US 12,302,480 B2
Induction heater for a cooking surface
Antonio De Moliner, Oderzo (IT); Fabrizio Dughiero, Padua (IT); Francesco Giusto, Mestre (IT); Marcello Zerbetto, Padua (IT); and Federico Zoppas, Treviso (IT)
Assigned to I.R.C.A. S.P.A. INDUSTRIA RESISTENZE CORAZZATE E AFFINI, Vittorio Veneto (IT)
Appl. No. 16/762,537
Filed by I.R.C.A. S.P.A. INDUSTRIA RESISTENZE CORAZZATE E AFFINI, Vittorio Veneto (IT)
PCT Filed Nov. 9, 2018, PCT No. PCT/IB2018/058829
§ 371(c)(1), (2) Date May 8, 2020,
PCT Pub. No. WO2019/092651, PCT Pub. Date May 16, 2019.
Claims priority of application No. 102017000128351 (IT), filed on Nov. 10, 2017.
Prior Publication US 2020/0267805 A1, Aug. 20, 2020
Int. Cl. H05B 6/12 (2006.01)
CPC H05B 6/1209 (2013.01) [H05B 6/1254 (2013.01); H05B 6/1263 (2013.01); H05B 6/1281 (2013.01); H05B 2206/022 (2013.01); H05B 2213/03 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An induction heater for a cook top comprising:
a first electrically insulating sheet;
a second electrically insulating sheet;
one or more inductors arranged on a same plane between the first electrically insulating sheet and the second electrically insulating sheet, each inductor of said one or more inductors comprising a single electrically conductive track defining a flat spiral coil;
at least one magnetic flux concentrator arranged on a plane under the second electrically insulating sheet;
a metallic heat sink plate arranged under the at least one magnetic flux concentrator, adapted to dissipate heat produced by the one or more inductors;
wherein each turn of a plurality of turns of each inductor is shaped so as to have four rectilinear stretches parallel in pairs, and four curved stretches, wherein two mutually successive rectilinear stretches are joined by a respective curved stretch; and
wherein a radius of curvature of the four curved stretches gradually increases from an innermost turn to an outermost turn;
wherein the one or more inductors are provided with at least two terminals;
wherein the induction heater comprises an electronic power module provided with a plurality of electrically conductive columns, and an electrical connection and fixing means inserted in a respective electrically conductive column;
wherein each one of the plurality of electrically conductive columns is electrically connected to a respective terminal of said at least two terminals by the electrical connection and fixing means.