| 摘要 |
PROBLEM TO BE SOLVED: To focus a magnetic flux on the center of a heating material efficiently, uniformly heat by induction the whole heating material by arranging a work coil on the heating material side of a non-magnetic material plate, and inserting a ferrite core into the central space of the work coil to ensure a magnetic flux path in the central part of the work coil. SOLUTION: A coil wire 2' is wound in one layer except for a space S in the central part on the bottom surface of a non-magnetic material plate 1 made of heat resistant glass for example to form a work oil 2. A ferrite core 4 is inserted into the space S, and a copper pipe 7 having slits and a copper ring 8 are arranged in the surrounding of the ferrite core 4. A radiate ferrite core 6 whose one end is connected to the ferrite core 4 through a ferrite table plate 10 and other end is connected to the main ferrite 3 is arranged on the lower side of the work coil 2, and they are supported with aluminum plates 11, 12. Electricity is passed to the work coil 2 through terminals 13, 13', a magnetic flux 5 generated is focused on the ferrite core 4 through the main ferrite 3' and the radiate ferrite core 6, and uniformly supplied to a pan 9 from the center over the whole. |
