Electromagnetic induction heating device
AssigneesWakoh Denken Kabushiki Kaisha, Hoshizaki Denki Kabushiki Kaisha
InventorsTakakazu Hayashi, Sizunao Hattori
Life of this patent
Estimating the term…
Abstract
Provided is a low cost and highly safe electromagnetic induction heating device capable of uniformly heating an object to be heated. A work coil (26) has a basic coil (28) located at the innermost position, a first coil (30) located at the intermediate position, and a second coil (32) located at the outermost position, the latter two coils being connected in series to the basic coil (28). The first coil (30) and the second coil (32) are connected in parallel to each other. A switching circuit (16) for supplying a high-frequency current is connected to the first coil 30, and a second switching circuit 18 for supplying a high-frequency current is connected to the second coil 32.
Claims5
An electromagnetic induction heating device provided with a resonant circuit having an induction heating coil (26) which heats an object to be heated (38), and a switching circuit which supplies a high-frequency current to the resonant circuit, characterized in that
- the induction heating coil (26) includes a plurality of first coils (30, 32) connected in parallel to one another, and a second coil (28) connected in series to each of the first coils (30, 32), and the individual coils (28, 30, 32) are arranged substantially concentric on a substantially same plane,
- the resonant circuit is divided with each of the first coils (30, 32) and the second coil (28) as a set, and
- the independent switching circuits (16, 18) are connected to the respective resonant circuits (20, 22).
Dependencies are inferred from the claim text.