High frequency cooking device having electromagnetic induction heater
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jan 5, 1993
Grant Date -
N/A
app pub date -
Jun 11, 1991
filing date -
Jul 5, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cooking heater comprises a housing provided thereon with an operation control panel including a plurality of function keys, a cooking room disposed in the housing, the cooking room having a bottom formed by a non-magnetic metal mesh having a size in a range from 10 mesh to 25 mesh, a turntable disposed within the heating room for containing food to be cooked, magnetron for generating microwaves, a wave guide for guiding said microwaves into the cooking room, an electromagnetic induction coil disposed below the non-magnetic metal mesh, and means for selectively coupling electric power to the magnetron or the induction coil. The non-magnetic metal mesh may be sandwiched between two layers of dielectric material to form a laminated structure to thereby absorb any thermal deformation of the mesh. The turntable is preferbly formed of dielectric material. The cooking heater may further comprise a warning means for setting a preheating time and producing an audible warning signal when the preheating time elapses, and the funtion keys may include a preheating key such that the warning means is actuated by depression of the preheating key.
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