US Patent No. 10,397,987

INDUCTION HEATING ARRANGEMENT, METHOD FOR OPERATING AN INDUCTION HEATING ARRANGEMENT AND INDUCTION HOB


Patent No. 10,397,987
Issue Date August 27, 2019
Title Induction Heating Arrangement, Method For Operating An Induction Heating Arrangement And Induction Hob
Inventorship Michael Herzog, Rothenburg ob der Tauber (DE)
Marco Saporetti, Forli (IT)
Jurgen Leikam, Rothenburg ob der Tauber (DE)
Assignee Electrolux Appliances Aktiebolag, Stockholm (SE)

Claim of US Patent No. 10,397,987

1. An induction heating arrangement, comprising:a first induction coil having a first diameter and being arranged in a first plane;
at least two second induction coils having at least one second diameter and being arranged in a second plane, wherein each second diameter is smaller than the first diameter;
the second induction coils being arranged around the first induction coil and each of the second induction coils partially overlapping with the first induction coil in respective overlapping regions;
a control device configured to operate either, in a first operational state, the first induction coil while not operating any of the second induction coils or, in a second operational state, at least one of the second induction coils while not operating the first induction coil; and
a plurality of guide elements for a magnetic flux operatively associated with each of said respective induction coils, each said guide element comprising ferrite, wherein all of the plurality of guide elements operatively associated with the first induction coil are arranged outside the overlapping regions, and
wherein in each said overlapping region at least one of said guide elements for the magnetic flux operatively associated with the respective second induction coil is arranged radially aligned with a centre of the first induction coil and a centre of the respective second induction coil, and at least two of said guide elements for the magnetic flux operatively associated with the respective second induction coil are parallel to each other.