inverter circuits each configured to supply a high-frequency current to the corresponding one of the plurality of heating coils, and a controller configured to control driving of the plurality of inverter circuits. The plurality of heating coils include a first heating coil and a second heating coil that are adjacent to each other. The controller is configured to, when a material forming a heating target loaded on an upper part of the first heating coil is a magnetic material, and a material forming the heating target loaded on an upper part of the second heating coil at least includes a nonmagnetic material, set a frequency of the high-frequency current supplied to the second heating coil higher than a frequency of the high-frequency current supplied to the first heating coil.

A heating assembly for a cooking appliance includes at least one induction coil. A drive circuit is configured to control a coil current through the at least one induction coil. The drive circuit includes a first switching circuit operable to conduct the coil current and a second switching circuit operable to conduct the coil current. A sensing circuit is configured to detect a polarity of the coil current. A control circuit is configured to communicate a first activation signal to the first switching circuit during a first activation period. The control circuit is further configured to communicate a second activation signal to the second switching circuit during a second activation period. The control circuit is further configured to control a delay between the first activation signal and the second activation signal based on the polarity of the coil current.

A cooking appliance includes a coil height adjustor configured to adjust a height of a working coil or a plurality of working coils located at different height and an inverter configured to control the current flow through the working coil or at least one working coil of the plurality of working coils.

A cooking appliance includes a magnetic field control module that selectively cancels a portion of a magnetic field reaching an intermediate heating element generated from a working coil. The magnetic field control module may include a canceling coil and a switch capable of closing or opening the canceling coil.

A cooking appliance includes an upper plate configured to support an object to be heated, a first intermediate heating body located at the upper plate, a plurality of working coils configured to generate magnetic fields coupled to at least one of the object to be heated and the first intermediate heating body, an inverter configured to apply current to the plurality of working coils, and a controller configured to control the inverter so that at least one of the plurality of working coils does not operate in a portion of a cycle in a first heating mode.

An induction cooktop includes a cooktop surface, a plurality of power delivery coils in an array beneath the cooktop surface, a cooking article detector, a light source directed toward the cooktop surface, and a controller. The controller receives a signal from the cooking article detector including size and position information for at least one detected cooking article on the cooktop surface and determines that a detected position of the detected cooking article does not correlate with a preferred position of the cooking article with respect to at least one of the plurality of power delivery coils. The controller then presents an indication, via the light source, of the preferred position of the detected cooking article on at least one of the detected cooking article and the cooktop surface.