The coil substrate may include a substrate; a first conductor layer including a plurality of first and second segments periodically disposed on a top and a bottom of the substrate; a second conductor layer including a plurality of first and second segments periodically overlapping the first conductor layer on the top and the bottom of the substrate; a first connection line that connects the first and second segments of the first conductor layer; and a second connection line that connects the first and second segments of the second conductor layer. The first connection line includes a first region exposed on at least one of first and second surfaces that are opposite to each other of the substrate and second and third regions disposed through the substrate from both sides of the first region.

An aerosol-generating device for generating an aerosol by inductive heating of an aerosol-forming substrate is provided, the device including: a device housing including a cavity configured to removably receive the substrate to be heated; an inductive heating arrangement including at least one induction coil configured to generate an alternating magnetic field within the cavity, the coil being arranged around at least a portion of the cavity; and a flux concentrator arranged around at least a portion of the induction coil and configured to distort the alternating magnetic field of the at least one inductive heating arrangement towards the cavity, the flux concentrator including or being made of a flux concentrator foil, and the flux concentrator foil including at least one of a permalloy or a nano-crystalline soft magnetic alloy. An aerosol-generating system including the aerosol-generating device and an aerosol-generating article is also provided.

An aerosol-generating device is provided, including: an inductive heating arrangement to heat an aerosol-forming substrate and including: a susceptor arrangement heatable by penetration with a varying magnetic field, a first LC circuit having a resonance frequency and including a first inductor coil and capacitor, and a second LC circuit having the same resonance frequency and including a second inductor coil and capacitor; and a controller to drive the first and second circuits with respective first and second currents for generating respective first and second alternating magnetic fields for heating respective first and second portions of the susceptor, supply the first and currents with the resonance frequency a different frequency, respectively, supply the first current to the first circuit during a first phase to increase the first portion to a first operating temperature, and supply the first current with resonance frequency of the circuits during the first phase.

A cooking appliance according to an embodiment of the present invention may comprise: a case in which a cooking chamber is formed; a door for opening or closing the front opening of the case; a steam generating device mounted to the outer surface of the case; and a steam supply tube for connecting the steam generating device to the cooking chamber, wherein the steam generating device includes: a housing fixed to the case; a drawer which can be pushed into and pulled out of the housing and is filled with water for steam generation; and an induction unit installed at the bottom of the housing so as to heat water filled in the drawer by using electromagnetic induction.

A cooking appliance according to an embodiment of the present invention may comprise: a case in which a cooking chamber is formed; a door for opening or closing the front opening of the case; a steam generating device mounted to the outer surface of the case; and a steam supply tube for connecting the steam generating device to the cooking chamber, wherein the steam generating device includes: a housing fixed to the case; a drawer which can be pushed into and pulled out of the housing and is filled with water for steam generation; and an induction unit installed at the bottom of the housing so as to heat water filled in the drawer by using electromagnetic induction.

An induction heating apparatus including an inverter comprising a switching element, the inverter configured to supply a power to a first node based on an operation of the switching element; a first heating coil around which a wire is wound in a first winding direction with respect to the first node and configured to be heated by the power supplied from the first node; a second heating coil around which a wire is wound in a second winding direction different from the first winding direction with respect to the first node and configured to be heated by the power supplied from the first node; and at least one processor configured to control a resonance frequency of a current flowing through the first heating coil and the second heating coil.

An induction heating cooker includes a housing, an inner pot including a bottom part that includes a first area and a second area, and an inner pot storage part disposed in the housing. The inner pot storage stores the inner pot in a manner that the inner pot can be set or removed. Also, a first heating coil is below the inner pot storage part, arranged in a position facing the first area of the inner pot, that heats the inner pot by induction. Also, a second heating coil is below the inner pot storage part, arranged in a position facing the second area of the inner pot, that heats the inner pot by induction. A driving unit in the housing supplies high frequency currents to the first heating coil and the second heating coil, and a controller controls the driving unit.

An induction heating cooker includes a housing, an inner pot including a bottom part that includes a first area and a second area, and an inner pot storage part disposed in the housing. The inner pot storage stores the inner pot in a manner that the inner pot can be set or removed. Also, a first heating coil is below the inner pot storage part, arranged in a position facing the first area of the inner pot, that heats the inner pot by induction. Also, a second heating coil is below the inner pot storage part, arranged in a position facing the second area of the inner pot, that heats the inner pot by induction. A driving unit in the housing supplies high frequency currents to the first heating coil and the second heating coil, and a controller controls the driving unit.

Apparatuses, systems and methods of providing heat to enable an FDM additive manufacturing nozzle having refined print control and enhanced printing speed. The heating element may include at least one sheath sized to fittedly engage around an outer circumference of the FDM printer nozzle; at least one wire coil at least partially contacting an inner diameter of the sheath; and at least one energy receiver associated with the at least one wire coil.

Apparatuses, systems and methods of providing heat to enable an FDM additive manufacturing nozzle having refined print control and enhanced printing speed. The heating element may include at least one sheath sized to fittedly engage around an outer circumference of the FDM printer nozzle; at least one wire coil at least partially contacting an inner diameter of the sheath; and at least one energy receiver associated with the at least one wire coil.