Work coil for use in an induction cooking appliance
ApplicationNo. 06/133685 filed on 03/25/1980
US Classes:219/624, Core or coil structure219/675, Planar coil336/232Planar type
ExaminersPrimary: Mayewsky, Volodymyr Y.
Attorney, Agent or Firm
International ClassesH05B 6/36 (20060101)
H05B 6/12 (20060101)
Foreign Application Priority Data1979-04-04 JP
AbstractAn improved flat induction heating coil for a cooking apparatus of the type in which an electrically conductive cooking utensil is heated according to the principle of electromagnetic induction. To provide a substantially uniform magnetic flux density distribution in the induction coil constituting a part of the cooking apparatus and, hence, a uniform temperature distribution across the bottom of the cooking utensil, a refractory insulating material is wound adjacent inner turns of the coil to provide a comparatively larger winding pitch for said inner turns than for outer turns. This arrangement makes for a flattened temperature profile and eliminates an uneven cooking of food.